The right heat pump, sized correctly, installed properly.
Most heat pumps are oversized, misplaced, or poorly integrated. A supplier sizes for the biggest possible load. A plumber puts it where it fits. Neither does the calculation first. We do the calculation first, then specify the unit – and our own team installs it.
East Fremantle – Euroheat whole-home system, installed 2019
Oversized is not safe. It's expensive.
The default in the industry is to size up. Oversized sounds like a good problem to have – but it is not. A heat pump that is too large for its load short-cycles: it switches on, heats quickly, switches off, switches on again. Each start is the most energy-intensive moment in the cycle. More starts mean more energy, more wear, and a shorter life.
Undersized is the other failure: the unit runs all day, never reaches the set temperature, and your bill reflects a heat pump running flat out, all day, with no break.
Boxed in loses up to 50% efficiency.
A heat pump extracts heat from the air around it. Put it in a corner against two walls, or box it behind a fence, and it runs out of air to extract from – it effectively suffocates. Efficiency drops by up to 50%, and it never recovers unless it is moved.
We site the heat pump in the design, before walls go up or fences go in. That is the only time siting can be done without a costly re-route.
Calculation first. Equipment selection second.
Most suppliers work the other way: they have a product range and they find something in it that is roughly the right size. We start with your building's actual load – calculated from plans, not guessed from floor area – and then select the unit that matches that load at the operating conditions your climate produces.
The difference matters because heat pumps are rated at standard conditions (usually 7°C outside air). A Perth July night averages about 8°C, but the mornings that matter drop to 2–4°C, colder in the hills and the south-west. We select the unit for those mornings, at the water temperature your system actually runs – not on a nominal kW rating on a data sheet.
We also integrate properly. A heat pump connected to a hydronic system needs to talk to the controls, send water out at the right temperature, and not fight the zoning – the separate thermostat areas. We design the whole system, not just the box that sits outside.
Which heat pump job is yours?
Hot water
Replace your electric storage heater with a heat pump hot water unit. Efficiency of 300–400%, against about 100% from a standard electric element. The full story below →
Pool heating
A solar-synced pool heat pump runs on your surplus solar during the day, putting surplus solar into your pool instead of exporting it for 2 cents. Pool heating details →
Space heating (hydronic)
The heat source for a floor heating or radiator system is almost always a heat pump. We size and site it as part of the whole system design – not as an afterthought. Radiator systems →
If you have solar panels
A properly controlled heat pump can be scheduled or dynamically managed to run during your surplus solar export hours – turning the 2 cents a unit Synergy pays for midday exports (10 cents after 3 pm) into hot water or a warm pool instead. A timer does this poorly (it can't see when a cloud passes or the aircon kicks in). An intelligent controller does it properly. We specify and install the control logic as part of the installation, not as a retrofit thought.
Wondering about geothermal or heat recovery? Geothermal is a heat pump with a better energy source – and a much bigger bill for reaching it; sometimes that pays back, sometimes it never would. Heat recovery means two different things – a heat pump that reuses waste heat, or ventilation that keeps the warmth in the air it swaps. One honest page on each: Geothermal, Straight → · Heat Recovery Ventilation, Straight →
Electric hot water is probably costing you twice what it should.
If your hot water comes from an electric storage tank, every unit of heat costs you a full unit of electricity, plus what the tank loses overnight.
A heat pump hot water unit delivers three to four units of heat for each unit of electricity. It does this by extracting heat from the air around it – the same physics that makes a reverse-cycle aircon warm a room from outside air in winter.
Replace your electric storage heater with a heat pump unit.
If you have solar panels, the payback comes sooner. A heat pump hot water unit can be timed or controlled to run during your midday solar surplus – heating your water from the energy you're currently exporting for 2 cents per unit rather than buying it back at about 33 cents.
We install the Stiebel Eltron WWK 302H and comparable units. Government rebates and STCs (small-scale technology certificates) may apply – ask us about current availability when you enquire.
Frequently asked.
How do I know what size heat pump I need?
Where should a heat pump be installed?
Can a heat pump run on solar power?
Do I need a plumber or an electrician?
What brands do you install?
"Euroheat is focused on providing long term solutions, not selling mass produced heating or cooling units... it was more cost effective than using other companies selling standardized heat pumps, floor heating and air conditioning units."
Prefer to watch? Combining heating, cooling and hot water – the pros and cons, a 5-minute video → More on the Euroheat YouTube channel →
Size it first. Then buy it.
Every failure on this page – oversized, undersized, boxed in – is prevented by a calculation before you buy. We calculate the size, the siting and the controls first, then specify the unit and install it. If the heat pump will run a floor or radiators, the Running Cost Calculator shows what that calculation is worth.
Ready to go ahead? Send us your project details →