Oxford study proves heat pumps triumph over fossil fuels in the cold::Published Monday in the scientific journal Joule, the research found that heat pumps are two to three times more efficient than their oil and gas counterparts, specifically in temperatures ranging from 10 C to -20 C.

  • @Bronzie
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    110 months ago

    Mine is air to air.
    You were probably quoted ground to air, where they must drill for ground heat?