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GrahamF
GrahamF
@grahamf
Member
Estimable Member
Joined: May 2, 2025
Last seen: Sep 15, 2026
Topics: 6 / Replies: 124
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RE: Volumiser required on Grant R290 air source heat pump?

I have a Grant Aerona R290 15.5kW heat pump, which is running very nicely. Certainly don't go for the Aerona3 R32 heat pump or its antiquated control...

8 months ago
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RE: Volumiser required on Grant R290 air source heat pump?

@jamespa I agree that it is important to avoid a 4 port buffer or low loss header, due to the impact on efficiency. My understanding is that volumis...

8 months ago
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RE: Same Heat Pump Size, Different Sized Homes: Would One Be More Efficient?

I would agree with your view that the larger house will be less efficient. The basis for this is: There might be longer pipe runs outside the hea...

8 months ago
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RE: Heat Pump Heats the House… But It’s Not Cosy. Emitter Changes or System Tweak?

@toodles interesting suggestion, thanks. I will try to resist the temptation to hijack someone else's topic to solve my problems!

10 months ago
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RE: Advice on internal circulation pump noise

@jtg while you are checking the plumbing of the buffer tank, make sure the flows are at the top and the returns are at the bottom. Mars explains in t...

10 months ago
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RE: Advice on internal circulation pump noise

I agree with @jamespa that your buffer tank and secondary pump may not be required at all. I have a 1960s two storey house with 30 radiators. I have...

10 months ago
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RE: Heat Pump Heats the House… But It’s Not Cosy. Emitter Changes or System Tweak?

A quick Google search showed that building regulations have required floors to be insulated since 1990, so you should have some. However, your floor ...

10 months ago
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RE: Diagnostic Data Needed for Repeatedly Failing Tesla Powerwall 3 System

@batpred I installed Home Assistant on my MacBook Pro last night. This is just a temporary platform for me to learn about it. I tried to use the Tes...

10 months ago
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RE: Diagnostic Data Needed for Repeatedly Failing Tesla Powerwall 3 System

@batpred thanks very much for your help. I rang Tesla support and he sent me the SSID and password of the lead Powerall. I downloaded the diagnostic...

10 months ago
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RE: Grant Aerona: Is there a setting to keep the 2-port valve open during pump blockade

@unsure you make an interesting point about longevity. Most of what I have read and heard says that compressors are worn out most by starting up and ...

10 months ago
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RE: Grant Aerona: Is there a setting to keep the 2-port valve open during pump blockade

I have a Grant Aerona 290 15.5 kW with the Smart Controller. I have radiators throughout the house and no underfloor heating. I am running on Shift ...

10 months ago
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