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GrahamF
GrahamF
@grahamf
Member
Estimable Member
Joined: May 2, 2025
Last seen: Apr 20, 2026
Profile Activity
Topics: 6 / Replies: 115
AllTopicsReplies
Reply
RE: Should Our Water Circulation Pump Be Configured to Run All The Time?

@jamespa I tried both settings. Pump blockade definitely controls the whether its internal water pump stops when the compressor stops. The energy...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Should Our Water Circulation Pump Be Configured to Run All The Time?

@iaack I could still use weather compensation to control the flow temperature, even with Pump Blockade = Yes, but the room thermostat in the Grant Aer...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Should Our Water Circulation Pump Be Configured to Run All The Time?

@dgclimatecontrol just to clarify, the water pump is inside the heat pump. It is controlled by the Grant Smart Controller that also contains a thermo...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Should Our Water Circulation Pump Be Configured to Run All The Time?
6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 26
Views: 3189
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

Yes that is a very fair point. I was thinking of the situation where you really need a 10kW heat pump, but install a 12kW or 16kW. Other items could...

6 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

@jamespa thanks for sharing your analysis. We have a commercial scale gas meter installed. We used to have two boilers, but then moved to a single 4...

6 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face

@ashp-bobba wow that is such a professional approach. I am really impressed!

6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

Yes, I agree with your points. However, the risks are different in nature. If you oversize a heat pump, then the risk is that it is less efficient. ...

6 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

@batpred I suspect there is probably a heat pump owner maturity curve. People start by trying to get the last 5% efficiency out of the system. The...

6 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

@jamespa I am really impressed that your heat loss estimate was so accurate. May I ask what kind of house you live in? In winter, when we had the g...

6 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

@jamespa yes, I agree it doesn’t need to be perfectly accurate - only enough to ensure you size the system to a reasonable level. Do you now have fir...

6 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face

@Fiona obviously redact any sensitive information.

6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
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