MANTLE DEPTH “A” 1” 2” 3” 4” 5” 6” 7”
CLEARANCE FROM BASE OF
HEATER “B”
37 7/8” 39 7/8” 40 7/8” 42 7/8” 44 7/8” 46 7/8” 48 7/8”
Fig. 1b Clearances to combustible materials in front of enclosure opening - All installations
Fig 1d Combustible material enclosure - For installations
in Canada with unprotected combustible floor
Fig 1c Combustible material enclosure - For installations in
USA with protected combustible floor
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