Extended Ecodan R290 range announced

Mitsubishi Electric announced in April 2025 that it has extended its Ecodan R290 heat pump range, adding 8.5kW, 10kW and 12kW models to the 5kW and 6kW units launched in October 2023¹. The company has also said it will begin phasing out its Ecodan R32 heat pumps, which will be replaced by the extended R290 range².

The new models are aimed at larger homes and properties with higher heat loss¹. Mitsubishi Electric says the units deliver flow temperatures of up to 75°C, which it describes as making them suitable for properties that cannot undergo extensive fabric upgrades or insulation improvements, and that they are compatible with existing microbore pipework, so a switch to a heat pump does not require major system overhauls¹. The company states the range operates in ambient temperatures as low as -25°C².

On the refrigerant, Mitsubishi Electric gives the global warming potential (GWP) of R290 as 0.02 and describes the pump as manufactured in the UK². The units carry Quiet Mark accreditation, and the company says the range is compatible with all Ecodan cylinders and includes its Flow Temperature Controller 7 and MELCloud connectivity¹. The rules covering R290, R32 and F-Gas set out how these refrigerants are classified.

Joanna Crown, Product Marketing Manager at Mitsubishi Electric, said:

"The expansion of our Ecodan R290 range reaffirms our commitment to providing cutting-edge, energy-efficient heating solutions for UK households. With the ability to deliver high temperatures and operate efficiently even in extreme cold, these heat pumps offer a practical and sustainable alternative for a wide range of properties."

The two announcements give different dates for the range extension. The April 2025 page presents the 8.5kW, 10kW and 12kW models as newly added¹, while a later page dated 12 June 2025 says the extension was announced "in April" and frames the same page around the R32 phase-out². The June page also refers to "Quite Mark accreditation" where the April page says "Quiet Mark"². No timetable for the R32 phase-out, and no prices for any of the models, have been reported².

Why it matters for households

A heat pump's output has to match a home's heat loss, and the previous Ecodan R290 line topped out at 6kW, which suits smaller or well-insulated properties. The larger outputs widen the pool of homes the range can serve, including older and larger houses where a full fabric upgrade is not planned¹. The claim of 75°C flow temperatures matters for homes still running radiators sized for a boiler, because higher flow temperatures reduce the need to replace emitters, and microbore pipework compatibility removes another common barrier to a system change¹. For a household weighing up a move away from a gas boiler, the practical questions are whether the unit's output covers the property's heat loss and whether the existing pipework and radiators can carry the heat, both of which are assessed in a heat pump survey. The refrigerant choice also bears on F-Gas rules and on future servicing, since R290 is a natural refrigerant with a GWP the company puts at 0.02².

What happens next

Mitsubishi Electric has said it will begin phasing out its Ecodan R32 heat pumps and replace them with the extended R290 range². No date for that phase-out has been reported².

Sources2 cited

1. [](https://les.mitsubishielectric.co.uk/latest-news/mitsubishi-electric-unveils-growing-ecodan-r290-heat-pump-range-the-future-of-home-heating), les.mitsubishielectric.co.uk
2. [](https://les.mitsubishielectric.co.uk/latest-news/new-news-pagemitsubishi-electric-announces-transition-from-ecodan-r32-to-the-new-extended-range-of-ecodan-r290-heat-pumps), les.mitsubishielectric.co.uk