Regency Horizon HZ42ST-NG Quick start guide

WARNING:
Iftheinformationintheseinstructionsarenotfollowedexactly,
a fire or explosion may result causing property damage,
personal injury or loss of life.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
FOR YOUR SAFETY
What to do if you smell gas:
Do not try to light any appliance
Do not touch any electrical switch:
do not use any phone in your
building.
Immediately call your gas supplier
from a neighbour's phone. Follow
the gas supplier's instructions.
If you cannot reach your gas
supplier, call the fire department.
FPI FIREPLACE PRODUCTS INTERNATIONAL LTD. 6988 Venture St., Delta, BC Canada, V4G 1H4
918-808
Regency Horizon™HZ42ST
Gas Fireplace
12/24/09
Owners &
Installation Manual
www.regency-fire.com
Tested by:
Installer
Installer
: Please complete the details on the back cover
: Please complete the details on the back cover
and leave this manual with the homeowner.
Homeowner: Please keep these instructions for future reference.
MODELS: HZ42ST-NG Natural Gas
HZ42ST-LP Propane

WARNING
HOT GLASS
DO NOT TOUCH
NEVER
WILL
CAUSE BURNS
GLASS
UNTIL COOLED
ALLOW CHILDREN
TO TOUCH GLASS
CHILDREN AND ADULTS SHOULD BE ALERTED TO
THE HAZARDS OF HIGH SURFACE TEMPERATURES,
ESPECIALLY THE FIREPLACE GLASS, AND SHOULD
STAYAWAYTOAVOIDBURNSORCLOTHINGIGNITION.

HZ42ST Regency HorizonTM Gas Fireplace
2
To the New Owner:
Congratulations!
Youaretheownerofastate-of-the-artGasFireplacebyREGENCY®.TheHZ42SThasbeen
designed to provide you with all the warmth and charm of a fireplace at the flick ofaswitch.
The model HZ42 ST has been approved by Warnock Hersey/Intertek for both safety and
efficiency. As it also bears our own mark, it promises to provide you with economy, comfort
and security for many trouble free years to follow. Please take a moment now to acquaint
yourself with these instructions and the many features of your Regency®Fireplace.
MANUFACTURED MOBILE HOME REQUIREMENTS
INFORMATION FOR MOBILE/MANUFACTURED HOMES AFTER FIRST SALE
This Regency®product has been tested and listed by Warnock Hersey/Intertek as a Direct Vent Wall Furnace to the following
standards: VENTED GAS FIREPLACE HEATERS ANSI Z21.88a-2007 / CSA 2.33a-2007 and GAS-FIRED APPLIANCES FOR
USE AT HIGH ALTITUDES CAN / CGA 2.17-M91.
This Direct Vent System Appliance must be installed in accordance with the manufacturer's installation instructions and the
Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280, or the current Standard of Fire Safety Criteria for
Manufactured Home Installations, Sites, and CommunitiesANSI/NFPA501A, and with CAN/CSAZ240-MH Mobile Home Standard
in Canada.
This appliance installation must comply with the manufacturer's installation instructions and local codes, if any. In the absence of
local codes follow the current National Fuel Gas Code,ANSI Z223.1 and the current National Electrical Code ANSI/NFPA70 in the
U.S.A., and the current CAN/CGA B149 Gas Installation Code and the current Canadian Electrical Code CSA C22.1 in Canada.
This appliance comes equipped with a dedicated #8 Ground Lug for attachment of the ground wire to the steel chassis as applicable
to local codes.
The appliance, when installed, must be electrically grounded in accordance with local codes or, in the absence of local codes, with
the National Electrical Code, ANSI/NFPA 70, or the Canadian Electrical Code, CSA C22.1.
This appliance may only be installed in an aftermarket permanently located, manufactured (U.S.Aonly) or mobile home, where not
prohibited by local codes.
This appliance can only be used with the type of gas indicated on the rating plate. This appliance is not convertible for use with
other gases.
Ensure that structural members are not cut or weakened during installation.

HZ42ST Regency HorizonTM Gas Fireplace 3
TABLE OF CONTENTS
SAFETY LABEL
Copy of Safety Decal.....................................................4
REQUIREMENTS
MA Code - CO Detector.................................................5
DIMENSIONS
Unit Dimensions ............................................................6
INSTALLATION
Important Message ......................................................7
Before You Start ............................................................7
General Safety Information............................................7
Installation Checklist......................................................8
Locating Your Gas Fireplace .........................................8
Clearances ....................................................................9
Non-Combustible Requirements ...................................9
Mantel Clearances.......................................................10
Mantel Leg Clearances................................................10
Unit Assembly Prior To Installation..............................11
Standoff Assembly...............................................11
Horizontal vent Deflector installation...........................11
Nailing Strips........................................................11
Framing & Finishing.....................................................12
Framing Dimensions....................................................13
Vent Restrictor Position...............................................14
Exterior Vent Termination Requirements.....................15
4” x 6-5/8” Rigid Pipe Cross Reference Chart.............16
Venting Introduction.....................................................18
Venting Arrangements ................................................18
Allowable Horizontal Terminations for HZ42 ST..18
Horizontal Terminations...............................................19
Flex Vent 4" x 6-5/8"....................................................19
Rigid/Flex Pipe Venting Systems.................................20
Horizontal or Vertical Terminations..............................20
Horizontal Terminations...............................................21
Vertical Terminations ...................................................24
Unit Installation with Horizontal Termination ...............27
Unit Installation with Horizontal Termination ...............28
Unit Installation with Vertical Termination....................29
High Elevation .............................................................30
Gas Line Installation....................................................30
Pilot Adjustment...........................................................30
Gas Pipe Pressure Testing..........................................30
S.I.T. Valve Description................................................30
Aeration Adjustment ....................................................31
Wiring Diagram ...........................................................31
Optional Accent Lighting Wiring Diagram ...................31
Optional Wall Thermostat ...........................................32
Optional Remote Control.............................................32
GT/GTM Remote Features..........................................32
Wall Switch..................................................................32
Optional Reflective Panel Installation..........................33
Optional Light Installation............................................34
Glass Crystals or Optional Ceramic Stones
Installation On Burner..................................................37
Optional Pebble / Crystal Installation...........................38
Glass Door Installation ................................................39
Faceplate Installation...................................................40
OPERATING INSTRUCTIONS
Operating Instructions .................................................42
First Fire ......................................................................42
Lighting Procedure ......................................................42
Shutdown Procedure...................................................42
Normal Operating Sounds of Gas Appliances.............42
Copy of Lighting Plate Instructions..............................43
MAINTENANCE
Maintenance Instructions.............................................44
General Vent Maintenance..........................................44
Thermopile / Thermocouple.........................................44
Glass Gasket...............................................................44
Glass Door...................................................................44
Glass Replacement .............................................44
Glass Door Removal ...................................................45
DC Spark Box Battery Replacement...........................45
DC Spark Box Replacement........................................45
Valve Tray Replacement..............................................46
PARTS LIST
Main Assembly ............................................................48
Accessories.....................................................................
WARRANTY
The Warranty: Limited Lifetime ...................................51

