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RobS

@robs

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Estimable Member

Joined: Oct 15, 2024
Last seen: Dec 7, 2025

Topics: 0 / Replies: 60

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RE: Mixing of pipework/components' with different internal dimensions - theory vs reality/practical approach

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? ...

11 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: The Definitive Guide to Weather Compensation and Curves for Air Source Heat Pumps

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...

11 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: From Auto adapt to W/C Ecodan

@westkent Almost, the wireless controller just becomes a limiter, if the internal temperature goes 1C above the set temperature then the heat pump w...

11 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: From Auto adapt to W/C Ecodan

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...

11 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Best control strategies for heat pumps that are way oversized

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 ...

11 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Samsung Gen7 setup

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...

1 year ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Minimum ASHP outputs?

Yes, your figures correlate well with your heat pump having a minimum output of about 3kW at these outside temperatures. Have you tried your heat pump...

1 year ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Minimum ASHP outputs?

You have clearly found your system's sweet spot! Yes, radiator based systems are likely to be limited in stable low flow temperatures. But larg...

1 year ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Minimum ASHP outputs?

I'm pretty sure it just means output, using the word capacity in this way isn't unusual in Japanese documents (and if something has a capacity then it...

1 year ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Minimum ASPH outputs?

As far as I know yes.

1 year ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Minimum ASPH outputs?

@johnmo The effect of cycling is very different with different heating systems too. If modulation was not an important factor heat pumps would still...

1 year ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Minimum ASPH outputs?

@tomasmcguinness Mitsubishi's figures are in(I'd suggest downloading it and reading it offline as it's a 400+ page PDF). For their new R290 ASHPs se...

1 year ago

Forum

Air Source Heat Pumps (ASHPs)

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