Drolet DECO ALTO User manual

READ AND KEEP THIS MANUAL FOR REFERENCE
Printed in Canada 46317_IA
DECO ALTO
(DB03220 model)
Wood Stove
Owner's Manual
Part 2 of 2
INSTALLATION AND OPERATION
REQUIREMENTS
MOBILE
HOME
Safety tested according to ULC S627,
UL 1482 and UL 737 standards by an
accredited laboratory.
US Environmental Protection Agency
phase II certified wood stove compliant
with 2020 cord wood standard
CONTACT LOCAL BUILDING OR FIRE OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION INSPECTION REQUIREMENTS
IN LOCAL AREA.
READ THIS ENTIRE MANUAL BEFORE INSTALLATION AND USE OF THIS WOOD STOVE. FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVEN DEATH.
ENGLISH
2022-10-07

ONLINE WARRANTY REGISTRATION
If the unit requires repairs during the warranty period, proof of purchase must be provided.
The purchase invoice must be kept. The date indicated on it establishes the warranty period.
If it can not be provided, the warranty period will be determined by the date of manufacture of the
product. It is also highly recommended to register the warranty online at
https://www.drolet.ca/en/warranty/warranty-registration/
Registering the warranty will help to quickly find the information needed on the unit.
Dealer:
Installer:
Phone Number:
Serial Numbrer:

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Installation and Operation Requirements - Deco Alto
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TABLE OF CONTENTS
1. CERTIFICATION PLATE .......................................................................................................... 4
2. General Information ................................................................................................................ 5
2.1 Performances..................................................................................................................... 5
2.2 Specifications..................................................................................................................... 6
2.3 Dimensions ........................................................................................................................ 7
2.4 EPA Loading ...................................................................................................................... 9
3. Clearances to Combustible Material.................................................................................... 10
3.1 Clearances........................................................................................................................10
4. Floor Protection .................................................................................................................... 17
5. Reducing Wall and Ceiling Clearances Safely .................................................................... 18
5.1 Shield Construction Rules ..................................................................................................18
6. Installation of options on your product................................................................................ 21
6.1 Optional Fresh Air Intake Kit Installation ..............................................................................21
6.2 Optional Fire Screen Installation ........................................................................................22
6.3 Optional Blower And Thermodisc Installation.......................................................................23
6.4 Air Tubes And Baffle Installation..........................................................................................24
6.5 Mobile Home Installation ....................................................................................................26
7. Maintenance/Parts Replacement......................................................................................... 27
7.1 Replacement.....................................................................................................................27
7.2 Gasket..............................................................................................................................28
7.3 Door .................................................................................................................................28
8. Exploded Diagram and Parts List ........................................................................................ 31
DROLET LIMITED LIFETIME WARRANTY................................................................................. 34

Page 4 Installation and Operation Requirements - Deco Alto
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1. CERTIFICATION PLATE

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Installation and Operation Requirements - Deco Alto
ENGLISH
2. General Information
2.1 Performances
Values are as measured per test method, except for the recommended heating area, firebox volume,
maximum burn time and maximum heat output.
Model Deco Alto (DB03220)
Type of combustion Non-catalytic
Fuel Type Dry Cordwood
Recommended heating area (sq. ft..)1 500 to 2,100 ft2(47 to 195 m2)
Overall firebox volume22.4 ft3(0.068 m3)
Loading volume EPA 1.95 ft3(0.055 m3)
Maximum burn time18 hours
Maximum heat output (dry cordwood)3 75,000 BTU/h (22 kW)
Overall heat output rate (min. to max.)2 4 14,200 BTU/h to 44,500 BTU/h
(4.16 kW to 13.04 kW)
Average overall efficiency3
(Dry cordwood) 72 % (HHV)577 % (LHV)6
Optimum efficiency7 79 %
Optimum overall efficiency8 76 %
Average particulate emissions rate9 2.3 g/h (EPA / CSA B415.1-10)10
Average CO11 69 g/h
1Recommended heating area and maximum burn time may vary subject to location in home, chimney draft,heat loss factors, climate, fuel type
and other variables. The recommended heated area for a given appliance is dened by the manufacturer as its capacity to maintain a minimum
acceptable temperature in the designated area in case of a power failure.
2The overall rebox calculation is an approximation and is not intended to be used for loading. This volume includes a buffer zone to allow an easier
fuel insertion, prevent ash spillage and allow the air wash to work properly.
3The maximum heat output (dry cordwood) is based on a loading density varying between 15 lb/ft3and 20 lb/ft3. Other performances are based on
a fuel load prescribed by the standard. The specied loading density varies between 7 lb/ft³ and 12 lb/ft3. The moisture content is between 19%
and 25%.
4As measured per CSA B415.1-10 stack loss method.
5Higher Heating Value of the fuel.
6Lower Heating Value of the fuel.
7Optimum overall efciency at a specic burn rate (LHV).
8The optimum heat transfer efciency is for the low burn rate and represents the appliance's ability to convert the energy contained in the wood logs
into energy transferred to the room in the form of heat and does not take into account the chemical losses during combustion.
9This appliance is ofcially tested and certied by an independent agency.
10 Tested and certied in compliance with CFR 40 part 60, subpart AAA, section 60.534(a)(1(ii) and ASTM E3053-17. Based on ALT-125 sent by EPA on
February 28th, 2018.
11 Carbon monoxide.

