That is not correct. Firstly you cannot assume ALL heat pumps are working correctly, as with all human endeavours some may be faulty, and you cannot assume ALL will only be deployed within their nominal working environment. again the decision to use a particular heat pump is made by a human, and thus the incorrect model could have been specified or installed.
But where the units is functioning to its specification, and it has been selected and installed correctly taking into account the expected performance and operating characteristics they can be highly efficient and effective.
Using one installation where the owner is unhappy should not be used as a unilateral condemnation of the technology. The owner should take steps to have the entire installation reviewed to discover why its performance does not meet with the owners expectations. See # 172 for a list of some of the possible reasons why the system may not meet with expectations.
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