HZ42ST Regency HorizonTM Gas Fireplace
4
INSTALLATION
SAFETY LABEL
This is a copy of the label that accompanies
each HZ42 ST-NG and HZ42 ST-LPDirect Vent
Gas Fireplace. We have printed a copy of the
contents here for your review.
NOTE: Regency®units are constantly being
improved. Check the label on the unit and if
there is a difference, the label on the unit is the
correct one.
COPY OF SAFETY DECAL
FortheState of Massachusetts, installation
and repair must be done by a plumber or
gasfitter licensed in the Commonwealth of
Massachusetts.
For the State of Massachusetts, flexible
connectors shall not exceed 36 inches in
length.
For the State of Massachusetts, the appli-
ances individual manual shut-off must be a
t-handle type valve.
The State of Massachusetts requires the
installation of a carbon monoxide alarm in
accordancewithNFPA720 and aCOalarm
withbatterybackupinthesameroomwhere
the gas appliance is installed.
DO NOT REMOVE THIS LABEL / NE PAS ENLEVER CETTE ÉTIQUETTE
350
350
DOOR SEAL: Please
check that the door is
properly sealed
FPI Fireplace Products International Ltd. Delta, BC, Canada
Minimum Clearances to Combustibles /
Degagement Minimum De Materiaux Combustibles
Serial No./ No de serie
918-809a
MAY BE INSTALLED IN MANUFACTURED (MOBILE) HOMES AFTER FIRST SALE. Listed: Certified for/Certifi e pour: Tested to: WN # 16380
VENTED GAS FIREPLACE HEATER /
CANADA and U.S.A.
FOYER AU GAZ À ÉVACUATION
é
CAN/CGA-2.17-M91,ANSI Z21.88a-2007/CSA 2.33a-2007
Electrical supply / Électrique 115VAC, 1.13 A, 60Hz. NOT FOR USE WITH SOLID FUELS. /
NE PAS UTILISER AVEC DU COMBUSTIBLE SOLIDE.
Made in Canada/ Fabrique au Canada
Duplicate S/N
(See Instruction Manual for
detailed instructions)
ÉÉ
é
QUIP A L'UISINE POUR GAZ PROPANE
CONCU POUR ETRE POELE: Mod le HZ42 ST
PROPANE GAS: Model HZ42ST-LP
Minimum supply pressure Manifold pressure high Manifold pressure low Orifice size Minimum input Maximum input Altitude
NATURAL GAS: Model HZ42ST-NG APPAREIL FONCTIONNANT AU NATURAL GAS
CONCU POUR ETRE POELE: Mod le HZ42 ST Pression d'allimentation minimum Pression à la tubulure d' chappement lev e Pression à la tubulure d' chappement basse Grandeur de l'injecteur D bit minimum selon D bit maximum selon l'altitude
Calorifique Calorifique
é
ééé é
é é
5.0" (1.25 kPa) 3.5" (0.87 kPa) 1.6" (0.40 kPa) #40 DMS 0-4500 ft/pi (0-1372 m)
WC/C.E. WC/C.E. WC/C.E.
17,500 Btu/h (5.13 kW) 26,000 Btu/h (7.62 kW)
Pression d'allimentation minimum Pression à la tubulure d' chappement lev e Pression à la tubulure d' chappement basse Grandeur de l'injecteur D bit minimum selon D bit maximum selon l'altitude
Calorifique Calorifique
ééé é
é é
12“ WC (2.98 kpa)
WC/C.E. WC/C.E.
19,500 Btu/h (5.71 kW) 24,500 Btu/h (7.18 kW) 10" (2..49 kPa) 6.4" (1.60 kPa) #53 DMS 0-4500 ft/pi (0-1372 m)
Minimum supply pressure Manifold pressure high Manifold pressure low Orifice size Minimum input Maximum input Altitude
D
E
F
A
B
C
Side Walls
A 8” (203mm)
B 22” (559mm) C 13" (330mm) D 13” (330mm) E 84" (2133mm) F 36" (914mm) Ceiling Min. Mantel Height Max. Mantel Depth Alcove Width Alcove Depth
This appliance must be installed in accordance with local codes, if any; if none, follow the National Fuel Gas Code, ANSI Z223.1, or Natural Gas and Propane Installation Code, CSA B149.1. This appliance must be installed in accordance with the Standard CAN/CSAZ240 MH, Mobile Housing, in Canada, or with the Manufactured Home Construction and Safety Standard, Title 24 CFR, Part 3280, in the United States, or when such a standard is not applicable,ANSI/NCSBCS A225.1/NFPA501A, Manufactured Home Installations Standard or ANSIA119.2 ou NFPA 501C Standard for Recreational Vehicles This appliance is only for use with the type of gas indicated on the rating plate and may be installed in an aftermarket, permanently located, manufactured (mobile) home where not prohibited by local codes. See owner's manual for details. Installer l'appareil selon les codes ou règlements locaux, ou, en l'absence de tels règlements, selon les codes d'installationANSI Z223.1, National Fuel Gas Code ou CSA-B149.1 en vigueur. Installer l'appareil selon la norme CAN/CSA-Z240, Série MM, Maison mobiles ou CAN/CSA-Z240 VC, Véhicules de camping, ou la norme 24 CFR Part 3280, Manufactured Home Construction and Safety Standard. Si ces normes ne sont pas pertinentes, utilisez la norme ANSI/NCSBCS A225.1/NFPA 501A, Manufactured Home Installations Standard, ou ANSI A119.2 ou NFPA 501C Standard for Recreational Vehicles. This vented gas fireplace heater is not for use with air filters. Ne pas utiliser de filtre à air avec ce foyer au gaz à évacuation. FOR USE WITH GLASS DOORS CERTIFIED WITH THE APPLIANCE ONLY Cet appareil doit être utilize uniquement avec le type de gaz indiqué sur la plaque signalétique. Cet appareil peut être installé dans une maison préfabriquée ou mobile (É.-U. seulement) installée à demeure si les règlements locaux le permettent. Voir la notice de l'utilisateur pour plus de renseignements. Cet appareil ne peut pas être utilisé avec d'autres gaz sauf si une trousse de conversion certifiée est fournie.
POUR UTILISATION UNIQUEMENT AVEC LES PORTES EN VERRE CERTIFIÉES AVEC L'APPAREIL

