Form 44201460
33
Mar 2019
B.
LINE VOLTAGE (120V) ON / OFF SWITCH CONNECTION - MULTIPLE HEATERS
VENTILATION
17.0)
Where unvented infrared heaters are used, natural or mechanical means shall be provided to supply and exhaust at
least 4 cfm per 1000 Btu/hr input of installed heaters.
Exhaust openings for removing flue products shall be above the level of the heaters.
This heater requires ventilation in the building to dilute the product of combustion and provide fresh air for efficient
combustion. Power ventilation is recommended, and the minimum vent flow required is as follows:
WB35-N2and L2 = 140 cfm
The General Ventilation Rules outlined in ASHRAE GUIDE AND DATA BOOK should be observed when locating vents.
Exhaust vents must be located at the highest point above and in the vicinity of the heaters and the inlet vents must
be located below the level of the heaters. Inlet openings in the building should be well distributed high in the
sidewalls and should direct incoming air upward to dilute products of combustion while preventing drafts at lower
levels. Inlets are typically 1 to 3 sq. ft. Local codes may require that mechanical exhaust systems be interlocked
with thermostats to function simultaneously.
LIGHTING AND SHUTDOWN INSTRUCTIONS
18.0)
Summary of Contents for 44625000
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