17
Use of cellular core PVC (ASTM F*891), cellular core CPVC or Radel
(Polyphenolsulfone) in venting systems shall be prohibited.
Connecting non5metallic vent pipe and fittings with thermal insulation shall be
prohibited.
Horizontal portions of the venting system shall be supported to prevent sagging by
installing support every 36 inches. The horizontal runs must be sloping upwards not
less than ¼ inch per foot from the boiler to the chimney connector
.
7.0 FUEL SYSTEM
(COMBUSTION & VENTILATION OPENINGS)
Install openings and ductwork to the boiler room providing fresh out-side combustion
and circulating air, as installation code require by Canada CSA B139 or NFPA 31
whichever applicable. If installed in a closed room, provide two free air ventilation
openings of at least 8’’ x 12’’ (96 sq in.) free flow areas near celling and floor. Oil
burners must have sufficient air to allow vent system to operate properly.
Draft
regulator