HZ42ST Regency HorizonTM Gas Fireplace 5
INSTALLATION
REQUIREMENTS
5.08: Modifications to NFPA-54, Chapter 10
(2) Revise 10.8.3 by adding the following additional requirements:
(a) For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for
residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than
seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall
be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of installation of the side wall horizontal vented gas fueled
equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back-up is
installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery
operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure
served by the side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the services of
qualified licensed professionals for the installation of hard wired carbon monoxide detectors
a. In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired carbon
monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
b. In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner shall have a period of
thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery operated carbon
monoxide detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the above provisions
shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight
(8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The
sign shall read, in print size no less than one-half (1/2) inch in size, "GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL
OBSTRUCTIONS".
4. INSPECTION. The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation
unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR
5.08(2)(a)1 through 4.
(b) EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2)(a)1 through 4:
1. The equipment listed in Chapter 10 entitled "Equipment Not Required To Be Vented" in the most current edition of NFPA 54 as adopted by
the Board; and
2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from the dwelling, building or
structure used in whole or in part for residential purposes.
(c) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDED. When the manufacturer of Product
Approved side wall horizontally vented gas equipment provides a venting system design or venting system components with the equipment, the
instructions provided by the manufacturer for installation of the equipment and the venting system shall include:
1. Detailed instructions for the installation of the venting system design or the venting system components; and
2. A complete parts list for the venting system design or venting system.
(d) MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED. When the manufacturer of a
Product Approved side wall horizontally vented gas fueled equipment does not provide the parts for venting the flue gases, but identifies
"special venting systems", the following requirements shall be satisfied by the manufacturer:
1. The referenced "special venting system" instructions shall be included with the appliance or equipment installation instructions; and
2. The "special venting systems" shall be Product Approved by the Board, and the instructions for that system shall include a parts list and
detailed installation instructions.
(e) A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all venting instructions,
all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of
the installation.
MA Code - CO Detector
(for the State of Massachusetts only)

HZ42ST Regency HorizonTM Gas Fireplace
6
INSTALLATION
DIMENSIONS
UNIT DIMENSIONS
18-7/8”
479mm
15”
381mm
36-1/2”
927mm
12-7/8”
327mm
1-1/2”
38mm
36”
914mm
48-3/4”
1238mm
30-13/16”
783mm
41-3/16”
1046mm
3”
76mm
1-1/2”
38mm
48-11/16”
1237mm
23-5/8”
600mm
28-5/8”
727mm
12”
305mm
½”
13mm
21-5/8”
549mm

HZ42ST Regency HorizonTM Gas Fireplace 7
INSTALLATION
10) Beawareofelectricalwiringlocationsinwalls
and ceilings when cutting holes for termina-
tion.
11) Undernocircumstancesshouldthisappliance
be modified. Parts that have to be removed
for servicing should be replaced prior to
operating this appliance.
12) Installation and any repairs to this appliance
should be done by an authorized service
person.Aprofessionalservicepersonshould
be called to inspect this appliance annually.
Make it a practice to have all of your gas
appliances checked annually.
13) Do not slam shut or strike the glass door.
14) Under no circumstances should any solid
fuels (wood, paper, cardboard, coal, etc.) be
used in this appliance.
15) The appliance area must be kept clear and
free of combustible materials, (gases and
other flammable vapours and liquids).
Emissions from burning wood or gas could
contain chemicals known to the State of
California to cause cancer, birth defects or
other reproductive harm.
INSTALLATION
IMPORTANT MESSAGE
SAVE THESE
INSTRUCTIONS
The HZ42 ST Direct Vent Fireplace must be
installed in accordance with these instructions.
Carefullyread alltheinstructionsin thismanual
first.Consultthe"authorityhavingjurisdiction"to
determinethe need for apermit priortostarting
the installation. It is the responsibility of the
installer to ensure this fireplace is installed in
compliancewithmanufacturersinstructionsand
all applicable codes.
BEFORE YOU START
Safeinstallationandoperationofthisappliance
requires common sense, however, we are
required by the Canadian Safety Standards
and ANSI Standards to make you aware of
the following:
YOUNG CHILDREN SHOULD BE
CAREFULLY SUPERVISED WHEN
THEY ARE IN THE SAME ROOM AS
THE APPLIANCE.
CLOTHINGOROTHERFLAMMABLE
MATERIALSHOULDNOTBEPLACED
ON OR NEAR THE APPLIANCE.
INSTALLATION AND REPAIR SHOULD
BE DONE BY AN AUTHORIZED
SERVICE PERSON. THE APPLIANCE
SHOULD BE INSPECTED BEFORE
USE AND AT LEAST ANNUALLY BY A
PROFESSIONAL SERVICE PERSON.
MORE FREQUENT CLEANING MAY
BE REQUIRED DUE TO EXCESSIVE
LINT FROM CARPETING, BEDDING
MATERIAL, ETC. IT IS IMPERATIVE
THAT CONTROL COMPARTMENTS,
BURNERS AND CIRCULATING AIR
PASSAGEWAYS OF THE APPLIANCE
BE KEPT CLEAN.
DUE TO HIGH TEMPERATURES, THE
APPLIANCE SHOULD BE LOCATED
OUT OF TRAFFIC AND AWAY FROM
FURNITURE AND DRAPERIES.
WARNING: FAILURE TO INSTALLTHIS
APPLIANCE CORRECTLY WILL VOID
YOUR WARRANTY AND MAY CAUSE
A SERIOUS HOUSE FIRE.
CHILDREN AND ADULTS SHOULD BE
ALERTED TO THE HAZARDS OF HIGH
SURFACE TEMPERATURES, ESPE-
CIALLY THE FIREPLACE GLASS, AND
SHOULDSTAYAWAYTOAVOIDBURNS
OR CLOTHING IGNITION.
GENERAL SAFETY
INFORMATION
1) The appliance installation must conform
with local codes or, in the absence of local
codes,withthecurrentCanadianorNational
Gas Codes, CAN1-B149 or ANSI Z223.1
Installation Codes.
2) Theappliancewheninstalled,mustbeelec-
trically grounded in accordance with local
codes,orintheabsenceoflocalcodeswith
the current National Electrical Code,ANSI/
NFPA70 or CSAC22.1CanadianElectrical
Code.
3) See general construction and assembly
instructions.Theapplianceandventshould
be enclosed.
4) This appliance must be connected to the
specified vent and termination cap to the
outsideofthebuildingenvelope.Nevervent
to another room or inside a building. Make
sure that the vent is fitted as per Venting
instructions.
5) Inspect the venting system annually for
blockage and any signs of deterioration.
6) Venting terminalsshallnotberecessedinto
a wall or siding.
7) Anysafetyglassremovedforservicingmust
bereplacedpriortooperatingtheappliance.
8) To prevent injury, do not allow anyone who
is unfamiliar with the operation to use the
fireplace.
9) Wearglovesandsafetyglassesforprotection
while doing required maintenance.

