Table Of Clearance Reduction Percentages - Osburn 2200 Installation And Operation Manual

2200 Installation and Operation Manual
7.4.2 TABLE OF CLEARANCE REDUCTION PERCENTAGES
Type of shield
Sheet metal, a minimum of 24 gauge
(0.61 mm) in thickness , spaced out at
least 25 mm (1 in)*
combustible spacers
Ceramic tiles, or equivalent non‐
combustible material,
combustible board spaced out at least
25 mm (1 in)* by non‐combustible
spacers
Ceramic tiles, or equivalent non‐
combustible material,
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
Brick, spaced out at least 25 mm
(1 in)* by non‐combustible spacers
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
* In Canada this space can be 21 mm (7/8 in)
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Clearances may be reduced by these
and rear %
Can/USA
(%)
67
by non‐
on non‐
50
on non‐
67
50
67
percentages
Sides
USA Can/USA
min. (%)
12 po 50
18 po 33
12 po 50
18 po N/A
12 po N/A
Top %
(ceiling)
USA
min.
18 po
24 po
24 po
N/A
N/A