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bobflux
bobflux
@bobflux
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Reputable Member
Joined: Feb 22, 2026
Last seen: Oct 15, 2026
Topics: 2 / Replies: 186
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RE: Do I add Air Con or MVHR to existing A2W ASHP?

If you took a cheap monobloc A2W heat pump and put it indoors, it'd do exactly what you want, except look pretty perhaps...

2 months ago
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RE: Flushing system, cleaning and inhibitor

This amount of brown in a 2 year old installation would be very worrying as it would indicate quite a lot of oxygen ingress rusting the inside of the ...

2 months ago
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RE: Flushing system, cleaning and inhibitor

If an old radiator was reused, perhaps it was full of sludge that then spread through the circuit. Are there any points of oxygen ingress into the s...

2 months ago
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RE: Minimum system volume

So far, mine hasn't defrosted yet, and the radiant ceiling was finished last month and isn't connected yet. I'll have to wait for next winter to see h...

2 months ago
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RE: Minimum system volume

The "thermal comfort" we feel is a mix of air temperature and infrared radiation received by the body. This radiation comes from every surface in the ...

2 months ago
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RE: Can I start an argument about buffer tanks please? 🙂

Not a good idea to use just a towel rail during summer for two reasons: 1) Pipes will still radiate heat, either wasting power or making the house t...

2 months ago
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RE: Heat pump running costs – what has actually worked for you?

I installed the air source heat pump in January 2026, it replaced a dead ground source heat pump. I did not use it in the way the forum recommends: ...

2 months ago
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RE: Grant Aerona Air to Water R290 6.5 kW - Quiet Mark and Silent Running

My LG does the same: when turning it on, it's below the flow temperature setpoint, because the water cooled down. So it goes "Oh no we're too cold, le...

2 months ago
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RE: Can I start an argument about buffer tanks please? 🙂

Assume flow from the heat source is higher than flow to the load. 1- Left is what happens "in theory on paper". 2- Middle is what actually happens...

2 months ago
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RE: Can I start an argument about buffer tanks please? 🙂

You don't have to run the heat pump with a deltaT of 5°C, you can just run it at deltaT 10 or more, with lower flow rate. 5°C is a bit more efficient,...

2 months ago
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