HZ42ST Regency HorizonTM Gas Fireplace
8
INSTALLATION
INSTALLATION
This includes:
1) Clockingtheappliancetoensurethecorrect
firing rate (rate noted on label 26,000 Btu/h
(NG),afterburningappliancefor15minutes.
2) Ifrequired,adjustingtheprimaryairtoensure
that the flame does not carbon. First allow
the unit to burn for 15-20 min. to stabilize.
CAUTION: Any alteration to the product that
causes sooting or carboning that results
in damage is not the responsibility of the
manufacturer.
INSTALLATION
CHECKLIST
1) Locate appliance
a) Room location (Refer to "Locating Your
Gas fireplace" section)
b) Clearances to Combustibles (Refer to
"Clearances" section)
c) Mantle Clearances (Refer to "Mantel
Clearances" section)
d) Framing & Finishing Requirements
(Refer to "Framing & Finishing" section)
e) VentingRequirements(Referto"Venting"
section)
2) Assemble Top and Side Standoffs (Refer to
"Unit Assembly Prior to Installation).
3) Slide unit into place.
4) Installvent(Referto"Venting Arrangement"
sections).
5) Make gas connections (Refer to "Gas Line
Installation section).
6) Make electrical connections to receptacle
supplied with unit (recommended).
7) Install 1 AA battery into DC spark box.
8) Test the pilot (Refer to "Pilot Adjustment"
section).
9) TestGasPressure(Referto"GasPipePres-
sure Testing" section).
10) Installstandardandoptionalfeatures. Refer
to the following sections:
a) Optional Accent Light Installation
b) Glass Crystals/ Optional Ceramic
Stones
c) Optional Firebox Base Pebbles
d) Optional Reflective Panels
e) Faceplate
f) Remote Control or Wall Thermostat
11) Wall Mounted ON/OFF Switch:
Use the toggle wall switch supplied with the
manual package. Use of a “decor” switch
causeshigherresistancewhichisaproblem
on gas fireplaces.
12) Final check.
Before leaving this unit with the customer, the
installer must ensure that the appliance is firing
correctly and operation fully explained to
customer.
LOCATING YOUR
GAS FIREPLACE
1) Whenselectinga location for your fireplace,
ensure that the clearances are met as
outlined in the "Clearances" section.
2) Provide adequate clearances for servicing.
3) The appliance must be installed on a flat,
solid, continuous surface (e.g. wood, metal,
concrete).Thismaybethefloor,orraisedup
on a platform to enhance its visual impact.
If the appliance is going to be installed
on carpeting, combustible linoleum tile or
other combustible material other than wood
flooring,theappliancemustbeinstalledona
metalor wood panel extending thefullwidth
and depth of the appliance.
4) The Direct Vent Gas Fireplace can be
installed as follows:
Model # Position
A) HZ42: See Thru
B) HZ42: See Thru
5) This appliance is Listed for bedroom
installationswhenusedwithaListedMillivolt
Thermostat. Some areas may have further
requirements, check local codes before
installation.
6) The HZ42 ST Direct Vent Gas Fireplace is
approvedforalcoveinstallations,whichmeet
the clearances listed on this page.
7) Werecommendthatyouplanyourinstallation
on paper using exact measurements for
clearances and floor protection before
actually installing this appliance. Have a
qualifiedinspector,dealer,orinstallerreview
your plans before installation.
Note: For Exterior Vent Termination
Locations see section "Exterior Vent
Termination Locations."
Glass
36" min.
(914mm)
36" min.
(914mm)
4-1/2” min. (114mm)
Glass
A
B
36"min.
(914mm) 36"min.
(914mm)
36"min. walkway (914mm)
Glass Glass
HZ42 ST - SEE THRU
HZ42 ST - SEE THRU

