7.4 : Efficiency Standards for Commercial HVAC




7.4.2 Efficiency Standards for Commercial Packaged Boilers
Effective for products manufactured between January 1, 1994 and March 1, 2012
Combustion Efficiency (1)
Gas-fired, with capacity ≥ 300,000 Btu/hr Not less than 80%
Oil-fired, with capacity ≥ 300,000 Btu/hr Not less than 83%
Effective for products manufactured on or after March 2, 2012
Size (Btu/hr) Efficiency Level (1)
Gas-fired, hot water ≥300,000 and ≤2,500,000 80% thermal efficiency
Gas-fired, hot water >2,500,000 82% combustion efficiency
Oil-fired, hot water ≥300,000 and ≤2,500,000 82% thermal efficiency
Oil-fired, hot water >2,500,000 84% combustion efficiency
Gas-fired except natural draft, steam ≥300,000 and ≤2,500,000 79% thermal efficiency
Gas-fired except natural draft, steam >2,500,000 79% thermal efficiency
Gas-fired-natural draft, steam ≥300,000 and ≤2,500,000 77% thermal efficiency
Gas-fired-natural draft, steam >2,500,000 77% thermal efficiency
Oil-fired, steam ≥300,000 and ≤2,500,000 81% thermal efficiency
Oil-fired, steam >2,500,000 81% thermal efficiency
Effective March 2, 2022 Size (Btu/hr) Thermal Efficiency (1)
Gas-fired natural draft, steam ≥300,000 and ≤2,500,000 79%
Gas-fired natural draft, steam >2,500,000 79%
Note(s): 1) Measured at the maximum rated capacity.
Source(s): Title 10, Code of Federal Regulations, Part 431 - Energy Efficiency Program for Certain Commercial and Industrial Equipment, Subpart E - Commercial Packaged Boilers. January 1, 2010.









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Sources:

Title 10, Code of Federal Regulations, Part 431 - Energy Efficiency Program for Certain Commercial and Industrial Equipment, Subpart E - Commercial Packaged Boilers. January 1, 2010