View all text of Subjgrp 59 [§ 431.87 - § 431.87]

§ 431.87 - Energy conservation standards and their effective dates.

(a) Each commercial packaged boiler listed in table 1 of this paragraph (a) and manufactured on or after the effective date listed must meet the indicated energy conservation standard.

Table 1 to Paragraph (a)—Commercial Packaged Boiler Energy Conservation Standards

Equipment category Subcategory Certified rated input Efficiency level—effective date: March 2, 2012 * Hot Water Commercial Packaged BoilersGas-fired≥300,000 Btu/h and ≤2,500,000 Btu/h80.0% ET. Hot Water Commercial Packaged BoilersGas-fired>2,500,000 Btu/h82.0% EC. Hot Water Commercial Packaged BoilersOil-fired≥300,000 Btu/h and ≤2,500,000 Btu/h82.0% ET. Hot Water Commercial Packaged BoilersOil-fired>2,500,000 Btu/h84.0% EC. Steam Commercial Packaged BoilersGas-fired, all, except natural draft≥300,000 Btu/h and ≤2,500,000 Btu/h79.0% ET. Steam Commercial Packaged BoilersGas-fired, all, except natural draft>2,500,000 Btu/h79.0% ET. Steam Commercial Packaged BoilersGas-fired—natural draft≥300,000 Btu/h and ≤2,500,000 Btu/h77.0% ET. Steam Commercial Packaged BoilersGas-fired—natural draft>2,500,000 Btu/h77.0% ET. Steam Commercial Packaged BoilersOil-fired≥300,000 Btu/h and ≤2,500,000 Btu/h81.0% ET. Steam Commercial Packaged BoilersOil-fired>2,500,000 Btu/h81.0% ET.

* Where EC is combustion efficiency and ET is thermal efficiency.

(b) Each commercial packaged boiler listed in table 2 of this paragraph (b) and manufactured on or after the effective date listed in Table 2 must meet the indicated energy conservation standard.

Table 2 to Paragraph (b)—Commercial Packaged Boiler Energy Conservation Standards

Equipment category Subcategory Certified rated input Efficiency level—effective date: March 2, 2022 * Steam Commercial Packaged BoilersGas-fired—natural draft≥300,000 Btu/h and ≤2,500,000 Btu/h79.0% ET. Steam Commercial Packaged BoilersGas-fired—natural draft>2,500,000 Btu/h79.0% ET.

* Where ET is thermal efficiency.

[88 FR 64352, Sept. 19, 2023]