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2.2 Specifications
Recommended log length 16 in (406 mm) east-west
Maximum log length1 20 in (508 mm) east-west
Flue outlet diameter 6 in (150 mm)
Recommended connector pipe diameter 6 in (150 mm)
Type of chimney ULC-S629, UL 103 HT (2100 °F)
Minimum chimney height 12 feet
Baffle material Vermiculite
Approved for alcove installation Yes
Approved for mobile home installation2 Yes
Type of door Simple, glass with steel frame
Type of glass Ceramic glass
Particulate emission standard3 EPA / CSA B415.1-10
USA standard (Safety) UL 1482, UL 737
Canada standard (Safety) ULC-S627
1North-south: ends of the logs visible, East-west: sides of the logs visible.
2 Mobile homes (Canada) or manufactured homes (USA): The US Department of Housing and Urban Development describes “manufactured homes”
better known as “mobile homes” as follows; buildings built on xed wheels and those transported on temporary wheels/axles and set on a permanent
foundation. In Canada, a mobile home is a dwelling for which the manufacture and assembly of each component is completed or substantially
completed prior to being moved to a site for installation on a foundation and connection to service facilities and which conforms to the CAN/CSA-
Z240 MH standard.
3Tested and certied in compliance with CFR 40 part 60, subpart AAA, section 60.534(a)(1(ii) and ASTM E3053-17. Based on ALT-125 sent by EPA
on February 28th, 2018.

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2.3 Dimensions
2.3.1 Stove Dimensions
22 3/4"
578mm
16 3/4"
425mm
10 1/4"
260mm
17 1/8"
435mm
12 1/8"
307mm
37 5/8"
955mm 39 3/4"
1009mm
21 3/8"
543mm
26 1/2"
674mm
7 3/8"
188mm
12 7/8"
325mm
25 5/8"
651mm
O
6"
153mm
Figure 1: Top View
22 3/4"
578mm
16 3/4"
425mm
10 1/4"
260mm
17 1/8"
435mm
12 1/8"
307mm
37 5/8"
955mm 39 3/4"
1009mm
21 3/8"
543mm
26 1/2"
674mm
7 3/8"
188mm
12 7/8"
325mm
25 5/8"
651mm
O6"
153mm
22 3/4"
578mm
16 3/4"
425mm
10 1/4"
260mm
17 1/8"
435mm
12 1/8"
307mm
37 5/8"
955mm 39 3/4"
1009mm
21 3/8"
543mm
26 1/2"
674mm
7 3/8"
188mm
12 7/8"
325mm
25 5/8"
651mm
O6"
153mm
Figure 2: Front View Figure 3: Side View

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2.3.2 Combustion Chamber Dimensions
21"
533mm
5/16"
8mm
3/16"
5mm
11 7/8"
303mm
16 1/2"
419mm
17 1/2"
444mm
9"
227mm
Figure 4: Door Opening
21"
533mm
5/16"
8mm
3/16"
5mm
11 7/8"
303mm
16 1/2"
419mm
17 1/2"
444mm
9"
227mm
21"
533mm
5/16"
8mm
3/16"
5mm
11 7/8"
303mm
16 1/2"
419mm
17 1/2"
444mm
9"
227mm
Figure 5: Front View - Combustion Chamber Figure 6: Side View - Combustion Chamber

