Heatilator MEL36 User manual

1
Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
Installation and service of this replace should be
performed by qualied personnel. Hearth & Home
Technologies recommends NFI certied profes-
sionals, or technicians supervised by an
NFI certied professional.
WOODBURNING FIREPLACE
Manufactured Home Approved
Fire Risk.
WARNING
For use with solid wood fuel only.
Other fuels may overre and generate
poisonous gases (i.e. carbon monoxide).
Model(s):
Installation Manual
Installation and Fireplace Setup
WARNING
HOT SURFACES!
Glass and other surfaces are hot during
operation AND cool down.
Hot glass will cause burns.
• DO NOT touch glass until it is cooled
• NEVER allow children to touch glass
• Keep children away
• CAREFULLY SUPERVISE children in same room as
replace.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other ammable
materials.
• Keep clothing, furniture, draperies and other ammable
materials away.
INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.
MEL36
MEL42
NOTICE: DO NOT discard this manual!
• DO NOT store or use gasoline or other am-
mable vapors and liquids in the vicinity of this
or any other appliance.
• DO NOT overre. Overring will void your
warranty.
• Comply with all minimum clearances to com-
bustibles as specied. Failure to comply may
cause house re.
WARNING: If the information in these
instructions is not followed exactly, a re
or explosion may result causing property
damage, personal injury, or death.

2Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
Safety Alert Key:
• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.
• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.
• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE: Indicates practices which may cause damage to the replace or to property.
Table of Contents
1 Product Specic & Important Safety Information
A. Fireplace Certication 3
B. Non-Combustible Materials 3
C. Combustible Materials 3
2 Getting Started
A. Typical Fireplace System 4
B. Design and Installation Considerations 6
1. Selecting Fireplace Locations 6
2. Locating Fireplace & Chimney 6
C. Tools and Supplies Needed 6
D. Inspect Fireplace and Components 6
E. Fireplace System Requirements 6
3 Framing and Clearances
A. Fireplace Dimensions 7
B. Clearances 8
Minimum Clearances to Combustibles 8
C. Frame the Fireplace 9
D. Secure and Level the Fireplace 9
E. Protective Metal Hearth Strips 10
F. Install Outside Air Kit 10
4 Chimney and Termination Requirements
A. Chimney Requirements 11
B. Offsets/Returns 12
C. Termination Requirements 13
5 Chimney Installation
A. Typical Chimney System 14
B. Assemble Chimney Sections 15
C. Roof Penetration 15
D. Thimble Instalation 16
E. Install Ceiling Firestops 17
F. Install Attic Insulation Shield 18
G. Termination Cap Requirements 18
6 Finishing
A. Finishing Material 19
B. Hearth Extension, Building and Finishing 20
1.Hearth Extension 4” or more below replace
Opening 21
2. Hearth Extension less than 4” below replace 21
Opening
C. Non-Combustible Sealant Material 21
D. Mantel and Wall Projections 22
E. Sidewalls/Surrounds 23
7 Fireplace Setup
A. Gas Log/Lighter Provision 24
B. Wood Burning Inserts 24
8 Reference Materials
A. Chimney Components 25
B. Optional Components 27

This replace may be installed in manufactured homes,
except in sleeping rooms.
If installed with a gas log set, provisions for the National
Fuel Gas Code must be met.
This replace complies with the installation requirements
for HUD.
CAUTION! The structural integrity of the manufactured
home oor, wall, and celing/roof must be maintained.
Heatilator is a registered trademark of Hearth & Home
Technologies.
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Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
WARNING! Risk of Fire! Hearth & Home Technologies
disclaims any responsibility for, and the warranty and
agency listing will be voided by the following actions.
DO NOT:
• installoroperatedamagedreplace
• modifyreplace
• install other than as instructed by Hearth & Home
Technologies
• operate the fireplace without fully assembling all
components
• overre
• installunventedgaslogset
• installanycomponentnotapprovedbyHearth&Home
Technologies
• installpartsorcomponentsnotListedorapproved
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualied
installer, service agency or your dealer.
B. Non-Combustible Materials
• Materials which will not ignite and burn, composed of
any combination of the following:
- Steel - Iron
- Brick - Tile
- Concrete - Slate
- Glass - Plasters
• Materials reported as passing ASTM E 136, Standard
Test Method for Behavior of Materials, in a Vertical
Tube Furnace at 750° C
C. Combustible Materials
• Materials made of or surfaced with any of the following
materials:
- Wood - Compressed paper
- Plant bers - Plastic
- Plywood/OSB - Sheet rock (drywall)
• Any material that can ignite and burn; ame proofed or
not, plastered or un-plastered
1 Product Specic & Important Safety Information
A. Fireplace Certication
This replace system has been tested and listed in accor-
dance with UL 127 and ULC-S610 standards by Under-
writers Laboratories Inc. for installation and operation in
the United States and Canada.

