UL 727

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These requirements cover oil-fired central furnaces which include forced-air furnaces of the downflow, horizontal, and upflow types. Floor-mounted unit heaters designed to supply heated air through ducts are covered also by these requirements.

These requirements cover furnaces intended to burn standard grade fuel oils as specified in the Specifications for Fuel Oils, ASTM D396.

Requirements for the installation and use of oil-burning equipment are included in the Standard for Installation of Oil-Burning Equipment, NFPA 31, and in codessuch as the BOCA National Mechanical Code, the SBCC Standard Mechanical Code, and the IAPMO Uniform Mechanical Code. The applicable requirementsare to be utilized i n conjunction with this standard.

A product that contains features, characteristics, components, materials, or systems new or different from those in use when the Standard was developed, and thatinvolves a risk of fire, electric shock, or injury to persons, shall be evaluated using the appropriate additional component and end-product requirements as determinednecessary to mai ntain the level of safety for the user of the product as originally anticipated by the intent of this Standard.

Edition:

8th

Published:

01/01/1994