Specifications

CW2500 Insert 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 po
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 po
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 po
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)