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robl
@robl
Member
Honorable Member
2570 kWhs
Joined: Mar 23, 2022
Last seen: Mar 4, 2025
Topics: 1 / Replies: 198
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RE: Questions about yearly heat pump maintenance

There’s usually a survey, to check if the boiler/heating works, but it’s written as ‘can’t check’ unless it’s actually running when there’s a flying v...

2 years ago
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RE: Heat pump and a solar diverter. Is it logical?

iBoost (and other diverters) are tricky to make work well with home batteries. If you have a home battery, you are likely to use a smart tariff - ...

2 years ago
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RE: Octopus Energy Heat Pump Quote

@iancalderbank The code is entirely running in a loop; it measures flow rates, temperatures, then electicity meter pulses, then does it again. The...

2 years ago
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RE: Octopus Energy Heat Pump Quote

@squeakysim The monitoring is all my own 😎 Two off +/-0.1C temperature sensors, each in copper "pockets", and a flow meter, and a little embedded...

2 years ago
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RE: Replacing a gas boiler with a heat pump is "irrational"

I agree that it's unlikely that with the present electricity/gas cost ratio that heatpumps are "financial rational", which is the premise of the link....

2 years ago
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RE: Octopus Energy Heat Pump Quote

Mixergy tanks I believe work by forcing statification - hot water is pushed into the top of the tank, and there is a clear hot / cold divide line. In...

2 years ago
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RE: Vaillant flow rates, Delta T, buffer sizing - trying to get ASHP running well but hit a brick wall.

The temperatures that you mention are all quite low, which is great for efficiency (but not for a warm house when it's cold out). What really matters...

2 years ago
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RE: Smart metre installation – seamless or a potential nightmare?

Our smart meter install with OVO went fine. It's a lot bigger than the old meter we had before, but there was space. I find it more awkward to read ...

2 years ago
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RE: Worcestershire ASHP

Hi Pat! We have a tiny 2.5kW(thermal, 660W elec) gshp, 4kWp solar, MVHR, 150mm EWI, 30kWh V2G car, 200l DHW tank, 4 bed highly insulated retrofit ho...

2 years ago
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RE: Air source heat pump with ground air pre heat

I think that did use to be a thing, but it is fraught with difficulty. Mice getting in, mould, stagnent water pools. All of these can be tackled - g...

2 years ago
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RE: Low profile wet underfloor heating

I think you can make a pretty good guess that any floors installed prior to 1991 will have no insulation. A bit of googling gave U values over time (...

2 years ago
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RE: Adding battery storage to solar with ASHP

Hard to imagine how a hybrid inverter would be ok here. Imagine you got an Octopus Go tariff, charged up the batteries at cheap rate. Then discharge...

2 years ago
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