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Non-combustible
roof flashing maintains
minimum clearance
around chimney
Additional lateral
support for chimney
above roof (or enclosed
in chase) if needed
Ceiling firestop
on floor of attic
Support straps
on rafter support
chimney (not shown)
Termination cap
Chimney penetrates roof
preferably without affecting
roof rafters
Offset & Return (with hanger straps)
Framing headed off
in ceiling joists
Enclosed space above
and around fireplace
Mantel and surround
Decorative facing
and trim
Hearth extension
Factory-built fireplace
Protective metal
hearth strip(s)
Outside
combustion air
Combustible framing/header
on top of V-shaped standoffs
Chimney system
Attic insulation shield or thimble
(not shown) must be used here to keep
insulation away from chimney
if attic is insulated
Storm Collar
Roof
Flashing
4Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
2 Getting Started
A. Typical Fireplace System
Figure 2.1 Typical Fireplace System *Glass doors not shown.
*Chimney Air Kit (not shown)
required in Canada

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Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
G
F
E
AC
Across a
corner
H
As a
room
divider
D
48 in.
(1219 mm)
minimum
A
Along a wall
A
B* 1/2 in. (13 mm) all
configurations
H
1/2 in. (13 mm) min. air
space from fireplace to
combustible materials.
Note:
* 8 in. (203 mm) extra space
included for outside air
connection. If outside air
duct has no bend, this
dimension may be reduced
as long as minimum
clearances are met.
Note: Measurements are FRAMING dimensions only and do
not include drywall either in the cavity or on the interior walls.
I
I
A B C D E F G H I
inches 42 50 67 7/ 8 59 1/ 2 34 14 48 21 1/ 2
mm 1067 1270 1724 1511 864 356 1219 546
inches 48 56 73 7/ 8 65 1/ 2 37 1/ 4 14 52 1/ 4 21 1/ 2
mm 1219 1422 1876 1664 946 356 1327 546
Model
12 in. (305 mm)
Minimum from FP
opening to any
perpendicular wall.
ME L36
ME L42
Figure 2.2 Fireplace Locations
NOTICE:
• Illustrationsandphotosreecttypicalinstallationsand
are FORDESIGNPURPOSESONLY.
• Illustrations/diagramsarenotdrawntoscale.
• Actualinstallation/appearancemayvaryduetoindividual
design preference.
• Hearth&HomeTechnologiesreservestherighttoalter
its products.
NOTICE: In addition to these framing dimensions, also
reference the following section:
• Clearances (Section 3).
B. Design and Installation Considerations
NOTICE: Check building codes prior to installation.
• Installation MUST comply with applicable local, regional,
state and national codes and regulations.
• Consult insurance carrier, local building inspector, re
ofcials or authorities having jurisdiction over restrictions,
installation inspection and permits.
• Before installing, determine the following:
- Where the replace is to be installed.
- The vent system conguration to be used.
- Gas supply piping.
- Electrical wiring.
- Framing and nishing details.
Note: A raised hearth extension built ush with the
replace opening or less than 4 in. (102 mm) below
the fireplace opening requires the fireplace be
installed on a non=combustible surface.
1. Selecting Fireplace Locations
This replace may be used as a room divider, installed
along a wall or across a corner. See Figure 2.2.
Locating the replace in a basement should be avoided.
Locating near frequently opened doors, central heat
outlets or returns, or other locations of considerable air
movement can affect the performance.
Outside air must be used for combustion. This replace
comes equipped with the necessary components. Con-
sideration should be given to these factors before decid-
ing on a location.

6Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
2. Locating Fireplace & Chimney
Location of the replace and chimney will affect perfor-
mance. To reduce spillage of combustion products into
the living space avoid:
• Install within the warm airspace enclosed by the building
envelope. This helps to produce more draft, especially
during lighting and die-down of the re.
• Penetrate the highest part of the roof. This minimizes
the effects of wind loading.
• Minimize the use of chimney offsets.
• Consider the replace location relative to oor and ceiling
and attic joists.
Negative pressure in the structure can cause spillage of
combustion products into the living space. To minimize
effects of negative pressure:
• Ensure adequate outdoor air for all combustion
appliances and exhaust equipment.
• Ensure furnace and air conditioning return vents are not
located in the immediate vicinity of the replace.
• Avoid installing the replace near doors, walkways or
small isolated spaces.
• Recessed lighting should be a “sealed can” design.
C. Tools and Supplies Needed
Before beginning the installation be sure the following
tools and building supplies are available:
Reciprocating saw Framing material
Pliers Non-combustible sealant
Hammer Gloves
Phillips screwdriver Framing square
Flat blade screwdriver Electric drill and bits
Plumb line Safety glasses
Level Tape measure
1/2-3/4 in. length, #6 or #8 self-drilling screws
Misc. screws and nails
D. Inspect Fireplace and Components
WARNING! Risk of Fire and/or Explosion! Damaged
parts could impair safe operation. DO NOT install dam-
aged,incompleteorsubstitutecomponents.Keepre-
place dry.
• Remove replace and components from packaging and
inspect for damage.
• Vent system components are shipped in separate
packages.
• Report to your dealer any parts damaged in shipment.
• Read all the instructions before starting the
installation. Follow these instructions carefully
during the installation to ensure maximum safety
and benet.
E. Fireplace System Requirements
The Heatilator replace system requirements consist of
the following:
• Fireplace
- Refractory (included with replace)
- Firescreen (included with replace)
- Grate (included with replace)
- Hearth Extension (required, sold separately)
- Glass Doors (included with replace)
• Outside Air System
- Air Inlet (included with replace)
- Flex (required, included with replace)
• Chimney System
- Chimney air kit (required in Canada, sold separately)
- Chimney termination cap (required, sold separately)
- MH Thimble Kit (required, sold separately)
• Non-combustible nish material

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Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
3 Framing and Clearances
A. Fireplace Dimensions
A
21 in.
(533 mm)
7.50 in.
(191 mm)
14.13 in.
(359 mm)
18.75 in.
(476 mm)
13.45 in.
(476 mm)
21 in.
(533 mm)
7.50 in.
(191 mm)
9.25 in.
(235 mm)
7.50 in.
(191 mm)
Gas
Knockout
Outside
Air
9.25 in.
(235 mm)
Gas
Knockout
7.50 in.
(191 mm)
39.50 in.
(1003 mm)
C
D
B
21.37 in.
(543 mm)
7.37 in.
(187 mm)
A B C D
in. 36 41 23.75 11.87
mm 914 1041 603 302
in. 42 47 29.75 14.87
mm 1067 1194 756 378
Model #
MEL36
MEL42
17.83 in.
(453 mm)
Figure 3.1 Fireplace Dimensions

8Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
B. Clearances
WARNING! Risk of Fire!
You must comply with all minimum air space clearances
tocombustiblesasspeciedinFigure3.2.DO NOT pack
required air spaces with insulation or other materials.
Framing or nishing material used on the front of, or in
frontof,thereplacecloserthantheminimumslistedmust
be constructed entirely of non-combustible materials (i.e.,
steel studs, concrete board, etc.). Failure to comply may
causere.
Figure 3.2 Clearances to Combustible Materials
Minimum Clearances to Combustibles
WITHIN ENCLOSURE AREA
Fireplace to backwall 1/2 in. (13 mm)
Fireplace to sidewall 1/2 in. (13 mm)
Top standoffs to header 0 in. (0 mm)
Door opening to sidewall 12 in. (305 mm)
MANTEL
Mantel minimum height 12 in. (25 mm) from
top of opening
Maximum mantel depth 12 in. (305 mm)
(roof)
(insulation)
0 in. to level
of standoffs
Thimble application shown
(ceiling)
(attic)
Storm Collar
Roof Flashing
1/2 in. (13 mm) to back &
sides of appliance
Must have 2 in. (51 mm)
minimum clearance
to header
0 in.
to floor
Shaded areas
represent
2 in. (51 mm) min.
air space clearance
required around pipe
Combustible Object
48 in.
1219 mm
Ceiling Firestop

