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QTD2
Series
18
3.0
Installation
•
Venting
Venting
When venting the QTD2 Series tube heater, it must be vented as described here to properly direct flue
gases from the unit to the outside atmosphere. The venting can terminate vertically through the roof (up)
or horizontally through a sidewall (sideways).
Follow these guidelines and all applicable codes for all models prior to installing the vent material. Local
codes may vary.
In the absence of local codes:
United States:
Refer to NFPA 54/ANSI Z223.1 (latest edition), National Fuel Gas Code.
Canada:
Refer to CAN/CSA B149.1 Natural Gas and Propane Installation Code.
Venting Requirements:
• 4 in. single wall 26 gauge (min.) galvanized steel vent pipe or Dura/Connect single wall flexible
exhaust vent must be used.
• Maximum vent length for all models is 30 ft. (9 m).
• Single wall galvanized vent pipe must be insulated in cold environments.
• Seal single wall vent with high temperature sealant (field supplied) and three (3) #8 sheet metal
screws (field supplied).
• Do not use more than two (2) 90° elbows in the exhaust vent.
• To maintain clearances to combustibles, the use of an approved wall or roof thimble and double-
wall Type B-vent is required for the portion of vent pipe that runs through combustible material in
the building wall or roof (see Figures 3.11-3.13).
Gas-fired heaters must be vented. A built in power exhauster is
provided. Additional external power exhausters are not required
or permitted.
Insufficient ventilation and/or improperly sealed vents may
release gas into the building which could result in health problems, carbon monoxide poisoning, or death.
Improper venting may result in fire, explosion, injury, or death.
WARNING
!
Do not
vent this appliance into another heater’s vents or through a masonry chimney.
Do not
use dampers in the heater vent pipe.
Single Wall vent pipe must not pass through any unoccupied attic, inside wall, concealed space, or floor.
Un-insulated single wall vent pipe must not be used outdoors for venting appliances in regions where
winter design temperature is below freezing.
WARNING
!