Drolet HT-2000 Specifications Page 35

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HT-2000 Installation and Operation Manual
35
7.4.2 Table of Clearance Reduction Percentages
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 po 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 po 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 po 50 24 po
Brick, spaced out at least 25 mm
(1 in)* by non-combustible spacers
50 18 po 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 po N/A N/A
* In Canada this space can be 21 mm (7/8 in).
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