Page 33
Installation and Operation Manual - HT-3000
ENGLISH
8.3.2 Type of shield
TYPE OF SHIELD
CLEARANCES MAY BE REDUCED BY
THESE PERCENTAGES
SIDES, CORNER
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).
