Are ductless heat pumps quiet? 4
Although ductless heat pumps are remarkably quiet during operation, they do make
noises. In addition to the low-level fan sound (both indoor and outdoor units), you
may also hear “whirring”, “clicking”, “rushing fluid”, etc. These sounds can be the
result of thermal expansion, refrigerant movement, or mechanical parts. This is
normal. As you encounter these sounds, please refer to the owner’s manual for
indications. If the indications are for abnormal operation or if you become concerned,
call your contractor
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