Heat pumps & hot water
Choosing, sizing and placing a heat pump, heat pump or gas, hot water, solar and running costs.
Gas or electric central heating: should I replace my gas heater with a heat pump?
Central heating runs on gas or electricity. What to do when the old gas heater gets dear, and which swap suits your house.
Will a heat pump last near the coast?
Salt air shortens an outdoor unit's life. How to choose, place and look after a heat pump in a beach suburb.
Is floor heating with a heat pump environmentally friendly?
On today's WA grid a heat pump is level with gas or a bit better, and getting better. The house and the floor decide the rest.
Is an air-to-water heat pump worth it in Perth?
A dollar of power in, about three dollars of heat out. When an air-to-water heat pump pays its way in Perth, and when it doesn't.
Are there rebates for heat pumps or geothermal in WA?
Nothing for a heating heat pump or geothermal, as of October 2026. What you can claim on hot water, batteries and loans.
Can one heat pump do my heating and my hot water?
Yes, through a special indoor tank. Why two separate heat pumps usually cost less, and when one machine is worth it.
Are solar hot water panels worth adding to hydronic heating?
Solar hot water makes its heat in summer, when nobody needs heating. What works better, and the one case where it pays.
Will solar and a battery run my heat pump heating through a winter night?
Your panels can run the heat pump at midday. Winter nights are another story: what a battery covers, and what the floor stores.
Can you put a heat pump in a garage, and where should it go?
In a closed garage a heat pump breathes its own cold air and loses up to half its efficiency. How to hide one properly.
What size heat pump does my house need?
Floor area is only the start. How a heat pump is sized for Perth's coldest mornings, and what too big and too small each cost you.
How do I choose a hot water heat pump?
Five things to check before you buy a hot water heat pump, the one feature Phil calls a gimmick, and how to size it.
Should I replace my gas hot water with a heat pump?
Usually yes, when the old unit is due. When keeping gas makes sense, the rebate, and where to put a heat pump so nobody hears it at night.