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Kev M
@kev-m
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Joined: Mar 5, 2021
Last seen: Jan 8, 2025
Profile Activity
Topics: 10 / Replies: 1266
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RE: Vaillant AroTherm 7kW Air Source Heat Pump

My MCS calculation spreadsheet shows a COP of 3.3, which claims to be the 'manufacturers SCOP' I don't know where they got the number from. The MCS ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Install a Grant Aerona 13kW instead of Mitsubishi Ecodan 11.2kW?

Great information @Prunus.

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Install a Grant Aerona 13kW instead of Mitsubishi Ecodan 11.2kW?

@phil-i, you are essentially asking, "should I get a free heat pump now or wait a bit longer and pay for it". Although Grant ASHPs seem to be less...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant AroTherm 7kW Air Source Heat Pump

Yes 😉 The rated kW figure is delivered energy under nominal conditions. Most ASHPs will be able to deliver a bit more and in extreme conditions ma...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Electricity price predictions

I think the scale needed to make it worthwhile is huge. It's not so much the water, it's where you pump it to. If you look at hydro or pumped storag...

4 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Vaillant AroTherm 7kW Air Source Heat Pump

@duncan-mac if your max heat loss is 8kW and you have a 7kW ASHP, what happens when it's really cold? Can the ASHP keep up?

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Government Policy

This sort of thing goes a long way to explain it. Unfortunately a lot of people read this sort of stuff.

4 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Electricity price predictions

That's exactly what I was thinking. Factor in even 90% efficiency for gas and it's even closer. We just need the installation costs to come down a b...

4 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Whilst Regs allow on-off simple thermostats (Nest, Hive, Heatmiser, Honeywell, etc) Installers should never be responsible for failing heat pumps!

I'm not so sure. Anyone installing heat pumps should know how they work. If they do, they will know an ASHP running at 50C with 3rd party thermostat...

4 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: 14Kw Mitsubishi Ecodan ASHP

@RV3 that looks good to me. I assume you have the heating on 24/7 as that's a very high % of heating. I'm about 65% but I have the heating off 12-5am...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Electricity price predictions

It's a high standing charge but I'd be tempted by that. I wonder if it's anything to do with the latest subsidies just appearing in the news?

4 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Buffer tank required? Samsung 12kW heat pump

@riponowl the other thing I meant to say was that some of the ups and downs might be because of DHW. The flow temp seems to shoot up to 55 or so a ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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