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air to water HP in Std 90.1

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Hi,
Does Ashrae Std 90.1-2007 impose any minimum performance criteria for
air-to-water heat pumps working as central hot water generators for
heating purposes?
In tables 6.8.1 I can only find minimum performance requirements for
air-to-air, water source, groundwater source and ground source heat
pumps, but nothing about air-to-water.
Thanks

Feb 4, 2010
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Xavier Garcia
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