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Installation and Operation Requirements - Deco Alto
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2.4 EPA Loading
The loading methods shown below are those that were used during emissions certification.
2.4.1 Air control
The air control is located underneath the ash shelf.
To open the air control, pull the air control handle
completely (High). This will increase the burn rate.
To close the air control, push the air control handle
completely (Low). This will decrease the burn rate.
2.4.2 High burn rate (primary air control open)
Open the air control completely. Place height small
pieces (2" x 2") of wood in the firebox crossing them
at the greatest possible angle. Criss cross 10 to 16
kindling wood pieces on the small pieces of wood in
three layers at the greatest possible angle. Tie knot
with five sheets of paper and place them on top of the
kindling wood. Light up the paper and let the door ajar
at 90° until all the kindling wood is on fire and the first
row of small pieces of wood is on fire too. Close the
door. When there is no more fire in the front of the firebox and there are only faint flames on the
wood in the back of the firebox, break ashes, level the coal bed and put five logs in the firebox.
Put 3 pieces on the coal bed, without air space between them. Leave one inch of air space
between the rear firebrick and the first piece. The two other pieces should be added on top of
the first 3, in an East-West configuration. Let the door ajar to leave a space of one inch on the
door handle’s side for 1 minute maximum and then close the door.
2.4.3 Medium and low burn rate
On a two inches thick coal bed that is still red, place three logs in an East-West orientation.
There should be air space between each log and between the logs and the bricks. The two other
pieces should be added on top of the first three, slightly angled of 20°. Let the door ajar at 90°
for approximately 5 min. Then, close the door with the primary air control open. Leave to burn
with the primary air control open for approximately 10 more minutes and then close the primary
air control completely for the low burn rate and halfway for the medium burn rate. For better
results, close the air control gradually from the closing of the door to the complete closing of
the air control

Page 10 Installation and Operation Requirements - Deco Alto
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3. Clearances to Combustible Material
The clearances shown in this section have been determined by tests according to procedures
set out in safety standards ULC S627 (Canada), UL 1482 (U.S.A.) and UL 737 (U.S.A.). When
the stove is installed so that its surfaces are at or beyond the minimum clearances specified,
combustible surfaces will not overheat under normal and even abnormal operating conditions.
No part of the stove or flue pipe may be located closer to combustibles than the minimum
clearance figures given.
Clearances may only be reduced by means approved by the regulatory authority.
The clearances to combustible walls may be slightly different in Canada and the U.S.A. and may
also differ depending on whether single or double wall flue pipe is used. Make sure to choose
the correct clearance for the stove location and type of flue pipe.
The clearances of the appliance and the flue pipes must be met individually, meaning the appliance
cannot be installed closer to the combustible materials than the single or double wall pipe allows.
For a safe way to reduce clearances refer to section"5. Reducing Wall and Ceiling Clearances Safely"
of this manual.
3.1 Clearances
APPLIANCE CLEARANCES WITH SINGLE
WALL PIPE CONNECTOR
APPLIANCE CLEARANCES WITH DOUBLE
WALL PIPE CONNECTOR
Canada USA Canada USA
A14 ½" (368 mm) 11" (279 mm) A6" (152 mm) 6" (152 mm)
B22" (559 mm) 22" (559 mm) B22" (559 mm) 22" (559 mm)
C12" (305 mm) 12" (305 mm) C12" (305 mm) 12" (305 mm)
If the above clearances are met, then the distances measured from the flue outlet will be:
DISTANCES1FROM PIPE CONNECTOR
WITH SINGLE WALL PIPE CONNECTOR
DISTANCESFROM PIPE CONNECTOR
WITH DOUBLE WALL PIPE CONNECTORE
Canada USA Canada USA
D18" (457 mm) 14 ½" (368 mm) D9 ¼" (235 mm) 9 ¼" (235 mm)
E31 ½" (800 mm) 31 ½" (800 mm) E31 ¼" (794 mm) 31 ¼" (794 mm)
F21 ¾" (552 mm) 21 ¾» (552 mm) F21 ½" (549 mm) 21 ½" (549 mm)
1The pipe distances listed in this table refer to the distances obtained when the stove is installed in accordance with the appliance clearances above
mentioned.

