HEI150 Wood Insert Fireplace Installation and Operation Manual
44
8.5.3 Table of Clearance Reduction Percentages With Regards To the Type of Shield
Type of shield
Clearances may be reduced by these
percentages
Sides
and rear %
Top %
(ceiling)
Can/US
A
(%)
USA
min.
Can/US
A
(%)
USA
min.
Sheet metal, a minimum of 24
gauge (0.61 mm) in thickness,
spaced out at least 25 mm (1 in)* by
non-combustible spacers
67
12 in
50
18 in
Ceramic tiles, or equivalent non-
combustible material, on non-
combustible board spaced out at
least 25 mm (1 in)* by non-
combustible spacers
50
18 in
33
24 in
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 25 mm
(1 in)* by non-combustible spacers
67
12 in
50
24 in
Brick, spaced out at least 25 mm
(1 in)* by non-combustible spacers
50
18 in
N/A
N/A
Brick, with a minimum of 24 gauge
(0.61 mm) sheet metal backing,
spaced out at least 25 mm (1 in)* by
non-combustible spacers
67
12 in
N/A
N/A
* In Canada, this space can be 21 mm (7/8 in).