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JamesPa
JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: May 17, 2026
Profile Activity
Topics: 23 / Replies: 4843
AllTopicsReplies
Reply
RE: Same Heat Pump Size, Different Sized Homes: Would One Be More Efficient?

The larger house might turn out slightly more efficient due to increased system volume, but I'm basically on the same page as @majordennisbloodnok.

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump

@davidb I'm presuming you are already running open loop 24*7, no external controls and have turned the weather curve down as far as possible consis...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hoped for improvements not being realised on my Mitsubishi heat pump

@f1p OK noted Without further information about the system I cant really comment with any certainty, all I can do is cite generic statements ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hoped for improvements not being realised on my Mitsubishi heat pump

I have some suspicions (16kW for 340 sq m is not 'energy efficient!') but before I make any concrete suggestions can you please clear some matters up ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Advice on potential HW Cylinder size

They wont have that volume, neither will most others, and the installers interpretation of what Midea say is unconventional to say the least (ie I hav...

4 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Hoped for improvements not being realised

When you say converting the buffer tank, I presume to a volumiser? Did you remove the secondary pump? What happens if run in pure weather compensa...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Advice on potential HW Cylinder size

Firstly its not the coil volume that is normally the issue it's the area, the typical 'requirement' being 3sq m. In principle system volume of the dh...

4 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Compressor attempts start but fails - Nibe Fighter 2005 8kW

@ian21stcent I assume you have checked filters which is a common reason for a range of failure symptoms?

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: If the heatpump can only heat DHW to 50 then what?

From the website I think it's a heat store not a conventional dhw tank. Not a good idea with an ashp and could very likely explain what is happening....

4 months ago
Forum
Domestic Hot Water & Cylinders
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