HZ42ST Regency HorizonTM Gas Fireplace 9
INSTALLATION
INSTALLATION
Caution Requirements
The top, back and sides of the fireplace are defined by
standoffs. The metal ends of the standoff may NOT be
recessed into combustible construction.
WARNING
Fire hazard is an extreme risk
if these clearances (air space) to combustible materials are not
adhered to. It is of greatest importance that this fireplace and vent
system be installed only in accordance with these instructions.
CLEARANCES
The clearances listed below are Minimum distances unless otherwise stated:
A major cause of chimney related fires is failure to maintain required clearances (air space) to combustible materials. It is of the greatest
importance that this fireplace and vent system be installed only in accordance with these instructions.
F
B
C
Installed Close
to Ceiling
NON-COMBUSTIBLE REQUIREMENTS
Flue Clearances to Combustibles
Horizontal - Top 3"
Horiztonal - Side 2"
Horiztonal - Bottom 2"
Vertical 2"
Passing through wall/
floor/ceiling - when
firestop is used. 1-1/2"
F
B
E
D
A
Installed Close
to Floor
G
Clearance: Dimension Measured From:
A: Mantel Height (min.) 13" (330mm) Top of Fireplace Opening
B: Sidewall (on one side) 8" (203mm) Side of Fireplace Opening
C: Ceiling
(room and/or alcove) 22" (559mm) Top of Fireplace Opening
D: Mantel Depth (max.) 13" (330mm) 22" Above Fireplace Opening
E: Alcove Width 84" (2134mm) Sidewall to Sidewall (Minimum)
F: Alcove Depth 36" (914mm) Front to Back Wall (Maximum)
G: Finished Floor 25-3/4" (654mm) Top of Fireplace Opening
Note 0" (0mm) No Hearth Required
38 -3/4" (984mm)
6-½"
(165mm)
25-3/4”
(654mm)
13"
(330mm)
57" (1448mm)
Non-combustible
Material
Non-combustible Material
Non-combustible Material
Metal Stud (header)
on edge
Metal Stud
on edge
Metal Stud
on edge
21-1/4”
41-1/8”
Non-combustible material
always wider at vent end
Note:
9-1/2”
(241mm)
Non-combustible Material
4-3/8”
(111mm)
Vent End

HZ42ST Regency HorizonTM Gas Fireplace
10
INSTALLATION
MANTEL CLEARANCES
Note: Ensurethepaintthatisusedonthemantel
and the facing is "heat resistant" or the
paint may discolour.
MANTEL LEG CLEARANCES
Combustible mantel leg clearances as per diagram:
4"
Allowable mantel
leg projection
1.5" (38mm)
9-1/2”(241mm)
Non-Combustible
7”
4"
1.5" (38mm)
MANTEL LEG
9-1/2”(241mm)
Non-Combustible
7”
4"
Allowable mantel
leg projection
1.5" (38mm)
MANTEL LEG
7”
4"
7”
1.5" (38mm)
9-1/2” (241mm)
16.5” (419mm)
Allowable mantel
leg projection
Allowable mantel
leg projection
9-1/2” (241mm)
13.5” (343mm)
16.5” (419mm)
13.5” (343mm)
16.5” (419mm)
13.5” (343mm)
9-1/2” (241mm)
9-1/2” (241mm)
13.5” (343mm)
16.5” (419mm)
2
0
12 64
810
Top of
Fireplace
Opening
0
14
To Unit
Base
1" (25mm)
22”
13”
25-3/4”
10
20
26
Combustible Material
2
0
12 64
810
Top of
Fireplace
Opening
Standoff
Metal Stud
(On Edge)
0
14
Non-combustible
Facing
1" (25mm)
13”
10
20
26
2
0
12
6
4
8 10
Top of
Fireplace
Opening
12" (305mm)
0
14
To Unit
Base
1" (25mm) 21-1/2”
13”
25-3/4”
10
20
26
12" (305mm)
21-1/2”
Due to the extreme heat this fireplace emits, the
mantelclearancesarecritical.Combustiblemantel
clearances from top of front facing are shown in the
diagram on the right.
Note: A non-combustible mantel may be
installed at a lower height if the framing
is made of metal studs covered with a
non-combustible board.
INSTALLATION

HZ42ST Regency HorizonTM Gas Fireplace 11
INSTALLATION
HORIZONTAL VENT DEFLECTOR INSTALLATION
NAILING STRIPS
The side, top and bottom nailing strips come attached to the unit. There
are 3 plates on each side and 2 on the bottom - 8 in total. They can be
foldedoutasrequired. Thebottomnailingstripissecuredtotheunfinished
floor - if installing the unit directly on the floor.
Note: This installation is only required for horizontal terminations.
If any rise is used when venting this unit - the deflector and
extender are not required.
1) The deflector and extender are shipped on top of the firebox.
Slide the deflector out from under the nailing strip and lift the
extender up off the nailing strip.
2) Remove the 3 screws near the vent outlet on the firebox - as shown
below.
3) Install the deflector near the vent outlet - secure with the same
3 screws. Ensure flange on deflector is facing downward.
4) Install the extender on top of the deflector with 2 screws -
slide the extender until it touches the outside wall - tighten
screws to secure. Extender can be adjusted to max. 15-1/2".
Nailing Strips
Standoff
UNIT ASSEMBLY
PRIOR TO
INSTALLATION
TheStandoffsandNailingStripsmustbecorrectlypositionedandattached
to the firebox before unit is slid into position.
STANDOFF ASSEMBLY
The side, top and rear standoffs are shipped in a flat position and must
be folded into shape and attached.
1) Remove the standoffs from the fireplace.
2) Take each standoff and bend into the correct shape. Bend up at the
bend lines until the screw holes in the standoff and the pre-punched
screw holes on the fireplace side line up.
3) Attach the standoff securely to the side with 2 screws per standoff (on
opposite corners).
Nailing Strips shown folded out.
IMPORTANT NOTE
Framing depth measurement is noted with the
side & top nailing strips set as far forward on
the firebox as possible. The nailing strips can
be adjusted back up to 1” to allow for varying
thicknesses in non-combustible material & wall
finishes.
INSTALLATION
Deflector extender Deflector
Flange

HZ42ST Regency HorizonTM Gas Fireplace
12
INSTALLATION
INSTALLATION
Note: When constructing the framed opening, please ensure there
is access to install the gas lines when the unit is installed.
2) The unit does not have to be completely enclosed in a chase. You
mustmaintain clearances fromtheventto combustiblematerials:See
"Clearances" section. Combustible materials can be laid against the
side and back standoffs and the stove base.
3) Non-combustiblematerial(ie.tile,slate,etc)maybebroughtuptoand
overlap the unit (top and bottom) ensuring that the maximum thick-
ness does not go beyond the 1-1/2" as shown in the diagram below.
The faceplate will not be able to be mounted if the finished material
is beyond 1-1/2".
FRAMING & FINISHING
1) Frame in the enclosure for the unit with framing material.
IMPORTANT: Vertical studs and the header must be metal.
Note:
Depending on the material used for finishing, the nailing strips must be
set accordingly so that the finished material is always at the 1-1/2" edge
of the flange.
4) If material such as brick, stone, etc. extends past the faceplate depth,
when finishing around the faceplate, the minimum opening dimen-
sions noted below must be adhered to ensuring for the removal of the
faceplate and for the safe operation of this appliance.
Finished
Material Nailing Strip Position
1/2" 1"
1" 1/2"
1-1/2" 0" (flush)
Unit
Nailing Strip
1” Forward
Unit
Nailing Strip
½” Forward
Unit
Nailing Strip
Flush w/unit
Factory Set

