This appliance should not be connected to a chimney flue servicing a separate appliance designed to burn solid fuel. Never connect this humidifier to a chimney servicing a fireplace.
This venting category cannot be used in direct vent applications.
Installation as a Category III Appliance
This venting system can be installed horizontally or vertically and can terminate on a rooftop or sidewall provided the NFGC (Nation Fuel Gas Code) and CAN/CGA- B149 codes are followed. The venting manufacturer instructions must also be followed. See Figure # 6,#7 & #8.
This venting must be used in all direct vent applications.
This category installation may not be common vented with any other natural draft gas appliance or power assist appliance. The humidifier cannot share a chimney flue servicing an appliance designed to burn solid fuel.
Venting must be UL or UL/CSA listed, tested to
All joints must be sealed using high temperature RTV silicone.
BH Vent Manufacturers
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4.Z Flex
The gas humidifier is supplied with the following exhaust outlets.
GS 100 | 3” |
GS 200 | 4” |
GS 300/400 | 5” |
GS 500/600 | 6” |
The venting must remain the same diameter throughout the installation.
WARNING: Provide a screen or barrier to prevent personal injury in areas where inadvertent personnel contact with vent pipe can occur.
A minimum equivalent vent length of 7 feet must be connected to the humidifier. Vent lengths must not exceed 100’ (30 m). Each 90° elbow is equivalent to 10’ and each 45° elbow equals 5'. The vent run should be as direct as possible with no more than 6 elbows in the system.
Diret vent applications, length of vent should not exceed 70” in equivalent length.
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 the 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 seven feet above grade when it is adjacent to public walkways.
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.
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.
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