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Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
B
C
A
2 in. (51 mm)
min. air space
clearance
from chimney.
Header MUST NOT be notched!
D
D = extra space needed for outside air connection.
If outside air duct has no bend, this dimension may be
reduced as long as minimum clearances are met.
Model A B* C** D
in. 42 21 1/ 2 39 3/ 4 8
mm 1067 546 1010 203
in. 48 21 1/ 2 39 3/ 4 8
mm 1219 546 1010 203
* If interior of chase will be drywalled, add the thickness to
this measurement.
** Adjust header height for a raised floor under fireplace.
ME L36
ME L42
C. Frame the Fireplace
NOTICE: Hearth extension design should be determined
before installation of replace.
Figure 3.3 shows a typical framing of the replace, assum-
ing combustible materials are used. All required clearanc-
es to combustibles around the replace must be adhered
to. See Figure 3.2. Any framing across the top of the re-
place must be above the level of the top standoffs.
The nished cavity depth must be no less than 21 1/2 in.
(546 mm) from the nished backwall to the outside of front
wall framing.
WARNING! Risk of Fire! Youmustcomplywithall
minimum air space clearances to combustibles. DO NOT
pack required air spaces with insulation or other materi-
als.
WARNING! Risk of Fire! Comply with all minimum clear-
ancesspecied.
• A minimum 1/2 in. (13 mm) air clearance must be
maintained at the back and sides of the fireplace
assembly.
• Chimneysectionsatanylevelrequirea2in.(51mm)
minimum air space clearance between the framing and
chimney section.
• ClearanceofRadiationShieldthimbletochimneyisset
at11/2in.(38mm)
CAUTION! RiskofCuts/Abrasions.Wearprotectivegloves
and safety glasses during installation. Sheet metal edges
are sharp.
WARNING! Risk of Fire! Prevent contact with sagging,
loose insulation.
• DO NOT install against vapor barriers or exposed
insulation.
• Secureinsulationandvaporbarriers.
• Provideminimumairspaceclearancesatthesidesand
backofthereplaceassembly.
D. Secure and Level the Fireplace
This replace may be placed on either a combustible or
noncombustible continuous at surface. Follow the instruc-
tions for framing in Section 3. Slide the replace into posi-
tion. Be sure to provide the minimum 1/2 in. air clearance
at the sides and back of the replace.
The replace should be positioned so the face of the non-
combustible material on the replace will be ush with the
face of the drywall on the walls.
Level the replace and shim as necessary.
The replace must be secured to the manufactured hous-
ing structure to prevent the replace from shifting during
transportation. This can be done by securing through the
nailing anges on the sides of the replace and tabs on the
bottom pan.
Figure 3.3 Framing the Fireplace
1/2 in.
(13 mm)
Fireplace must be set out
1/2 in. (13 mm) in front of
the face of the framing
material.
WARNING! Risk of Fire! Ahearthextensionbuiltush
withthereplaceopeningorlessthan4in.(102mm)
belowthereplaceopeningrequiresthereplacebe
installed on a non-combustible surface.
CAUTION! The structual integrity of the manufactured
housing oor, wall, ceiling and roof must be maintained.

10 Heatilator • MEL36, MEL42 Installation Manual • 4044-212 • Rev D • 01/06/15
Protective metal strips are placed 2 in. (51 mm) under the
front of the fireplace and must extend beyond the front
and sides of fireplace opening by 2 in. (51 mm).
1 in. (25 mm)
overlap
Raised Platform
Floor
2 in.
(51 mm)
1 in. (25 mm) min.
overlap
2 in.
(51 mm)
Top piece must overlap
bottom piece
Figure 3.5 Protect the Front of an Elevated Platform
E. Protective Metal Hearth Strips
Figure 3.4 Position the Protective Metal Hearth Strips
• Locate the two protective metal hearth strips measuring
approximately 26 in. x 4 in. (660 mm x 102 mm) included
with this replace.
• Slide each metal strip 2 in. (51 mm) under front edge of
replace.
• Overlap strips in the middle of replace opening by 1 in.
(25 mm) minimum.
• Metal strips must extend beyond the front and sides
of the replace opening by at least 2 in. (51 mm),
Figure 3.4).
• Protect the front of a platform elevated above the hearth
extension with metal strips (not included with replace)
per Figure 3.5. See Section 7 for hearth extension
instructions.
WARNING! Risk of Fire! Protective metal hearth
strips MUST be installed on combustible surfaces. DO
NOT cover metal strips with combustible materials.
Sparksorembersmayigniteooring.
• Hearth extensions MUST be installed exactly as
specied.
Figure 3.6 Outside Air Installation
Outside Air
Plate
Assembly
2 Zip Ties
*Flexible Duct
(
((
(
(
(
(
(
)
)
)))
F. Install Outside Air Kit
• Outside air kit is required in a manufactured housing
replace installation.
• Keep duct runs short and straight to minimize restriction.
• A small dip is acceptable for a cold air trap.
• The outside air kit must be installed on the left side of
the replace.
• The inlet tube assembly provided can be installed
through the oor into a ventilated crawl space as shown
in Figure 3.6.
• An outside air hood is available to install through the side
of the house.
• The air duct may be run vertically terminate and at least
3ft. (.91m) below the top of the uppermost chimney
section.
CAUTION! Risk of Fire or Asphyxiation! DO NOT
drawoutsidecombustionairfromwall,oororceiling
cavity, or enclosed spaces such as an attic or garage.
 • DO NOT place outside air hood close to exhaust
vents or chimneys. Fumes or odor could be drawn
intotheroomthroughthereplace.
 • Locateoutsideairinlettopreventblockagefrom
leaves,snow/ice,orotherdebris.Blockages could
cause combustion air starvation.
*Use UL181 Class O or Class 1 rigid or exible duct-
ing.