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A
B
E
D
CAN
48"
122 cm
US
36"
92 cm
48"
Flush
F
FC
Figure 7: Clearances - Top Figure 8: Clearances - Corner
84"
213 cm
Ve
Ho
N
Figure 9: Clearances - Side

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3.1.1 With Heat Shield AC027621
To reduce the clearances of an appliance using a single wall pipe connector, the use of a heat
shield certified with the single wall pipe connector to be used as close as 6" from combustible
materials must be used. Only in this case, the same clearances as a certified double wall pipe
connector can be used. Refer to the booklet in the screen options to obtain the dimensions to
be respected.
APPLIANCE CLEARANCES WITH DOUBLE
WALL PIPE CONNECTOR
DISTANCES2FROM DOUBLE WALL
PIPE CONNECTOR
Canada USA Canada USA
A3" (76 mm) 3" (76 mm) D6 ¼" (159 mm) 6 ¼" (159 mm)
B4" (102 mm) 4" (102 mm) E13 ¼" (337 mm) 13 ¼" (337 mm)
C3" (76 mm) 3" (76 mm) F12 ½" (318 mm) 12 ½" (318 mm)
A
B
E
D
CAN
48"
122 cm
US
36"
92 cm
48"
Flush
F
FC
If the clearance reduction is on the same side as the door handle, position the stove at
a minimum of 6 inches from the side wall (clearance B), otherwise it may be located at
the clearance shown in the table above.
1 Note that to reduce the clearances of an appliance using a single wall pipe connector, the use of a heat shield certied with the single wall pipe
connector to be used as close as 6" from combustible materials must be used. Only in this case, the same clearances as a certied double wall
pipe connector can be used.
2The pipe distances listed in this table refer to the distances obtained when the stove is installed in accordance with the appliance clearances above
mentioned.

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3.1.2 With Lowered Ceiling
APPLIANCE CLEARANCES WITH SINGLE
WALL PIPE CONNECTOR
Canada USA
A14 ½" (368 mm) 11" (279 mm)
B23" (584 mm) 23" (584 mm)
C12" (305 mm) 12" (305 mm)
L77" (196 cm) 77" (196 cm)
Ve
Ho
L
APPLIANCE CLEARANCES WITH DOUBLE
WALL PIPE CONNECTOR
Canada USA
A9" (229 mm) 9" (229 mm)
B23" (584 mm) 23" (584 mm)
C12" (305 mm) 12" (305 mm)
L77" (196 cm) 77" (196 cm)
If the above clearances are met, then the distances measured from the flue outlet will be:
DISTANCES1FROM PIPE CONNECTOR
WITH SINGLE WALL PIPE CONNECTOR
DISTANCES1FROM PIPE CONNECTOR
WITH DOUBLE WALL PIPE CONNECTOR
Canada USA Canada USA
D18" (457 mm) 14 ½" (368 mm) D12 ¼" (311 mm) 12 ¼" (311 mm)
E32 ½" (825 mm) 32 ½" (825 mm) E32 ¼" (819 mm) 32 ¼" (819 mm)
F21 ¾" (552 mm) 21 ¾" (552 mm) F21 ½" (549 mm) 21 ½" (549 mm)
1The pipe distances listed in this table refer to the distances obtained when the stove is installed in accordance with the appliance clearances above
mentioned.

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3.1.3 With Heat Shield AC02762 and Lowered Ceiling
To reduce the clearances of an appliance using a single wall pipe connector, the use of a heat
shield certified with the single wall pipe connector to be used as close as 6" from combustible
materials must be used. Only in this case, the same clearances as a certified double wall pipe
connector can be used. Refer to the booklet in the screen options to obtain the dimensions to
be respected.
APPLIANCE CLEARANCES WITH DOUBLE
WALL PIPE CONNECTOR
Canada USA
A5" (127 mm) 5" (127 mm)
B6" (152 mm) 6" (152 mm)
C5" (127 mm) 5" (127 mm)
L80" (203 cm) 80" (203 cm)
Ve
Ho
L
DISTANCES1FROM PIPE CONNECTOR
WITH DOUBLE WALL PIPE CONNECTOR
Canada USA
D8 ¼" (210 mm) 8 ¼" (210 mm)
E15 ¼" (387 mm) 15 ¼" (387 mm)
F14 ½" (368 mm) 14 ½" (368 mm)
A
B
E
D
CAN
48"
122 cm
US
36"
92 cm
48"
Flush
F
FC
If the clearance reduction is on the same side as the door handle, position the stove at
a minimum of 6 inches from the side wall (clearance B), otherwise it may be located at
the clearance shown in the table above.
1The pipe distances listed in this table refer to the distances obtained when the stove is installed in accordance with the appliance clearances above
mentioned.

