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Johnmo
@johnmo
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Noble Member
Joined: Jan 25, 2023
Last seen: May 22, 2025
Profile Activity
Topics: 2 / Replies: 533
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RE: ECODAN ASHP General Set-up and efficiency.

Not the best option for ventilation! You will end up with a house that hot and stuffy, the stuffy feeling isn't because it's hot, its rubbish air qual...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Emptying our Aira system while radiators and pipes are moved?

If it's for domestic heating systems it's not toxic at all. It's not the same as car antifreeze. The chemist used in a domestic heat system is Food ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan thoughts please: QUHZ-W40VA takes longer than I would like to revert back to heat mode following a DHW cycle

That may be your issue. You have hot water sitting in, I assume is an insulated pipe, so it will not cool quickly. If your pump runs when ever there i...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Draining and refilling ASHP.

Your heat pump will give you a water spec to follow. For reference this is what mine says

7 months ago
Forum
DIY
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RE: Ecodan thoughts please: QUHZ-W40VA takes longer than I would like to revert back to heat mode following a DHW cycle

So I suppose the real question is you house cooling down to much or are temps ok? How is the circulation pump operated on all the time?

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung Gen6 Room temp vs Outlet temp

To set up weather compensation or water law. You start with a base curve and them manipulate it over a period of time. Warm weather setting. At 20...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Circulatory pumps and weather compensation

If the pump is PWM controlled, flow rates will be adjusted automatically by the heat pump, most pumps aren't though. So you need to set the flow rates...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Moving from two zone to single (open) / how to select a circulation pump - advice please

You need to get an idea of pipe size and length and number of bends etc. Look at current secondary pump current settings. Where it sits speed wise....

7 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Minimum ASPH outputs?

I would be careful you don't fall down a rabbit hole. Modulation seems to vary massively with different heating systems, flow temp etc. irrespective o...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Moving from two zone to single (open) / how to select a circulation pump - advice please

Think you may be thinking too much. So first Has your heat pump got its own pump, if so the plan is to use that and not change it. So to enable t...

7 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: How to Solve Mould and Mildew Issues in Renovated Properties

MEV - Mechanical Extract Ventilation. A central extract unit, that takes damp air out of wet room (bathrooms etc). Demand flow rate, varies flow based...

8 months ago
Forum
Your Home
Reply
RE: How to Solve Mould and Mildew Issues in Renovated Properties

You need to ensure your house is pretty airtight ideally 3ACH or better at 50Pa. Otherwise you are just adding additional ventilation to and from the...

8 months ago
Forum
Your Home
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