DESCRIPTION OF THE CHAIRMAN'S MODIFICATION TO
2018-4-5 · A qualified natural gas, propane, or oil furnace or hot water boiler is a natural gas, propane, or oil furnace or hot water boiler with an annual fuel utilization efficiency rate of at least 95. 2 Sec. 25C. 3 Pub. L. No. 111-5, February 17, 2009. 4 Ibid.
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