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Mitsubishi vs Daikin heat pumps
The two highest-volume brands in UK heat pump retrofits.
Mitsubishi’s Ecodan and Daikin’s Altherma 3 are the two most widely installed air source heat pumps in UK homes, both typically quoting £8,800–£13,000 installed in 2026. Ecodan is known for reliable cold-weather output and strong service coverage, while Altherma 3 usually edges it on quoted price and split-system flexibility.
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Mitsubishi Ecodan strengths
- Consistent output at low outdoor temperatures.
- Widely stocked spares and a large trained installer base.
- Simple, well-understood controls with good weather compensation.
- Packaged cylinder options that simplify plant space.
Daikin Altherma 3 strengths
- Competitive pricing across output sizes.
- Split and monobloc options for constrained plant positions.
- Integrated app control and monitoring.
- Very wide MCS installer availability.
The deciding factors
Ask each installer for the MCS performance estimate at your design flow temperature. Differences between these two brands in a real quote are usually smaller than the difference between a 45°C and a 50°C design in the same house.
Also weigh local service coverage. A brand with an engineer thirty minutes away is worth more than a marginal efficiency figure.
Frequently asked questions
- Which is better, Mitsubishi Ecodan or Daikin Altherma?
- Both are mainstream, well-supported choices. Ecodan is favoured for cold-weather consistency and service coverage; Altherma for price and configuration flexibility.
- Are their running costs different?
- Marginally. System design and flow temperature affect running cost far more than the choice between these two brands.
- Which has the better warranty?
- Both offer extended warranties when installed and registered by an approved installer; check the exact term on your quote.
- MCS Certified — Installer certification scheme required for grant eligibility.
- Energy Saving Trust — Heat pump efficiency, running cost and SCOP benchmarks (UK).
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