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// CODE SNIPPET

Section 611 (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters

Fuel Gas Code 2021 of Alabama > 6 Specific Appliances > 611 (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters
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611.1 General

Nonrecirculating direct-fired industrial air heaters shall be listed to ANSI Z83.4/CSA 3.7 and shall be installed in accordance with the manufacturer's instructions.

611.2 Installation

Nonrecirculating direct-fired industrial air heaters shall not be used to supply any area containing sleeping quarters. Nonrecirculating direct-fired industrial air heaters shall be permitted to provide ventilation air.

611.3 Clearance From Combustible Materials

Nonrecirculating direct-fired industrial air heaters shall be installed with a clearance from combustible materials of not less than that shown on the rating plate and in the manufacturer's instructions.

611.4 Supply Air

All air handled by a nonrecirculating direct-fired industrial air heater, including combustion air, shall be ducted directly from the outdoors.

611.5 Outdoor Air Louvers

If outdoor air louvers of either the manual or automatic type are used, such devices shall be proven to be in the open position prior to allowing the main burners to operate.

611.6 Atmospheric Vents and Gas Reliefs or Bleeds

Nonrecirculating direct-fired industrial air heaters with valve train components equipped with atmospheric vents or gas reliefs or bleeds shall have their atmospheric vent lines or gas reliefs or bleeds lead to the outdoors. Means shall be employed on these lines to prevent water from entering and to prevent blockage by insects and foreign matter. An atmospheric vent line shall not be required to be provided on a valve train component equipped with a listed vent limiter.

611.7 Relief Opening

The design of the installation shall include provisions to permit nonrecirculating direct-fired industrial air heaters to operate at rated capacity without overpressurizing the space served by the heaters by taking into account the structure's designed infiltration rate, providing properly designed relief openings or an interlocked power exhaust system, or a combination of these methods. The structure's designed infiltration rate and the size of relief openings shall be determined by approved engineering methods. Relief openings shall be permitted to be louvers or counterbalanced gravity dampers. Where motorized dampers or closable louvers are used, they shall be verified to be in their full open position prior to main burner operation.

611.8 Access

Nonrecirculating direct-fired industrial air heaters shall be provided with access for removal of burners; replacement of motors, controls, filters and other working parts; and for adjustment and lubrication of parts requiring maintenance.

611.9 Purging

Inlet ducting, where used, shall be purged by not less than four air changes prior to an ignition attempt.

Related Code Sections


Section 611 Specific Appliances, (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters
Nonrecirculating direct-fired industrial air heaters shall be listed to ANSI Z83.4/CSA 3.7 and shall be installed in accordance ...
Fuel Gas Code 2015 of Alabama > 6 Specific Appliances > 611 (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters
Section 611 Specific Appliances, Fireplaces and Solid Fuel-Burning Equipment, (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters
Nonrecirculating direct-fired industrial air heaters shall be listed to ANSI Z83.4/CSA 3.7 and shall be installed in accordance ...
Fuel Gas Code 2009 of Alabama > 6 Specific Appliances, Fireplaces and Solid Fuel-Burning Equipment > 611 (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters
Section 611 Specific Appliances, (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters
Nonrecirculating direct-fired industrial air heaters shall be listed to ANSI Z83.4/CSA 3.7 and shall be installed in accordance ...
Fuel Gas Code 2021 of Alabama > 6 Specific Appliances > 611 (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters
611.5 Specific Appliances, Outdoor Air Louvers
If outdoor air louvers of either the manual or automatic type are used, such devices shall be proven to be in the open position prior to allowing ...
Fuel Gas Code 2015 of Alabama > 6 Specific Appliances > 611 (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters > 611.5 Outdoor Air Louvers
611.1 Specific Appliances, General
Nonrecirculating direct-fired industrial air heaters shall be listed to ANSI Z83.4/CSA 3.7 and shall be installed in accordance ...
Fuel Gas Code 2021 of Alabama > 6 Specific Appliances > 611 (IFGC) Nonrecirculating Direct-Fired Industrial Air Heaters > 611.1 General
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