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Description / Abstract:
These requirements apply to the following types of liquid
fuel-burning appliances intended for installation in manufactured
homes and recreational vehicles, including travel trailers, camping
trailers, truck campers, motor homes, and park trailers.
a) Direct vent system type heating appliances that provide for
complete separation between the indoor atmosphere and combustion
system, including the air supplied for combustion by inherent
design of the furnace and its venting system.
b) Vented heating appliances other than of the direct vent
system type that provide for separation between the indoor
atmosphere and combustion system, including the air supplied for
combustion by an installation method. Such appliances can be used
only in manufactured homes, not in recreational vehicles.
Requirements for the installation and use of these appliances
are included in the following standards:
a) For Manufactured Homes – The Department of Housing and Urban
Development Manufactured Home Construction and Safety Standards,
Title 24 CFR, Part 3280, 1994.
b) For Recreational Vehicles – The National Fire Protection
Association Standard for Fire Safety Criteria for Recreational
Vehicles, NFPA 501C-1993.
An appliance constructed to burn liquid fuel or gas and a liquid
fuel burning appliance constructed and designed so that it may be
converted to burn gas by installation of a specific gas burner
shall also comply with the applicable requirements in the Standard
for Gas-Burning Heating Appliances for Manufactured Homes and
Recreational Vehicles, UL 307B.
The term ²appliance² as used in this standard refers to any
heating appliance covered by this standard, such as a warm air
central furnace, a wall furnace, a heating boiler, and a water
heater.
A product that contains features, characteristics, components,
materials, or systems new or different from those covered by the
requirements in this standard, and that involves a risk of fire or
of electric shock or injury to persons shall be evaluated using
appropriate additional component and end-product requirements to
maintain the level of safety as originally anticipated by the
intent of this standard. A product whose features, characteristics,
components, materials, or systems conflict with specific
requirements or provisions of this standard does not comply with
this standard. Revision of requirements shall be proposed and
adopted in conformance with the methods employed for development,
revision, and implementation of this standard.