Heating equipment shall be located so that the clear space between any heated surface and combustible construction is sufficient to prevent temperatures of more than 160 degrees Fahrenheit on such constructions. Unless specifically otherwise provided, the clearances generally shall be as follows:
CLEARANCES | |||
Temp. of Surface Radiating Heat ( F.) | Top (in.) | One Side and Rear (in.) | Other Side and Front (in.) |
200 to 400 | 12 | 12 | 18 |
Over 400 to 600 | 18 | 18 | 18 |
Over 600 to 1,000 | 36 | 36 | 48 |
When the combustible construction or the surface radiating heat is protected, the clearances may be reduced in amount proportioned to the effectiveness of the protection provided. In systems where the air is heated by a coal-fired furnace, all portions of the supply ducts and supply plenums exposed to direct heat rays from the furnace heating surface shall clear combustible construction, including incombustible surface material mounted against combustible construction, by at least eight inches.
(Ord. 555. Passed 2-19-53.)