The 1992 Efficiency Standard That Transformed HVAC
In 1992, new federal efficiency standards shook up HVACR — and set the stage for the high-efficiency equipment contractors install today.
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In 1992, new federal efficiency standards shook up HVACR — and set the stage for the high-efficiency equipment contractors install today.
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In 1992, new federal efficiency standards shook up HVACR — and set the stage for the high-efficiency equipment contractors install today.
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