HZ42ST Regency HorizonTM Gas Fireplace 13
INSTALLATION
INSTALLATION
FRAMING DIMENSIONS
HZ42ST Framing Dimensions
A * Framing Depth * 15" (381mm)
**minus 2x the finished material thickness
B Framing Height 36-3/4" (933mm)
C Framing Width 50" (1270mm) Horizontal or Vertical Vent
D Gas Connection Height 4-1/2" (114mm)
E Gas Connection Inset 2-7/8" (73mm)
F Gas Connection Opening Width 4-5/8" (117mm)
G Gas Connection Opening Height 2" (51mm)
* Framing depth measurement is noted with nailing strips (top & sides) set as far forward on the firebox
as possible. The nailing strips can be adjusted back up to 1" (on both sides) to allow for varying
thicknesses in non-combustible material and wall finishes.
**Finished material thickness includes: non combustible material, tile slate, etc.
(example framing = 13" - if 1" thick finishing material is used on both sides)
B
C
All studs
are metal
(on edge)
A
Finished
Floor
Note: All studs on top and sides of unit must be on edge.
Note: Gas hookup is on vent side of unit.

HZ42ST Regency HorizonTM Gas Fireplace
14
INSTALLATION
INSTALLATION
Vent restriction is required for certain venting installations, see the diagrams in the "Venting
Arrangements" section to determine if they are required for your installation.
The Vent Restrictor plate is located on the inside top of the firebox.
To set the vent restriction as indicated in the venting arrangements diagrams, refer to the following instructions;
1) Remove the glass door.
2) Remove the screws that hold the vent restrictor plate in place.
3) Adjust the vent restrictor plate to the required vent restrictor position as per the diagrams shown.
4) Once the vent restrictor plate is in the required position, secure with screws.
VENT RESTRICTOR POSITION
3/4” 1-1/4” 2-1/2” 3”
SET 0
FACTORY SET
THIS HOLE SETS THE
VENT RESTRICTOR
AT 3”
SET 1
THIS HOLE SETS THE
VENT RESTRICTOR
AT 2-1/2”
SET 2
THIS HOLE SETS THE
VENT RESTRICTOR
AT 1-1/4”
SET 3
THIS HOLE SETS THE
VENT RESTRICTOR
AT 3/4”

HZ42ST Regency HorizonTM Gas Fireplace 15
INSTALLATION
EXTERIOR VENT TERMINATION REQUIREMENTS
Minimum Clearance Requirements Canada1USA2
AClearance above grade, veranda, porch, deck, or balcony 12"(30cm) 12"(30cm)
BClearance to window or door that may be opened 12"(30cm) 9" (23cm)
CClearance to permanently closed window **
DVertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (61cm)
from the center line of the terminal (check with the local code)
18"(46cm) 18"(46cm)
EClearance to unventilated soffit 19"(48cm) 19"(48cm)
FClearance to outside corner: with AstroCap Termination Cap. 7"(18cm) 7"(18cm)
Clearance to outside corner: with all other approved Termination Caps. 13"(33cm) 13"(33cm)
GClearance to inside corner: with AstroCap Termination Cap 7"(18cm) 7"(18cm)
Clearance to inside corner: with all other approved Termination Caps. 13"(33cm) 13"(33cm)
HClearance to each side of center line extended above meter/regulator assembly 36"(90cm)a*
JClearance to service regulator vent outlet 36"(90cm) *
KClearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance 12"(30cm) 9" (23cm)
LClearance to a mechanical air supply inlet #3' (91cm) above if within 10' (3m) horizontally. 72"(1.8m) 36"(90cm)b
MClearance above paved sidewalk or a paved driveway located on public property 84"(2.1m)┼*
NClearance under veranda, porch, deck, or balcony 12"(30cm)‡*
1In accordance with current CSA B149.1, Natural Gas and Propane Installation Code
2In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
┼A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor
*Clearance in accordance with local installation codes and the requirements of the gas supplier
a3 feet (91cm) within a height of 15 feet (4.5m) above the meter / regulator assembly
b3 feet (91cm) above - if within 10 feet (3m) horizontally
INSTALLATION

