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robl
@robl
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Honorable Member
Joined: Mar 23, 2022
Last seen: Apr 24, 2025
Profile Activity
Topics: 1 / Replies: 202
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RE: Knowing a system will work before we commit to it

If you have a smart meter, you can get the information you need from it. Look back over the last year for the greatest daily gas used in kWh. Divide...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Looking for a GSHP installer

@heacol I believe that Kensa offer cooling, as an add on option. The Vaillant Geotherm mini (2.5kW heat) has it in by default I believe, so "just"...

3 years ago
Forum
Grounds Source Heat Pump (GSHPs)
Reply
RE: Samsung Launches the EHS Mono HT Quiet – A High Temperature, Low Noise Heat Pump Ideal for Home and Building Renovations

@iancalderbank I think I read off the COP numbers wrongly from the graph in my last post- trying a bit harder, it's COP=4.2 down to 3.5 from a 5C D...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung Launches the EHS Mono HT Quiet – A High Temperature, Low Noise Heat Pump Ideal for Home and Building Renovations

@iancalderbank @Jeff DT is just the temperature of flow-return, and Heatpumps only care about the flow temperature - if you would like a DT of 20C, ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung Launches the EHS Mono HT Quiet – A High Temperature, Low Noise Heat Pump Ideal for Home and Building Renovations

@iancalderbank Gas boilers can have a high DT as the efficiency of them is governed mostly by the return water temperature. So long as the return ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Questions about V2G, V2H and V2Everything

@mattengineer We have 4kWp of solar, dno informed, about 9 years ago. PV is brilliant, if you haven't got, get as much as you can fit and the dno ...

3 years ago
Forum
Renewable-powered transport (EVs & e-bikes)
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RE: Questions about V2G, V2H and V2Everything

Here's a 'scope plot of it working. Red is Voltage, Blue current on our mains tail, black is V*I. At the left hand side, there's very low real pow...

3 years ago
Forum
Renewable-powered transport (EVs & e-bikes)
Reply
RE: Questions about V2G, V2H and V2Everything

@mattengineer Yes, we had no trouble getting it changed to V2H. I emailed Indra, they asked me for confirmation that I owned the unit - I did, as ...

3 years ago
Forum
Renewable-powered transport (EVs & e-bikes)
Reply
RE: Heat storage batteries

I really don't understand how something so simple could cost so much. I think "heat batteries" have a place - perhaps (a small unit) in a passive hou...

3 years ago
Forum
Wood Burners, Biomass, Small Scale, Biofuels & Other Heating Alternatives
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RE: Electricity price predictions

All being well, we'll have our gas meter taken out after this winter. Mrs RobL wants 2 heating seasons without gas before it's out to be sure to be s...

3 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
Topic
DIY blower door testing
3 years ago
Forum
Insulation
Replies: 0
Views: 3098
Reply
RE: Electricity price predictions

@diverted-energy In our unusual resource constrained situation, I can't see a helpful way to avoid energy being expensive. If taxes are reduced, a...

3 years ago
Forum
Electricity, Tariffs, Monitoring & Providers
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