Brand guide · Updated 8 November 2026
Mitsubishi Electric air to air heat pumps
Mitsubishi Electric makes both kinds of heat pump, which causes confusion. Ecodan is its air-to-water range for radiators and hot water. Its air to air heat pumps are the split systems sold for heating and cooling, including wall-mounted ranges such as the Zen (MSZ-LN) and MSZ-AY, plus multi-split, floor and ducted options.
Ecodan or air to air?
| Ecodan | Mitsubishi Electric air to air (split systems) | |
|---|---|---|
| Heats | Water for radiators, underfloor and hot water | Air in each room |
| Cools | Not usually in UK homes | Yes |
| Grant | £7,500 | £2,500 |
If you search "Mitsubishi air source heat pump", most results are about Ecodan. If you want warm air from wall units and summer cooling, you're looking at their split systems.
Example ranges
- Zen (MSZ-LN): design-led wall unit available in several colours
- MSZ-AY: standard wall unit
- Multi-split outdoor units that run several indoor units
- Floor-standing and ducted indoor units for rooms where wall units don't suit
Before you choose a model
- Compare the heating SCOP on the energy label, not the cooling figure.
- Check heating output at low outdoor temperatures on the spec sheet.
- For the £2,500 grant, check the exact model is listed for air to air on the MCS product directory, and that your installer is MCS certified for air to air.
- Ask whether the warranty is longer when fitted by the brand's approved installer, and what servicing it needs.
Model ranges change often. We list examples to help you search, not as recommendations. Check current models and specifications with the manufacturer or your installer.
Other brands
Comparing brands? See how to choose the best air to air heat pump.
Questions
Is Mitsubishi Ecodan an air to air heat pump?
No. Ecodan is Mitsubishi Electric's air-to-water range. Its air to air heat pumps are the split systems with wall, floor or ducted indoor units.
Can I get the £2,500 grant for a Mitsubishi Electric air to air heat pump?
Yes, if the model is MCS listed for air to air, your installer is MCS certified for air to air, and you meet the scheme conditions.
Sources
- MCS: Update on the implementation of air-to-air heat pumps into MCS (13 Apr 2026)
- GOV.UK: Boiler Upgrade Scheme, what you can get
Checked 8 November 2026.