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• Do not use this heater for heating human living quarters.
• Use of direct-fired heaters in the construction environment can result in exposure to levels of CO, CO2 and NO2
considered to be hazardous to health and potentially life threatening.
• Do not use in unventilated areas
• Know the signs of CO and CO2 poisoning
- Headaches, stinging eyes
- Dizziness, disorientation
- Difficulty breathing, feels of being suffocated
• Proper ventilation air exchange (OSHA 29 CFR 1926.57) to support combustion and maintain acceptable air quality shall
be provided in accordance with OSHA 29 CFR Part 1926.154, ANSI A10.10 Safety Requirements for Temporary and
Portable Space Heating Devices and Equipment used in the Construction Industry or the Natural Gas and Propane
Installation Codes CSA B149.1
- Periodically monitor levels of CO, CO2 and NO2 existing at the construction site - at the minimum at the start of the
shift and after 4 hours.
- Provide ventialtion air echange, either natural or mechanical, as required to maintain acceptable indoor air quality
USA 8-Hr Time weighted average
(OSHA 29 CFR 1926.55 App A)
CO
50 ppm
CO2
5000 ppm
NO2
USA - Ceiling Limit
(Short Term Exposure Limit = 15 minuntes)
CO
CO2
NO2
5 ppm
• Ensure that the flow of combustion and ventilation air exchange cannot become obstructed.
• As the building "tightens up" during the construction phases ventilation may need to be increased.
Gases:
Capacity:
Note: Derate input for altitude over 2000 Ft. (609.6 M) by 4% each 1000 Ft. (304.8 M) above sea level.
Orifice Size:
Blower:
Electrical Rating:
Minimum Temperature Rating:
Gas Supply:
Inlet Pressure
Max PSI
Propane
20
Natural Gas
20
Inlet Connection:
Model 750NEF
4
WARNING - AIR QUALITY HAZARD
SPECIFICATIONS
Model No. 750NEF
Natural or Propane
750,000 Btu/h maximum, 450,000 Btu/h minimum
32 DMS (x17)
7,000 CFM
115V 60Hz 15 amps, single phase
Minus 20 degrees F
Min PSI
1
3
1-1/4" FNPT
Canada 8-hr time weighted average
Worksafe BC OHS Guidelines Part 5.1
and Ontario Workplaces Reg 833
25 ppm
5000 ppm
3 ppm (Reg 833)
Canada STEL (15 minutes Reg 833/1 hour
WSBC) WorkSafe BC OHS Guidelines Part 5.1
and Ontario Workplaces Reg 833
100 ppm
15000 ppm (WSBC)
30000 ppm (Reg 833)
1.0 ppm (WorkSafeBC)
5.0 ppm (reg 833)
Hi Fire
W.C.
7"
2.8"
Maximum Duct Length Straight: 100 ft @ 24" diameter
SP 1" @ 5000 CFM
Weight (approximate): 325 lbs.
Lo Fire
W.C.
1.3"
1.3"
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