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JohnR
@johnr
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Estimable Member
Joined: Nov 25, 2024
Last seen: Apr 8, 2025
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Topics: 0 / Replies: 106
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RE: Yet another government reverse ferret - flakey grids and property lobbies

There should be a requirement for new build housing to be heat pump ready even if they are sold with gas combi boilers. By "heat pump ready" I mean pr...

10 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Battery...Full house back up

One detail that you may want to consider is the warranty on the battery. I recall that the warranty (minimum 70% storage capacity aftre 10 years) for ...

10 months ago
Forum
Energy Storage
Reply
RE: ASHP and how it should run and potential kw consumption?

Vaillant's specs indicate an operating pressure between 0.5 and 2.5 bar for the 10kW Arotherm PlusInconsistently, the specs for my 7kW unit say 0.5 to...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Double heat pump for DHW?

Persuading a couple of people to have showers in the evening instead of the morning would reduce the problem. A quick face wash in the morning is quic...

10 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: ASHP and how it should run and potential kw consumption?

I've got a 7kW Arotherm Plus which is currently using 1133W with a 31C flow temp and -2C outside. This is with a 0.5 heat curve setting and target roo...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Trying to work out COP

If you are in the Algarve (as your forum name suggests) then the daily temperature range isn't very big. Heating the DHW to 50C with an outside temper...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Trying to work out COP

No. COP relates to the efficiency of energy out of the heat pump vs energy in. Flow temperature is a key factor as less work is needed to raise the wa...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New 5kW Samsung Gen6 heat pump owner with loads of questions

This is what I've assumed for my Vaillant heat pump and it's definitely the basis of their efficiency number. However, it's got me thinking. Does all ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Samsung 12KW Heat Pump Help

FWIW, the Vaillant app gives the energy efficiency (=COP) as (total heat generated including heat pump energy used)/ energy used. See this screenshot....

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Legionnaires' Disease & Home Hot Water: Understanding Risks and Prevention

I think that legionella is a much bigger risk if the DHW system has an open tank in the loft (as used to be the common practice in British homes) wher...

11 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Shouldn't the headline be My Heat Pump costs 40% more to run than the Gas boiler it replaced The heat pump energy input (kWh, I assume) is only about...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: MCS heat pump pre-sale information and performance calculation

I would agree that knowing the peak daily gas consumption is useful, but not the peak hourly or half hourly as the underlying philosophy for efficient...

11 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
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