Free heat from the air.
Even in January.
An air source heat pump pulls warmth out of outdoor air and moves it into your radiators and hot water. For every 1 kW of electricity it uses, you get 3 to 4 kW of heat.
A fridge in reverse.
Four steps, on repeat.
Your fridge moves heat out of its box. A heat pump does the same job the other way round, moving heat from outside air into your home.
Absorb
A fan draws outdoor air over a coil filled with refrigerant. The refrigerant boils at very low temperatures, so it soaks up warmth even from freezing air.
Compress
An electric compressor squeezes that vapour. Squeezing a gas makes it hotter, and this is where your 1 kW of electricity goes.
Transfer
The hot refrigerant passes its heat to the water in your heating system, then cools, expands and goes back round to collect more.
Deliver
Warm water flows to your radiators or underfloor heating and to a hot water cylinder, ready for showers and taps.
Put 1 kW in.
Get 3 to 4 kW out.
Most of the heat comes free from the air. That is why heat pumps are 300–400% efficient, while even the best gas boiler can't beat 100%.
- Up to 70% less carbon from heating than a gas boiler
- No flame, no flue and no fossil fuel burnt in your home
- Built to last 20 years or more with an annual service
How efficient would one be in your home?Your instant price includes an estimated running cost and carbon saving.
Get my instant price →Built for British winters.
Designed for your postcode.
The heat pumps we fit keep working down to −25 °C. We design every system to MCS standards for the coldest days where you live, so you stay warm when it matters.
- Runs longer at a lower temperatureInstead of short, hot bursts like a boiler, it keeps a steady, even warmth all day.
- Works a little harder when it's coldEfficiency dips slightly in freezing weather, and your design allows for it.
- Defrosts itself automaticallyIn damp, frosty weather it briefly melts ice off its coil. A little steam or water is normal.
- Backed by our Heat Pump PromiseIf it doesn't keep your home at the agreed temperatures in year one, we fix it or refund you.
Quieter than you think.
About as loud as a fridge.
At 3 metres, a heat pump runs at around 38 dB(A), like a quiet library. Showroom visitors often ask us to switch one on, and it has been running the whole time.
- A noise assessment on every install, certified with MCS
- Comfortably under the 42 dB permitted-development limit
- It hums gently while it runs, a bit louder on the coldest days, and you shouldn't hear it indoors
- Ideal Logic Air is Quiet Mark approved, one of the quietest on the market
How loud, compared?
Sound level in dB(A). The orange line marks the 42 dB permitted-development limit.
Smaller than a wheelie bin.
Plus a cupboard inside.
Most homes have room, flats included. You need a spot outside for the unit and space indoors for a hot water cylinder. We'll design around your layout.
- Outdoor unit about 1 m × 0.5 mAllow a ground area of about 2 m × 1 m, with 1 m clear in front and at least 200 mm behind for airflow.
- Cylinder about 70 × 70 × 200 cmOr an integrated unit with a 600 × 600 mm footprint that fits most airing cupboards (split systems only).
- On a patio, gravel, a concrete base or a wall bracketIf you need a new base, your builder lays it before install day. We give you the sizes.
- Not in a shed or outbuildingIt would pull all the heat out of the air inside and turn it into a freezer.
- Further down the garden is possibleIt costs extra for longer pipe and cable runs, and you arrange the trenching.
Lower temperature.
Bigger radiators, smaller bills.
A boiler heats radiator water to 70–80 °C in short bursts. A heat pump is most efficient sending cooler water, around 45 °C, all day long. The bigger your radiators, the cooler that water can be.
Do I need new radiators?
Not always. We measure every room and check each radiator in your survey, then only upgrade the ones that need it. Upgrades are included in your quote.
Short on budget? You can keep more radiators and run a higher flow temperature. It costs a little more to run, and your quote shows the trade-off.
Weather compensation: set once, saves daily
Your heat pump watches the outdoor temperature and sends cooler water on mild days and warmer water on cold ones. It never works harder than it needs to.
