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Johnmo
@johnmo
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Noble Member
Joined: Jan 25, 2023
Last seen: May 23, 2025
Profile Activity
Topics: 2 / Replies: 537
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RE: Antifreeze Valves

Not correct, if you use inhibitors or glycol then VDI 2035 is not applicable to your system. You are using a different system. My heat pump instructio...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Antifreeze Valves

Think you need a lot of hours to cause any issues. There is an article on here suggesting 12 or hours in a freezer. A slow drip overnight is quit...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: The good, the bad and the not that great – my heat pump installation

If you have a buffer you have a primary and secondary circuit. The primary circuit is the ASHP and buffer. Your flow sensor is in the primary circuit ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Antifreeze Valves

I went a completely different route VDI2035, no antifreeze valves. System run WC mode all the time, circulation pump always on. Have battery so mi...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: The good, the bad and the not that great – my heat pump installation

But with soak away also, otherwise you will have a big chunk of ice that gets deeper every day below zero. I would remove soil under gravel Wh...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Looking for help with a Mitsubishi FTC2BR controller

Just to show you what occurs when you switch from DHW heating - max flow temp 60 degs. Within about 40 secs the flow temperature drops from 60 to ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Looking for help with a Mitsubishi FTC2BR controller

Maybe not the most efficient way to run your heat pump. Your trimming is just done by balancing the loops. Instead of off or on commands from the ther...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Simulation of ASHP with Gas boiler as part of decision process

10mm pipe is ok for about 1kW at dT5. So really depends how the system is laid out and how you transition to 10mm and the other piping sizes. Lots of ...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Simulation of ASHP with Gas boiler as part of decision process

Can you upgrade to to type 33?

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Getting the best out of a heat pump - is Homely a possible answer?

Buffer tank and LLH are pretty much the same thing, just the contained volume of water is different. So you should be able to install exactly the same...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Mitsubishi PUHZ-SW120 ASHP & Buffer Tank

Think looking at the two curves, you will be near enough using the Grundfos one.

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: British Gas versus Octopus: Two possible heat pump routes - how to evaluate them?

@ivanopinion you must of spent ages come up with some vague numbers like that. You didn't even allow for DHW heating

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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