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Frequently Asked Questions
How does a heat pump achieve its running cost?
It moves heat rather than making it.
Several units of heat arrive per unit of electricity.
The heat comes from the outside air.
Nothing is burned on site.
For regular seasonal use it is the usual default.
It is not a circulation pump.
Why can published outputs not be compared directly?
Each belongs to stated conditions.
Air temperature, water temperature and humidity all apply.
Manufacturers publish at different reference points.
Headline figures then measure different things.
Ask for output in the coldest month of use.
That figure decides real performance.
Is an inverter unit worth the difference?
In most installations, yes.
It modulates instead of cycling on and off.
Running at part load raises seasonal efficiency.
Noise falls considerably at reduced speed.
That matters near guest areas or a boundary.
Cycling also stresses components more.
What clearances does it need?
Enough that discharge air cannot recirculate.
The unit chills the air it blows out.
Recirculated air starves the machine progressively.
Output falls without any fault appearing.
Clearances are an operating condition, not padding.
Enclosures and fences are the usual cause.
What happens in cool weather?
Output falls and defrost becomes relevant.
Moisture forms on the evaporator as air cools.
The unit must clear it periodically.
Time spent defrosting is time not heating.
Defrost strategy varies between manufacturers.
Ask about it if shoulder-season use is planned.