scope:

This Standard specifies the methods for determining seasonal utilization efficiency for oil-fired furnaces having an input of up to and including 66 kw (225,000 Btu/h) and boilers having an input of up to and including 88 kw (300,000 Btu/h). The tests contained in the Standard are not intended to represent actual efficiencies realized in the field. Instead, these tests provide a standardized method of comparing relative unit performance. The testing conditions are specified in Clauses 3, 4 and 5.

This Standard sets out minimum efficiency levels for oil-fired furnaces and boilers in Clause 7.

 This Standard applies to the oil-fired portion of a combination or multi-level burning appliance.