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Last seen: May 24, 2026
Hummm....this depends on the type of compressor. For a typical positive displacement compressor (think medical syringe moving backwards and forwards...
@transparent that's a great diagram to share, it shows the design trade off that go into system specification. Suppose we required 4kW of power to ...
This thread is great! What do people mean by efficiency? It's a word that's often quoted in relation to heating systems, but do people really under...
@jamespa please can you share the details of the fan coil you used. Thanks Bob
@cathoderay you're very welcome. If your living room radiator got warm when you had the system balanced with the lock shield valves pinched in then ...
I was wondering how you were getting on. Are the pipes to living room radiator in a concrete floor? Do they have insulation? You're probably loosin...
An old thread, but please can the default subscription setting be set to "none". My email inbox is rapidly filling up with spam from this forum. I h...
Just dug this up with google A properly designed buffer vessel shouldn't be impossible to achieve. Bob
So, I'm thinking out loud here - this is a way I often approach solving complex problems: I've got a house at 10C and I turn on the heating. Where ...
I don't own a heat pump, unless you count a fridge freezer. But it does appear as though the defrost operation of ASHPs isn't often spoken about. It...
Yeh, I did really didn't I. Regards Bob
Evening...I got the spreadsheet. Blimey, there aren't many people I know who know how to use named ranges - very nice 😉 It'll take me a while to g...
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Latest Posts
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RE: battery storage without solar
I'll illustrate that Bypass Mode like this: ...
By Transparent , 3 minutes ago
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RE: Who's your electricity provider and what's your tariff?
@andris So you have a heavy solid floor, that makes mor...
By Papahuhu , 13 minutes ago
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RE: Tesla Powerwall (2) Calibration Cycles
@papahuhu My loadings in the tariff are not that extrem...
By Toodles , 20 minutes ago
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RE: DIY Heat Pump Installations: Navigating Legal and Regulatory Hurdles
The source legislation is here and is definitive The ...
By JamesPa , 2 hours ago
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RE: Getting closer to a finished Haier system
Very nice! Congratulations. Big MLC looks neat whe...
By bobflux , 5 hours ago
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RE: Solar Power Output – Let’s Compare Generation Figures
We have the same problem, 12 mature trees clip the morn...
By Papahuhu , 20 hours ago
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RE: Solis inverters S6-EH1P: pros and cons and battery options
I had a battery and inverter installed a while ago, my ...
By Batpred , 23 hours ago
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RE: Is This Initial Free Quote From Octopus Trusted Partner Reasonable?
@ltron2 The EPC on our house is A-92, however that i...
By Rob of York , 1 day ago
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RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage
One thing a spreadsheet based heat loss calculator can ...
By cathodeRay , 1 day ago
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RE: Heat pump branding. Clever, contemporary… or a bit too much?
The layout is confusing - much better like this: We b...
By downfield , 2 days ago
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RE: Is it just me, or does tradesperson timekeeping and communication drive you absolutely mad?
My experience, backed up by opinions from various frien...
By Majordennisbloodnok , 2 days ago
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RE: Analysis of the economics of switching to an A2W ASHP compared to other heat sources
I had a meeting today with a company based out of Swede...
By Mars , 3 days ago
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RE: Review your electricity provider
We were with Octopus in our old house and it was fault...
By ian33a , 3 days ago
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RE: Estimating true heat loss from twelve months of consumption data
I did, indeed, go with the 12 KW Vaillant unit.  ...
By ian33a , 3 days ago


