R290 Air-to-Water whole-home heating and hot water — guide from £6000 after the Boiler Upgrade Scheme grant; formal quote follows survey and heat-loss calculation, not online checkout.
Residential · Air-to-Water heat pump
Whole-home heating and hot water — from the air, not from gas.
R290 Air-to-Water whole-home heating and hot water — guide from £6000 after the Boiler Upgrade Scheme grant; formal quote follows survey and heat-loss calculation, not online checkout. Explore the systems below, or ask Current where to start.
What a whole-home Air-to-Water system looks like.
We only install R290. Here's why that's deliberate, not a limitation.
We install R290 only.
It costs a little more upfront and demands a properly qualified installer — which is exactly why we don't cut that corner. You're not choosing a refrigerant when you get a quote from us. You're getting the one worth building a 20-year system around.
Here's why: most UK heat pumps run on R32 — GWP of 675. R290 (propane) is GWP 3. Refrigerant rules depend on the country and the type of system. They restrict new equipment placed on the market. They do not stop an installed system being used or serviced. We specify the refrigerant for the system we offer.
MCS-certified. Fitted by trained installers. Every job tracked in your Pretium Customer Portal, booking to aftercare.
R290 systems we work with
Three manufacturer families — survey and heat-loss calculation confirm which fits your home. No online checkout; register interest or request a survey from each product page or via 
Current.
Mitsubishi Electric Ecodan
This innovative model has a guaranteed operation range down to -25°C ambient temperature, while utilising the refrigerant properties of R290 to efficiently achieve high water temperatures up to 75°C. Available in single and three phase, standard and coastal protection models.
View Ecodan options →Daikin Altherma
The Altherma Monobloc is a complete heat pump system contained in a single outdoor unit. Designed to connect directly to your home’s heating system, it provides an efficient and straightforward way to deliver heating and hot water.
View Altherma range →Ideal HP290
The HP290 monobloc heat pump has been designed for the UK climate, providing efficient heating and hot water throughout the year. Our monobloc technology enables easy installation and servicing to deliver simple and reliable low carbon heating.
View Ideal HP290 →
The grant that changes the numbers
The Boiler Upgrade Scheme is a UK government grant that reduces the upfront cost of an Air-to-Water heat pump — currently £7,500 off a standard installation, or £9,000 if you're currently on oil or LPG and off the mains gas grid (this higher rate runs from 21 July 2026 to 31 March 2027).
- You don't apply for it yourself — your MCS-certified installer claims it and deducts it from your quote upfront, so the price you're shown already reflects the discount.
- Your current system needs to be a fossil-fuel or electric resistance system (gas, oil, LPG, coal, or standard electric heating all qualify).
- The heat pump needs to fully replace your existing system, not sit alongside it as a hybrid.
- Available in England and Wales. Scotland and Northern Ireland run separate schemes.
Grant amounts and eligibility rules do change — the figures above reflect the scheme as of mid-2026. Current confirms the latest position when you request a quote.
Ready to move forward, or just want to talk it through?
Ask Current — survey booking, fit questions, or whether Air-to-Water is right for your home. There is no online checkout and no separate enquiry form; Current captures what we need.
After you request a survey
Air-to-Water installs typically take longer than a single-room Air-to-Air or a home EV charger — heat-loss, emitters and cylinder work are part of the job.
Once you book, you get a Pretium Customer Portal login to track progress and keep certification and documentation in one place. No payment until a formal quote exists after survey.
Questions about Air-to-Water?
- Is Air-to-Water a fixed online checkout price?
- No. The page shows a guide from £6000 after the Boiler Upgrade Scheme grant. Radiator sizing, cylinder and heat-loss vary per home — a survey and heat-loss calculation produce the formal quote.
- Do you install R32 Air-to-Water heat pumps?
- No. Pretium installs R290 only for Air-to-Water, as a quality and future-proofing decision — not as one option among several refrigerants.
- Is Air-to-Water the same as Air-to-Air?
- No. Air-to-Water feeds radiators or underfloor heating and domestic hot water via a cylinder — the boiler-replacement path. Air-to-Air heats and cools room air and does not normally provide hot water.
More detail in the Full FAQ.
Also planning Solar PV, battery storage, heating and cooling?
Each package below is a separate offer with its own guide price and survey path — explore when you are ready, or ask Current to help you sequence more than one system.
Save 20% VAT on EV charger installed prices when installed with a qualifying 0% VAT install — Solar PV, battery storage, or ASHP (air-to-air and air-to-water).
EV Charger Installation
from £960
7.4kW home charging, standard installation, fully certified. Save 20% VAT when installed with qualifying Solar PV, battery storage or ASHP.
Explore options →Solar PV & Battery Storage
storage from £5600
Premium hybrid systems — storage first or with Aiko panels (together from £10600). Survey confirms your quote.
Explore options →Air Source Heat Pump — Air-to-Air for heating and cooling
from £1500
Daikin Sensira 2.0 kW wall-mounted single-split from £1500 installed. Heating and cooling for one room — not hot water.
Explore options →
Planning more than one system?
Start with a Whole Home Energy Transition plan — Current can help you sequence solar, storage, heat pump and EV charging around your timescale and budget.