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cathodeRay
cathodeRay
@cathoderay
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Joined: Feb 28, 2022
Last seen: Aug 11, 2025
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Topics: 17 / Replies: 2075
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RE: Outcome for 2024 - with Agile, ASHP, PV, Batteries, EV

That suggests a possible modbus connection. If you have or can get a service manual for your particular heat pump model, you might be able to find out...

7 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Double heat pump for DHW?

There is another option. Have a bath once a month (whether you need it or not).

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Outcome for 2024 - with Agile, ASHP, PV, Batteries, EV

This appears to be another example of heat loss calculations over-estimating heat loss significantly, something that old buildings appear to be prone ...

7 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Best control strategies for heat pumps that are way oversized

If I have read and copied the Midea data tables correctly, I am not sure I can see much 'efficiency' difference between a smaller heat pump running fl...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best control strategies for heat pumps that are way oversized

Midea and I suspect other manufacturers do have detailed tables of heat pump outputs and i suspect it should in theory at least be possible to compare...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best control strategies for heat pumps that are way oversized

I am not sure we fully understand either the supposedly harmful or indeed the potentially beneficial effects of cycling, eg when a heat pump uses it t...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best control strategies for heat pumps that are way oversized

Not to mention python scripts, but a room stat / timer solution is the sort of thing people can set up without complex knowledge of heat pump controll...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Best control strategies for heat pumps that are way oversized

Can't a room stat with timer achieve that? It would need enough on/off times per 24 hours, then just set the desired temp very high/very low. HDHD (...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat loss calculators and spread sheets

I think it is possible installers may consciously or subconsciously welcome this, because it allows them to over-size on the back of what looks like a...

8 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculators and spread sheets

Here is my data for the last heating season, a simple plot of hourly OAT against energy out (delivered to the house), for all hours in days without a ...

8 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculators and spread sheets

The empirical method is actually quite simple, and it gives you a clear answer, as long as you use data from a period when the indoor air temp (IAT) s...

8 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Getting the best out of a heat pump - is Homely a possible answer?

Fair point. Still a red flag, but there might be reasons why you can put it away.

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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