- We set your heating curve on install day
- Keep it running steadily and set back a little when you're out
- Clear leaves, snow and debris from the unit each season
See how many radiators your home might need.Your instant price shows three design options, from lowest upfront to lowest bills.
Get my instant price →Six steps to warm.
We handle the hard parts.
From your first price to your first warm winter, here's exactly what happens and who does what.
Your install week,
day by day.
No guesswork about who's in your home and when. Here's a typical 3–5 day install.
Prep
The team arrives, protects your floors and carpets, takes delivery of the kit and sets the outdoor unit on its base or bracket.
Pipework and electrics
Pipes run between the outdoor unit and your cylinder, and the electrician connects the heat pump's own circuit.
Radiators and switchover
Any radiator upgrades go in and we switch your heating from the old system to the heat pump.
Commissioning and handover
We fill, test and fine-tune the system, set your heating curve and show you the controller and app.
Before install day, you'll need to
- Clear access for a pallet delivery and the cylinder space
- Have any concrete base or trenching done by your builder
- Arrange scaffolding if your survey says it's needed
- If you're on oil, empty the tank so it can be taken away
After handover, you'll have
- Your MCS certificate and installation documents
- A controller tutorial and app set up on your phone
- Your manufacturer warranty plus 2 years on all other parts
- A support team you can call, from quote to after install
Ready to see what it costs?Prices from £4,100 with EDF Express, after the £7,500 grant.
Get my instant price →Seven things that decide
how efficient it runs.
A badly designed heat pump is expensive to run. A well designed one isn't. When people ask why a heat pump costs a lot to run, the answer is usually one of these.
Right-sized design
Too small and it can't keep up with your heat loss. Too big and it switches on and off, wasting energy. We size it from a room-by-room heat-loss calculation.
Radiator size
Bigger radiators, or underfloor heating, let it run cooler water. Cooler water means a higher efficiency.
Insulation
A well-insulated home holds its heat, so the heat pump works less. It's recommended, not required.
Weather compensation
Set correctly, it lowers the water temperature on mild days. We set it on install day.
Hot water setting
Hot water around 45–50 °C covers most needs. Setting it hotter costs more.
Outdoor temperature
It works a little harder in winter, so efficiency is judged across the whole year, not one cold week.
Servicing
An annual service keeps filters, pressure and airflow right, and your warranty valid.
Heat steady, not in bursts
Leave it running at a steady temperature and turn it down a little when you're out. A heat pump can take from 30 minutes to a few hours to warm a cold room.
Myths, busted
- “They don't work in the cold.”The heat pumps we fit keep heating at −25 °C, and we design for your postcode’s coldest days.
- “You need underfloor heating.”Radiators work well. Some may need to be bigger, and we check every one.
- “Flats can't have one.”Most homes are suitable, flats included, if there's outdoor space and room for a cylinder.
- “They're noisy.”About 38 dB(A) at 3 m, like a fridge.
- “Gas boilers are being banned.”No ban is planned. Heat pumps are a choice, and for many homes a good one.
Jargon, decoded
- COP (coefficient of performance)
- Heat out divided by electricity in, at a given moment. A COP of 3 means 3 kW of heat from 1 kW of electricity. It doesn't break the laws of physics: the extra energy comes from the air.
- SPF (seasonal performance factor)
- The same idea averaged over a whole year of hot and cold days. It's the best guide to running costs.
- Flow (leaving water) temperature
- How hot the water leaving the heat pump is. The lower it is, the more efficient the system.
- Heat loss
- How fast your home loses heat on the coldest day, in kW. It sets the size of your heat pump.
- Monobloc or split
- Monobloc keeps all the refrigerant outside, with water pipes into the house. Split systems put some parts indoors.
- Defrost cycle
- A short, automatic routine that melts ice off the outdoor coil in frosty weather.
See your heat loss, heat pump size and running cost.Your instant price shows the working, not just a number.
Get my instant price →