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SECTION 4: NATIONAL
STANDARDS AND APPLICABLE
CODES
4.1 Gas Codes
Type of gas appearing on the nameplate must be
the type of gas used. Installation must comply with
national and local codes and requirements of the
local gas company.
United States: Refer to National Fuel Gas Code NFPA
54/ANSI Z223.1 – latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 – latest revision.
4.2 Aircraft Hangars
Installation in aircraft hangars must be in accordance
with the following codes:
United States: Refer to Standard for Aircraft Hangars,
NFPA 409 – latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 – latest revision.
In aircraft storage and servicing areas, heaters shall
be installed at least 10 ft (3 m) above the upper
surface of wings or of engine enclosures of the
highest aircraft which may be housed in the hangar.
The measurement shall be made from the wing or
engine enclosure (whichever is higher from the floor)
to the bottom of the heater.
• In shops, offices, and other sections of aircraft
hangars communicating with aircraft storage or
servicing areas, heaters shall be installed not less
than 8 ft (2.4 m) above the floor.
• Suspended or elevated heaters shall be so located
in all spaces of aircraft hangars that they shall not
be subject to injury by aircraft, cranes, movable
scaffolding, or other objects. Provisions shall be
made to assure accessibility to suspended heaters
for recurrent maintenance purposes.
4.3 Public Garages
Installation in garages must be in accordance with
the following codes:
United States: Refer to Standard for Parking
Structures NFPA 88A – latest revision or the Code for
Motor Fuel Dispensing Facilities and Repair Garages,
NFPA 30A – latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 – latest revision.
• Heaters must not be installed less than 8 ft
(2.4 m) above the floor. Minimum clearances to
combustibles must be maintained from vehicles
parked below the heater.
• When installed over hoists, minimum clearances
to combustibles must be maintained from the
uppermost point of objects on the hoist.
4.4 Electrical
Heater must be electrically grounded in accordance
with the following codes:
United States: Refer to National Electrical Code®,
NFPA 70 – latest revision. Wiring must conform
to the most current National Electrical Code, local
ordinances, and any special diagrams furnished.
Canada: Refer to Canadian Electrical Code, CSA
C22.1 Part 1 – latest revision.
4.5 Venting
Venting must be installed in accordance with the
requirements within this manual and the following
codes:
United States: Refer to National Fuel Gas Code NFPA
54/ANSI Z223.1 – latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 – latest revision.
4.6 High Altitude
These heaters are approved for installations up to
2,000 ft (610 m) (US), 4,500 ft (1,370 m) (Canada)
without modification. Consult Big Ass Fans if US
installation is above 2,000 ft (610 m) or Canadian
installation is above 4,500 ft (1,370 m).
Summary of Contents for IRH
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