IBC SL 35-199 Operating Instructions Manual page 16

Figure 7: IBC recommended
minimum vent terminal clearance
under ventilated soffit
Figure 8: Prohibited installation
Figure 10: Vent terminal clearances
1-10
SL 35-199, SL 45-260 MODULATING GAS BOILERS
Figure 9: Sidewall vent termination - multiple vent piping configuration
Vent terminal clearance minimums are as follows:
•
Clearance above grade, veranda, porch, deck or balcony – 12" (0.3m), but
check local code also (anticipated snow levels may supersede).
•
Clearance to openable window or door – 36" (0.91m) (USA – 12")
•
Vertical clearance to ventilated soffit located above the terminal - 48" (1.2m)
See Caution note in this section.
•
Clearance to each side of centre line extended above meter/regulator
assembly: - 3' (0.91m) within a height of 15' (4.6m) above the meter/regulator.
•
Clearance to service regulator vent outlet: - 3' (0.91m)
•
Clearance to non-mechanical air supply inlet to building or the combustion air
intake to any other appliance: - 3' (0.91m) (USA – 12" (0.3m))
•
Clearance to a mechanical air supply inlet: - 6' (1.82m) (USA - 3' (0.91m)
above if within 10' (3.1m) horizontally)
Figure 11: Vent terminal clearances
INSTALLATION AND OPERATION INSTRUCTIONS