HZ42ST Regency HorizonTM Gas Fireplace
16
INSTALLATION
INSTALLATION
4” X 6-5/8” RIGID PIPE CROSS REFERENCE CHART
Components from different Manufacturers may not be mixed. Not All Rigid Pipe components are available directly from FPI.
Description Simpson
Direct Vent Pro®
Selkirk
Direct Temp™
American Metal
Products®
Amerivent Direct
Metal-Fab™
Sure Seal
Security
Secure- Vent®
ICC Excel
Direct
6” Pipe Length-Galvanized 46DVA-06 4DT-6 N/A 4D6 SV4L6 TC-4DL6
6” Pipe Length-Black 46DVA-06B 4DT-6B N/A 4D6B SV4LB6 TC-4DL6B
7” Pipe Length-Galvanized N/A N/A 4D7 N/A N/A N/A
7” Pipe Length-Black N/A N/A 4D7B N/A N/A N/A
9” Pipe Length-Galvanized 46DVA-09 4DT-9 N/A N/A N/A N/A
9” Pipe Length-Black 46DVA-09B 4DT-9B N/A N/A N/A N/A
12” Pipe Length-Galvanized 46DVA-12 4DT-12 4D12 4D12 SV4L12 TC-4DL1
12” Pipe Length-Black 46DVA-12B 4DT-12B 4D12B 4D12B SV4LB12 TC-4DL1B
18” Pipe Length-Galvanized 46DVA-18 4DT-18 4D18 4D18 SV4LA TC-4DL18
18” Pipe Length-Black 46DVA-18B 4DT-18B 4D18B 4D18B SV4LA TC-4DL18B
24” Pipe Length-Galvanized 46DVA-24 4DT-24 4D24 4D24 SV4L24 TC-4DL2
24” Pipe Length-Black 46DVA-24B 4DT-24B 4D24B 4D24B SV4LB24 TC-4DL2B
36” Pipe Length-Galvanized 46DVA-36 4DT-36 4D36 4D36 SV4L36 TC-4DL3
36” Pipe Length-Black 46DVA-36B 4DT-36B 4D36B 4D36B SV4LB36 TC-4DL3B
48” Pipe Length-Galvanized 46DVA-48 4DT-48 4D48 4D48 SV4L48 TC-4DL4
48” Pipe Length-Black 46DVA-48B 4DT-48B 4D48B 4D48B SV4LB48 TC-4DL4B
60” Pipe Length-Galvanized 46DVA-60 4DT-60 N/A N/A N/A N/A
60” Pipe Length-Black 46DVA-60B 4DT-60B N/A N/A N/A N/A
Adjustable Length 3”-10”-Galvanized N/A N/A N/A 4DAL N/A TC-4DLT
Adjustable Length 3”-10”-Black N/A N/A N/A 4DALB N/A TC-4DLTB
Adjustable Length 7”-Galvanized N/A N/A 4D7A N/A N/A N/A
Adjustable Length 7”-Black N/A N/A 4D7AB N/A N/A N/A
Extension Pipe 8-1/2”-Galvanized 46DVA-08A N/A N/A N/A N/A N/A
Extension Pipe 8-1/2”-Black 46DVA-08AB N/A N/A N/A N/A N/A
Adjustable Length 12”-Galvanized N/A N/A 4D12A N/A SV4LA12 N/A
Adjustable Length 12”-Black N/A N/A 4D12A N/A SV4LBA12 N/A
Extension Pipe 16”-Galvanized 46DVA-16A N/A N/A N/A N/A N/A
Extension Pipe 16”-Black 46DVA-16AB N/A N/A N/A N/A N/A
45ºElbow-Galvanized 46DVA-E45 4DT-EL45 4D45L N/A N/A TE-4DE45
45ºElbow-Black 46DVA-E45B 4DT-EL45B 4DT-EL45B N/A N/A TE-4DE45B
45ºElbow Swivel-Galvanized See 46DVA-E45 N/A N/A 4D45L SV4E45 N/A
45ºElbow Swivel-Black See 46DVA-E45B N/A N/A 4D45LB SV4EB45 N/A
90ºElbow-Galvanized 46DVA-E90 4DT-EL90S 4DT-EL90S N/A N/A TE-4DE90
90ºElbow-Black 46DVA-E90B 4DT-EL90SB 4DT-EL90SB N/A SV4EBR90-1 TE-4DE90B
90ºElbow, Swivel-Galvanized See 46DVA-E90 N/A N/A 4D90L SV4E90-1 N/A
90ºElbow, Swivel-Black See 46DVA-E90B N/A N/A 4D90LB SV4EB90-1 N/A
90º Starter Elbow, Swivel-Galvanized N/A N/A N/A 4D90A N/A N/A
Adaptor* N/A N/A N/A 4D90L N/A N/A
Ceiling Support N/A 4DT-CS 4DFSP 4DSP SV4SD TE-4DE45
Cathedral Support Box 46DVA-CS 4DT-CSS 4DRSB 4DRS SV4CSB TE-4DE45B
Wall Support/Band 46DVA-WS 4DT-WS/B 4DWS 4DWS SV4BM N/A
Offset Support 46DVA-ES (N/A - FPI) 4DT-OS N/A N/A SV4SU N/A
Wall Thimble-Black 46DVA-WT 4DT-WT 4DWT 4DWT SV4RSM TE-4DE90
Wall Thimble Support/Ceiling Support 46DVA-DC N/A N/A N/A SV4PF TE-4DE90B
Firestop Spacer 46DVA-FS 4DT-FS 4DFSP 4DFS SV4BF N/A
Trim Plate-Black N/A 4DT-TP 4DFPB 4DCP SV4LA N/A