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3.1.4 Inside a Combustible Alcove
See section 3.1 for the single wall pipe installation.
APPLIANCE CLEARANCES WITH DOUBLE
WALL PIPE CONNECTOR
Canada USA
A9" (229 mm) 9" (229 mm)
B23" (584 mm) 23" (584 mm)
K48" (122 cm) 36" (914 mm)
L77" (196 cm) 77" (196 cm)
Ve
Ho
L
DISTANCES1FROM PIPE CONNECTOR
WITH DOUBLE WALL PIPE CONNECTOR
Canada USA
D12 ¼" (311 mm) 12 ¼" (311 mm)
E32 ¼" (819 mm) 32 ¼" (819 mm) A
B
E
D
K
E
B
3.1.5 Mobile Home
It is strictly forbidden to install a unit with a single wall pipe in a mobile home.
APPLIANCE CLEARANCES WITH DOUBLE
WALL PIPE CONNECTOR
DISTANCES1FROM PIPE CONNECTOR
WITH DOUBLE WALL PIPE CONNECTOR
Canada USA Canada USA
A11" (279 mm) 11" (279 mm) D14 ¼" (362 mm) 14 ¼" (362 mm)
B24" (610 mm) 24" (610 mm) E33 ¼" (845 mm) 33 ¼" (845 mm)
C13" (330 mm) 13" (330 mm) F22 ½" (572 mm) 22 ½" (572 mm)
1The pipe distances listed in this table refer to the distances obtained when the stove is installed in accordance with the appliance clearances above
mentioned.

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3.1.6 Mobile Home With Heat Shield AC02762
It is strictly forbidden to install a unit with a single wall pipe in a mobile home.
APPLIANCE CLEARANCES WITH DOUBLE
WALL PIPE CONNECTOR
DISTANCES1FROM PIPE CONNECTOR
WITH DOUBLE WALL PIPE CONNECTOR
Canada USA Canada USA
A3" (76 mm) 3" (76 mm) D6 ¼" (159 mm) 6 ¼" (159 mm)
B6" (152 mm) 6" (152 mm) E15 ¼" (387 mm) 15 ¼" (387 mm)
C3" (76 mm) 3" (76 mm) F12 ½" (318 mm) 12 ½" (318 mm)
A
B
E
D
CAN
48"
122 cm
US
36"
92 cm
48"
Flush
1Les distances de tuyau listées dans ce tableau se réfèrent aux distances obtenues lorsque le poêle est installé en accord avec les dégagements
de l’appareil mentionnés ci-dessus.

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4. Floor Protection
This stove is designed to prevent the floor from overheating. However, it must be placed on a
non-flammable surface to protect the floor from hot embers that may fall during loading. The
floor protection must be a continuous, non combustible material, such as steel with a minimum
thickness of 0.015" (0.38 mm) or ceramic tiles sealed together with grout. Cement board, brick, or
any other approved or listed material suited for floor protection. No R factor required.
Any type of tile will require a continuous non combustible sheet beneath to prevent the possibility
of embers falling through to the combustible floor if cracks or separation should occur in the
finished surface. Check local codes for approved alternatives. No protection is required if the
unit is installed on a non-combustible floor (ex: concrete).
FLOOR PROTECTION
Canada1USA
G28" (203 mm) N/A
H8" (203 mm) N/A
I18" (457 mm)From
door opening
16" (406 mm)From
door opening
JN/A 8" (203 mm)
K41 ⅝" (1057 mm) 32 ¾" (832 mm)
N3N/A See note 3
S47 ⅜" (1203 mm) 37 ⅜" (949 mm)
T33 ½" (851 mm) 26 ½" (673 mm)
U41 ⅝" (1057 mm) 32 ¾" (832 mm)
V68 ¼" (1734 mm) 53 ¾" (1365 mm)
H
I
G
J
K
S
Figure 10: Floor Protection
U
T
V
84"
213 cm
Ve
Ho
N
1 In Canada, to comply with CSA B365, Installation Code for Solid-Fuel-Burning Appliances and Equipment, any combustible covering beneath the
appliance and/or within the area extending horizontally at least 450 mm (18 in) beyond the appliance on any side equipped with a door, and at least
200 mm (8 in) beyond the appliance on other sides, shall be protected by a continuous, durable, non-combustible pad that will ember protection. The
450 mm (18 in) ember protection required on any side with a door shall extend for the full width of the appliance plus the 200 mm (8 in) required
on each side of the appliance without a door. Where the appliance is installed less than 200 mm (8 in) from a wall, the ember pad need only extend
to the base of the wall. An ember pad shall not be placed on top of a carpet unless the pad is structurally supported to prevent displacement and
distortion.
2The oor protection at the back of the stove is limited to the stove’s required clearance if such clearance is smaller than 8 inches (203 mm).
3Only required under the horizontal section (Ho) of the connector. Must exceed each side of the connector by at least 2 inches (51 mm).

