[Code of Federal Regulations]
[Title 10, Volume 3]
[Revised as of January 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR431.72]

[Page 414-415]
 
                            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

[[Page 415]]

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