HZ42ST Regency HorizonTM Gas Fireplace 17
INSTALLATION
INSTALLATION
Description Simpson
Direct Vent Pro®
Selkirk
Direct Temp™
American Metal
Products®
Amerivent Direct
Metal-Fab™
Sure Seal
Security
Secure- Vent®
ICC Excel
Direct
Attic Insulation Shield 12” 46DVA-IS N/A@ FPI N/A 4DAIS12 N/A SV4RSA N/A
Attic Insulation Shield - Cold Climates 36” N/A N/A 4DAIS12 N/A N/A TM-4AS
High Wind Vertical Cap 46DVA-VCH N/A N/A N/A N/A TM-4VT
High Wind Horizontal Cap 46DVA-HC N/A N/A N/A N/A TM-4DHT
Horizontal Square Termination Cap See 46DVA-HC 4DT-HHC 4DHC 4DHT SV4CHC-1 TM-4HT
Vertical Termination Cap N/A 4DT-HVC 4DVC 4DVT SV4CGV-1 TM-4VT
Storm Collar 46DVA-08A 4DT-SC 4DSC 4DSC SV4FC TM-SC
Restrictor Disk 46DVA-RD N/A N/A N/A N/A TM-4DS
Extended Vertical Termination Cap 46DVA-VCE N/A N/A N/A N/A N/A
Chimney Conversion Kit A (USA only) 46DVA-KCA N/A N/A N/A N/A TM-4CA6
Chimney Conversion Kit B (USA only) 46DVA-KCB N/A N/A N/A N/A TM-4CA7
Chimney Conversion Kit C (USA only) 46DVA-KCC N/A N/A N/A N/A TM-4CA8
Chimney Conversion Kit Masonry
(USA only)
46DVA-KMC N/A N/A N/A N/A N/A
Wall Firestop 46DVA-WFS N/A N/A N/A N/A TM-4TR
Colinear Flex Connectors 46DVA-ADF N/A N/A N/A N/A N/A
Adjustable Flashing 0/12-6/12 N/A 4DT-ST14 4D12S 4DST14 SV4STC14 TF-4FA
Adjustable Flashing 6/12-12/12 N/A 4DT-ST36 4D36S 4DST36 SV4STC36 TF-4FB
Vinyl Siding Standoff 46DVA-VSS 4DT-VS N/A 4DVS SV4VS TM-VSS
Vinyl Siding Shield Plate N/A 4DT-VSP N/A N/A SV4VS N/A
Snorkel Termination 14” 46DVA-VCH N/A N/A N/A N/A TM-4ST14
Snorkel Termination 36” 46DVA-HC N/A N/A N/A N/A TM-4ST36
Basic Horizontal Termination Kit (A) Disc. 4DT-HKA 4DHTK2 4DHTKA SV-SHK N/A
Horizontal Termination Kit (B) 46DVA-KHA
(Changed Components)
4DT-HKB 4DHTK1 4DHTKB SV-HK N/A
Vertical Termination Kit Disc. 4DT-VKC 4DHTK 4DHTK SV-FK N/A
FPI
946-506/P Vent Guard (Optional) for AstroCap 946-205 Vinyl Siding Shield for Riser Vent Terminal
510-994 Rigid Pipe Adaptor (Must use with all rigid piping) 946-208/P Vent Guard (Optional) for Riser Vent Terminal
640-530/P Riser Vent Terminal 946-523/P AstroCap Horizontal Cap
946-605 Starter Collar Increaser 4” x 6-5/8” to 5” x 8” 946-206 Vinyl Siding Standoff for AstroCap
Note: When using Metal-Fab Sure Seal Rigid Piping - please note that the Adaptor (4DDA) must be used in conjunction with FPI Rigid Pipe Adaptor (510-994).
Note: Horizontal runs of vent must be level, or have a 1/4” rise for every 1 foot of run towards the termination.
Never allow the vent to run downward - this could cause high temperatures and may present a possible fire hazard.
Offset Pipe Selection: Use this table to determine offset pipe lengths.
Pipe Length
(L)
4” x 6-5/8” Venting For specific instructions on venting components - visit the
manufacturers website listed below.
Run (X) Rise (Y)
0” (0mm) 4-7/8” (124mm) 13-7/8” (340mm) Simpson Direct Vent Pro: www.duravent.com
6” (152mm) 8” (203mm) 16-1/2” (419mm) Selkirk Direct-Temp: www.selkirkcorp.com
9” (229mm) 10-1/8” (257mm) 18-5/8” (473mm) American Metal Products: www.americanmetalproducts.com
12” (305mm) 12-1/4” (311mm) 20-3/4” (527mm) Metal-Fab Sure Seal: www.mtlfab.com
24” (610mm) 20-5/8” (524mm) 29-1/8” (740mm) Security Secure Vent: www.securitychimneys.com
36” (914mm) 29” (737mm) 37-1/2” (953mm) Industrial Chimney Company: www.icc-rsf.com
48” (1219mm) 37-7/16” (951mm) 45-15/16” (1167mm)

HZ42ST Regency HorizonTM Gas Fireplace
18
INSTALLATION
INSTALLATION
VENTING INTRODUCTION
The HZ42 uses the "balanced flue" technology Co Axial system. The inner liner vents products of combustion to the outside while the outer liner
draws outside combustion air into the combustion chamber thereby eliminating the need to use heated room air for combustion and losing warm room
air up the chimney.
Note: These flue pipes must not be connected to any other appliance.
The gas appliance and vent system must be vented directly to the outside of the building, and never be attached to a chimney serving a separate solid
fuel or gas burning appliance. Each direct vent gas appliance must use it's own separate vent system. Common vent systems are prohibited.
VENTING ARRANGEMENTS
ALLOWABLE HORIZONTAL TERMINATIONS FOR HZ42 ST
The diagram shows all allowable combinations of vertical runs with horizontal terminations, using one 45ºand one 90º(two 45o elbows equal to one
90o) for direct horizontal runs with horizontal termination use only one 45ºelbow.
Note: Must use optional rigid pipe adapter (Part# 510-994) when using Rigid Pipe Venting Systems.
VENT RESTRICTOR SETTING:
Vent restrictor factory set, no adjustment required unless otherwise indicated.
Referto the"VentRestrictorPosition" sectionfordetailson howtochangethe ventrestrictorfromthe factorysettingofSet 0toSet1 orSet2ifrequired.
Note: Regency®Direct Vent System (Flex) is only approved for horizontal terminations.
• Maintain clearances to combustibles as listed in "Clearances" section
• Horizontal vent must be supported every 3 feet.
• Firestops are required at each floor level and whenever passing through a wall.
• A wall thimble is mandatory for all horizontal terminations due to high temperatures.
• Flex system can only be used up to 10 feet - otherwise rigid venting must be used.
Please note the minimum centerline for
basic install shown above.

HZ42ST Regency HorizonTM Gas Fireplace 19
INSTALLATION
INSTALLATION
Notes:
1) Liner sections should be continuous without any
joints or seams.
2) Only Flex pipe purchased from Regency®may be
used for Flex installations
3) Horizontal vent must be supported every 3 feet.
4) Regency®DirectVentSystem(Flex)isonlyapproved
for horizontal terminations.
5) Flex system can only be used up to a maximum
continuous vent length of up to 10 feet. If longer
runs are required, rigid pipe must be used.
FPI Kit # Length Contains:
#946-513 2 Feet 1) 6-5/8” flexible outer liner (Kit length)
2) 4” flexible inner liner (Kit length)
3) spring spacers
4) thimble
5) AstroCap termination cap
6) screws
7) tube of Mill Pac
8) plated screws
9) S.S. screws #8 x 1-1/2” drill point
#946-515 4 Feet
#946-516 10 Feet
HORIZONTAL TERMINATIONS
FLEX VENT 4" X 6-5/8"
These venting systems, in combination with the HZ42 Direct Vent Gas Fireplace, has been tested and listed as a direct vent heater system by
Warnock Hersey/ Intertek. The location of the termination cap must conform to the requirements in the Vent Terminal Locations diagram in "Exterior
Vent Termination Locations" section.
Regency®Direct Vent (Flex) System Termination Kits includes all the parts needed to install the HZ42 using a flexible vent.