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Johnmo
@johnmo
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Noble Member
Joined: Jan 25, 2023
Last seen: May 20, 2025
Profile Activity
Topics: 2 / Replies: 524
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RE: Advice for ground source heat pump in new build with PV and batteries

You still.need all the air inlets - So air bricks that cannot be closed, to comply with the rules, open 365 days for 5 days of open fire? Sorry that's...

2 weeks ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Advice for ground source heat pump in new build with PV and batteries

So why waste your money on MVHR? You aren't airtight so why not MEV or dMEV? You need ventilation bricks etc in walls MVHR is a bit of a nonsense and ...

2 weeks ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Yes, the "zoning with ASHP" topic again...

Have configured the hybrid based on cost of running mostly. Tried a few different configurations and every time I found the heat pump and boiler cou...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Plate heat exchanger considerations

Do an air test on them then you will know. Passes test they are fine. If it fails it would have done pretty soon anyway. A pressurised system will onl...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Plate heat exchanger considerations

There are sizing calculators online. The basics are the the higher the temperature the smaller the PHE can be. The PHE in a combi boiler is pretty sma...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Plate heat exchanger considerations

You are sitting on a ticking bomb, which isn't going to do you any favours at some point. Good chance the pipe is too small as well (?). I would bit...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Advice for ground source heat pump in new build with PV and batteries

We are at 192m² living space, and our house requires 3.5kW at -9. If we built to minimum building regs that number jumps to about 5kW. So a little con...

2 weeks ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Yes, the "zoning with ASHP" topic again...

Just for clarity, the system will only run with the ASHP as you state, but does do DHW with cooling on operation. The ASHP just switches from cooling ...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Yes, the "zoning with ASHP" topic again...

I think your first post the one I reacted to wasn't as clear in how and why. The NRG system I have looked at in quite a bit of detail and understand t...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Yes, the "zoning with ASHP" topic again...

We have around 50m² of glazing on the south side, 100mm concrete floor with UFH. We can get huge solar gains if we are not careful. We run circulation...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Tariff and charging strategy advice please

Is being decommissioned this year for anyone who has missed it. Later this year they will no longer work, so YOU HAVE TO contact your supplier - or yo...

2 weeks ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: why solar diverters for HW instead of the heat pump?

For me there are few factors why you may want to heat water via excess PV. 1. You don't get any money for export. 2. You do get money, but because...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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