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FSEC-PF-413-04
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FSEC-PF-413-04
What is HSPF?
What is HSPF?
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![Clean & Efficient Heat: Air‑Source Heat Pumps [2040 Energy]](https://www.2040energy.com/img/2019/07/IECCmap_Revised.jpg "Clean & Efficient Heat: Air‑Source Heat Pumps [2040 Energy]")
Clean & Efficient Heat: Air‑Source Heat Pumps [2040 Energy]
What is HSPF?
