Air-to-Water Heat Pump: Complete Guide 2026
How does an air-to-water heat pump work?
An air-to-water heat pump captures the heat energy present in outdoor air and converts it into usable heat.
Its operation is based on a 4-step thermodynamic cycle:
- capturing heat from outdoor air
- compressing the refrigerant fluid
- transferring heat to the water circuit
- distributing heat throughout the home
The heat produced then feeds:
- your radiators
- your underfloor heating
- your domestic hot water
Result: you heat your home using energy that is largely free and renewable.
What savings can you achieve with an air-to-water heat pump in 2026?
An air-to-water heat pump consumes on average 3 to 4 times less energy than conventional electric heating.
In concrete terms, savings can reach:
- up to 60% on the heating bill (particularly when replacing electric or oil heating)
- a return on investment generally between 6 and 12 years, depending on grants and the project
- an increase in property value
Performance varies according to several key factors:
- the level of insulation in the home
- the sizing of the heat pump
- the existing heating system (radiators, underfloor heating, etc.)
- local climate conditions
A preliminary assessment is essential to accurately estimate the gains.
An ecological (and strategic) choice
Heat pumps use a renewable energy source: air.
They make it possible to:
- significantly reduce CO₂ emissions
- limit dependence on fossil fuels
- anticipate future energy regulations
Reliable performance even in extreme cold
Our WAO R290 heat pumps are designed to deliver reliable performance even in extreme winter conditions.
Our models can:
- operate down to -25°C outdoor temperature
- produce water up to 70°C, even in sub-zero temperatures
- provide home heating without significant loss of performance in winter
Result: a solution perfectly suited to renovation projects, including on existing radiator networks.
R290 : a choice of performance and responsibility
R290 (propane) is today one of the most environmentally responsible refrigerants on the market:
- extremely low environmental impact
- excellent energy efficiency
- a solution aligned with upcoming regulatory changes
- performance maintained even at low temperatures
Why choose Warmeo?
At Warmeo, we design heat pumps built for energy renovation, with a high level of technical and aesthetic standards.
- R290 (WAO) and R32 (WHL) technologies
- Operation down to -25°C outdoor temperature
- High-temperature hot water production up to 70°C
- Monobloc design for simplified and reliable installation
- In-house technical expertise for complete performance control
- Clean design conceived for discreet integration in any environment
- Ultra-quiet operation for everyday comfort
Every unit is developed with one strong requirement: combining energy performance, acoustic comfort and durability — without compromise.
