Last seen: Jan 6, 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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RE: Underfloor Heating Installation Issues with Heat Pump
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Issue with a Grant Air Source Heat Pump & Tado Smart Thermostat
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RE: Testing new controls/monitoring for Midea Clone ASHP
Now seems a good time to summarise the costs and effici...
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RE: Peak Energy Products V therm 16kW unit heat pump not reaching flow temperature
ASHPs do have a minimum compressor speed. The minimum h...
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RE: Electricity price predictions
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RE: Jokes and fun posts about heat pumps and renewables
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What matters for flow and pressure drop is internal dia...
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RE: Do Fridges and Freezers have COP ratings?
@editor Thank you all for your replies and submitted in...
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I know and yes. The secondary deltaT wont necessaril...
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RE: Designing heating system with air to water heat pump in France, near Lyon
Just love the way you put it! 🤣
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O-oh! Let's take this as an opportunity to 'pass the ...
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