Page 18 Installation and Operation Requirements - Deco Alto
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5. Reducing Wall and Ceiling Clearances Safely
It is often desired to use as little space as possible when installing
a wood stove. To do this, it is possible to reduce the clearances
safely and install the stove closer to the walls by permanently
installing a heat shield between the stove and the flammable
material.
The rules for heat shields are sometimes complicated. Read
and apply the instructions carefully. Some regions may have
different regulations. Consult the local building code or contact
the fire department for restrictions, inspection and installation
requirements in the area.
Warning: To reduce the clearances of an appliance using a single wall pipe connector, the use of a heat
shield certified with the single wall pipe connector to be used as close as 6" from combustible materials
must be used. Only in this case, the same clearances as a certified double wall pipe connector can be
used. Refer to the booklet in the screen options to obtain the dimensions to be respected.
5.1 Shield Construction Rules
− Adhesives used in shield construction must not ignite or lose adhesive qualities at temperatures
likely to be encountered.
− Mounting hardware which extends from the shield surface into combustibles may be used only
at the edges of the shield.
− Mounting hardware must allow full vertical ventilation.
A) Minimum clearance between the appliance top and an unshielded combustible ceiling:
39 ⅜" (1000 mm)
B) Shield extension above the appliance: 20" (500 mm)
C) Minimum space behind the shield: 1" (25 mm). In Canada 7/8" (21 mm)
D) Clearance along the bottom of the shield: minimum 1" (25 mm) and maximum 3" (75 mm)
E) Minimum clearance along the top of the shield: 3" (75 mm)
F) Mounting hardware must not be located closer than 8" (200 mm) from the vertical centre line of
the appliance.
G) Edge clearance for ceiling shields to side and back walls: 3" (75 mm)
H) Shield extension beyond each side of the appliance: 18" (450 mm)

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Installation and Operation Requirements - Deco Alto
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Figure 11: Heat shield clearances Figure 12: Heat shield clearances
H
H
Figure 13: Heat shield clearances Figure 14: Heat shield clearances

Page 20 Installation and Operation Requirements - Deco Alto
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TYPE OF SHIELD
CLEARANCES MAY BE REDUCED BY
THESE PERCENTAGES
SIDES AND REAR TOP (CEILING)
CAN /
USA (%)
USA
MIN.
CAN /
USA (%)
USA
MIN.
Sheet metal, a minimum of 24 gauge (0.61 mm)
in thickness , spaced out at least 1" (25 mm)* by
non-combustible spacers 67 12"
(305 mm)
50 18"
(457 mm)
Ceramic tiles, or equivalent non-combustible
material, on non-combustible board spaced
out at least 1" (25 mm)* by non-combustible
spacers
50 18"
(457 mm)
33 24"
(610 mm)
Ceramic tiles, or equivalent non-combustible
material, on non-combustible board, with a
minimum of 24 gauge (0.61 mm) sheet metal
backing spaced out at least 1" (25 mm)* by
non-combustible spacers
67 12"
(305 mm)
50 24"
(610 mm)
Brick, spaced out at least 1" (25 mm)* by non-
combustible spacers
50 18"
(457 mm)
N/A N/A
Brick, with a minimum of 24 gauge (0.61 mm)
sheet metal backing, spaced out at least 1"
(25 mm)* by non-combustible spacers 67 12"
(305 mm)
N/A N/A
* In Canada this space can be ⅞" (21 mm)