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Mitsubishi Ecodan not good enough ?

Goody · 2022-12-15T10:36:53Z

Hi We used to heat our 1930's, well insulated, underfloor heated (with upstairs rads) home with a gas boiler set at 55c flow temp. Since we had an Mitsubishi Ecodan 8.5KW heast pump fitted in March 2021-June 2021, by an incompetent company - Hero Renewables, we struggle to get anywhere near a comfortable room temperature. Since the installation Hero Renewables had been on BBC's Rip Off Britain and have thankfully ceased trading. Outside, a very chilly -6C inside a very chilly 12C! I know we are in a cold snap with the weather, but last year we struggled when it went below 0C. The pump is continuously on and we are hitting record daily electricity usage everyday since last week Are we expecting too much? I am so glad we kept the dirty coal fire!! I am starting to decide which rooms we can sacrifice for the greater good, which is quite difficult when it is a full house. I am thinking that the heat pump was undersized for the property, and we can either get a larger heat pump, but, someone will have to do some hard selling for me to be convinced that a larger pump will solve all our problems with cold rooms and extortionate electricity costs, or, go back to a gas boiler I am waiting to hear back from Mitsubishi to hear what they suggest Any ideas would be appreciated Thanks

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Air Source Heat Pumps (ASHPs)

Last Post by Batpred 2 hours ago

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Batpred

(@batpred)

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Joined: 1 year ago

Posts: 845

11/05/2026 5:57 pm

Posted by: @bobflux

↑

.. Thus the heat pump is mostly an empty box full of air. ..

Yes, but...

90Kg will include a bit more than air, and once in use also the circulating water and other bits and pieces.

This post was modified 1 hour ago by Batpred

8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC

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