Why don’t more people use HWHP?

Why don’t more people use HWHP?

While they are efficient, heat pump hot water has suffered from several drawbacks that have held them back from widespread acceptance.  These include:
Higher initial cost.
Expense to repair and plumber knowledge.
Some brands are noisier than others.
Misleading claims by manufacturers.
Lack of awareness of the product and how efficient it is.

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