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Last seen: Sep 5, 2026
That's odd, you should be able to set 3 or 4 levels of quiet in the installer menu. Mitsubishis also have an Eco mode for DHW, you might want to tr...
@davidalgarve Much bigger heat pump than us but still a surprising amount of power, do you have it in Eco mode? Or use quiet mode? If it uses 3kW ...
Most batteries are what is known as DC-coupled, which means that they use the solar inverter to convert their DC voltage to AC used in your house. So ...
Cosy has the 3 hours of peak rate and the day rate is appropriately 1.5p per hour more - which is appropriately equivalent to another hour and a half ...
142L is not very big but if you don't use much DHW then it's worth seeing if only one DHW reheat a day works. Do you have a battery with your solar...
We also have a FTC7 and a newer R290 Mitsubishi heat pump. There are prohibits for heating and DHW, to schedule the DHW you want to prohibit the DHW f...
I would suggest: Mag filter last on return so it filters out stuff before it gets to the outside unit. Do you also have a strainer in you system? ...
I don't know if the FTC6 and FTC7 are different in this respect but the FTC7 rounds up and down as you would expect (no odd .38 and .53 rounding point...
@westkent Almost, the wireless controller just becomes a limiter, if the internal temperature goes 1C above the set temperature then the heat pump w...
When on WC the WC curve controls the heating based on the outside temperature. You can use schedules for DHW (hot water) though. What are you trying t...
A few Mitsubishi figures from their data book for comparison... 5kW output at 12C OAT: 5kW unit is COP of 6.15 11.2kW unit is COP of 5.9 ...
To quantify the greater pressure drop of your corrugated pipe you could try using an online calculator like For example, at 20 l/min a 25.4mm corrug...
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