Nortec GS - Exhaust Vent Checklist

49Installation
Nortec GS
2583703_EN_1608
The following additional requirements of the National Fuel Gas Code (ANSI Z223.1), or CAN/CGA B149
Installation Codes must be satised if the exhaust vent terminates through a sidewall:
– Locate the humidier as close as possible to the wall that is used for termination of the vent.
– Locate the exhaust terminal at least 3 ft (900 mm) above any forced air inlet located within 10 ft
(3 m); or at least 4 ft (1.2 m) below, and 4 ft (1.2 m) horizontally from, or 12 in (300 mm) above any
door, window, or gravity air inlet into any building.
– Maintain a minimum horizontal clearance of 4 ft (1.2 m) from electric meters, gas meters, regulator
and relief equipment.
– Install certied vent terminals at the vent terminations. Refer to Table 16 on page 44.
– Locate the vent terminal at least 7 ft (2.1 m) above grade when it is adjacent to public walkways.
– Locate the bottom of the vent terminal at least 12 in (300 mm) above grade or ground, or normally
expected snow accumulation level. The snow level may be higher on walls exposed to prevailing winds.
– Avoid areas where experience shows that condensate drip may cause problems – such as above
planters, patios, or over public walkways, or over an area where condensate or vapor could create
a nuisance or hazard, or could be detrimental to the operation of regulators, relief valves, or other
equipment. Refer to the vent manufacturer's installation instructions.
– The vent terminal must be installed in the same atmospheric pressure zone as the combustion air
inlet for the humidier. If that is not possible (as in cases of positive or negative room pressures),
sealed combustion must be utilized.
5.8.3 Exhaust Vent Checklist
Check the following to ensure that the exhaust vent for the humidier has been installed correctly:
 Exhaust vent installed to meet all national and local codes, vent manufacturer and Nortec require-
ments?
 Proper clearances maintained between exhaust vent and combustible materials?
 Exhaust vent diameter as listed in Table 16 on page 44, and uniform over the entire run?
 Exhaust vent length does not exceed an equivalent length of 100 ft (30 m)? If unit is a Nortec GS 50
using propane gas, is it limited to 50 ft (15 m)? Maximum six elbows in the exhaust vent?
 Exhaust vent secured properly with hangers or pipe straps?