[Code of Federal Regulations]
[Title 10, Volume 3]
[Revised as of January 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR431.72]

[Page 327]
 
                            TITLE 10--ENERGY
 
                    CHAPTER II--DEPARTMENT OF ENERGY
 
PART 431_ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL 
EQUIPMENT--Table of Contents
 
                 Subpart D_Commercial Warm Air Furnaces
 
Sec. 431.72  Definitions concerning commercial warm air furnaces.

    The following definitions apply for purposes of this subpart D, and 
of subparts J through M of this part. Any words or terms not defined in 
this Section or elsewhere in this Part shall be defined as provided in 
Section 340 of the Act.
    Commercial warm air furnace means a warm air furnace that is 
industrial equipment, and that has a capacity (rated maximum input) of 
225,000 Btu per hour or more.
    Thermal efficiency for a commercial warm air furnace equals 100 
percent minus percent flue loss determined using test procedures 
prescribed under Sec. 431.76.
    Warm air furnace means a self-contained oil-fired or gas-fired 
furnace designed to supply heated air through ducts to spaces that 
require it and includes combination warm air furnace/electric air 
conditioning units but does not include unit heaters and duct furnaces.

                             Test Procedures