Nortec GS Series - Manual (Page 22)

19 | GS Series Installation
BH Vent Manufacturers
Flex-l international
Fas-n seal
Heat-fab Inc.
Z flex
Warning:
Provide a screen or barrier to prevent personal injury in areas where inadvertent personnel contact with
vent pipe can occur.
Additional requirements when venting through a sidewall.
For sidewall venting, locate the humidifier as close as possible to the wall being used.
Locate the vent terminal at least three feet above any forced air inlet located within ten feet; or at least four
feet below, four feet horizontally from, or one foot above any door, window, or gravity air inlet into any
building.
A minimum horizontal clearance of four feet from electric meters, gas meters, regulator and relief equipment
is required.
For sidewall vent terminations, the humidifier must be installed with a certified vent terminal that can be
purchased from Nortec.
GS 100 3” Nortec P/N 1502321
GS 200 4” Nortec P/N 1502322
GS 300/400 5” Nortec P/N 1507320
GS 500/600 6” Nortec P/N 1507321
Locate the vent terminal at least 7 feet or 2.1 m above grade from public walkways, adjacent buildings,
operable windows and building openings, consistent with the National Fuel Gas Code ANSI Z223.1 and/or
CSA B149.1 Installation codes.
Locate the bottom of the vent terminal at least twelve inches above grade or ground, or normally expected
snow accumulation level. The snow level may be higher on walls exposed to prevailing winds.
Locate terminal at least 4 feet or 1.22 m from electric meter, gas meters, regulators, and relief equipment.
Avoid areas where local experience indicates 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 of
the humidifier. If this is not possible (as in cases of positive or negative room pressures) the humidifier
should be installed with the sealed combustion or direct vent option.