Installed by Ecowatt · 30+ years of experience
Air-to-water heat pump: your most comfortable step to lower energy bills
An air-to-water heat pump draws free heat from the outside air to warm your radiators, underfloor heating and domestic hot water. The efficient replacement for your gas or oil boiler — grant-eligible and installed by Ecowatt.
Free on-site visit +32 15 62 70 80Free & no obligation · Reply within 24 h
Heating and hot water
Works with radiators or underfloor heating
High efficiency (up to A+++)
Up to ~4× more efficient than a conventional boiler
Grants + 6% VAT
We calculate your grants and apply 6% VAT
30+ years of experience
An experienced heating and HVAC team
Why an air-to-water heat pump?
The most popular heat pump for the Belgian home: efficient, grant-eligible and easy to combine with your existing heating.
A lower energy bill
For one kWh of electricity the heat pump delivers up to 4 kWh of heat. You replace expensive gas or oil with efficient electricity use — even more so with solar panels.
Complete comfort
Heating via your radiators or underfloor heating and domestic hot water, with one unit. Many models can also cool passively in summer.
Replace your gas or oil boiler
Future-proof and low-CO2. A hybrid setup with your existing boiler is possible for the coldest days.
How does an air-to-water heat pump work?
An air-to-water heat pump uses the outside air as a free heat source and brings that heat into your home via your heating water — unlike an air conditioner (air-to-air), which works directly through the air.
An outdoor unit extracts heat from the outside air, even at low temperatures.
That heat goes via water to your radiators, underfloor heating and hot-water tank.
Works with existing radiators; best with underfloor heating or large radiators.
A hybrid combination with your current boiler is possible.
Grants and 6% VAT
An air-to-water heat pump is often grant-eligible, depending on your region and home. For homes over 10 years old the reduced 6% VAT rate usually also applies. We calculate everything correctly and apply it to your quote.
How your project unfolds
Four clear steps, with one point of contact from start to finish.
Free on-site visit & advice
Within 7 days. We assess your home and heating and determine the right capacity.
Quote + grant calculation
A clear, no-obligation quote with the grants and the 6% VAT rate already factored in.
Installation by Ecowatt
Our experienced technicians install the heat pump neatly, usually in 3 to 5 days.
Commissioning & aftercare
Professional commissioning by a certified technician. After that, we remain your point of contact for maintenance and service.
Frequently asked questions
Everything you want to know before choosing an air-to-water heat pump.
Often yes. An air-to-water heat pump works best at lower water temperatures (underfloor heating or large radiators). During the visit we check whether your radiators are sufficient or need adapting.
Yes. Modern air-to-water heat pumps work well below freezing. In extreme cold, a hybrid setup with your existing boiler can assist.
In many cases yes, depending on your region and home. We calculate your grants and apply them together with the 6% VAT rate on your quote.
Many air-to-water models can cool passively or actively via underfloor heating or fan coils. If cooling is your priority, an air conditioner (air-to-air) is often the better choice.
A typical installation takes 3 to 5 days, depending on your home and whether the heat emitters need adapting.
For homes over 10 years old, the reduced 6% VAT rate usually applies to the installation. We apply it correctly.
Ready to make the switch?
Free on-site visit within 7 days, with a grant calculation. No-obligation advice tailored to your home.
Book a free visit +32 15 62 70 80