Soldato
Big house? Mine was a bit less than what MKW had but he put down a larger house footprint than mine.
Heat Pumps: anyone have one/thought about it?
- Thread starter fish
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Big house? Mine was a bit less than what MKW had but he put down a larger house footprint than mine.
Soldato
Not overly but I did guestimate square metre measurement based on similar house sold on the same street. Perhaps I've over estimated; wonder how I can get a accurate measurement outside of fudging it using a tape measure.
Soldato
You can search your epc cert on the gov website, that also has a sqm value of the property.
Soldato
I suspect they also have some weighting for area.
Even if they are using their own staff they will be paying London wages for London fitters
Even if they are using their own staff they will be paying London wages for London fitters
Soldato
Thank you. Useful site; I just searched and I'd over estimated by 10 sqm.
Associate
What sort of manufacturer warranties are coming with these heat pumps?
just catching up there - this moved quickly the last few days!
Can you get a 50kw combi that will deliver 25l/minute? Sure, but it will be grossly oversized for the property which may have a heating requirement as low as 6kw peak and hardly ever get into its condensing mode, constantly cycle and and needlessly chunder loads of gas.
un-vented = sealed loop
My radiator loop is vented, there is a little header tank in the loft that deals with the expansion and contraction of the water in the system as it heats/cools. It also has a little ball **** which automatically tops up the system as needed.
An unvented loop has a pressure vessel to handle the expansion and you need to fill it manually with a tap somewhere on the system to keep it pressurised.
Yes, absolutely yes, particularly when sized appropriately for the actual heating load of the house. That is the number one selling point of installing a un-vented cylinder is mains pressure hot water.
Can you get a 50kw combi that will deliver 25l/minute? Sure, but it will be grossly oversized for the property which may have a heating requirement as low as 6kw peak and hardly ever get into its condensing mode, constantly cycle and and needlessly chunder loads of gas.
Vented = not a sealed loop
un-vented = sealed loop
My radiator loop is vented, there is a little header tank in the loft that deals with the expansion and contraction of the water in the system as it heats/cools. It also has a little ball **** which automatically tops up the system as needed.
An unvented loop has a pressure vessel to handle the expansion and you need to fill it manually with a tap somewhere on the system to keep it pressurised.
Yes, all but two radiators need replacing, of the 10 or so that need doing 4 are already double panel and will need to grow in size. The others are single panel which need swapping for doubles.
It should include putting things back to the way they were but probably not re-decorating.
I doubt it, you'll have to apply to your supplier to get it done, whoever that is. Octopus are currently doing it for free.
do you mind if i am nosy and ask the square meterage you put in for the quote?
I used 132M2 per my EPC.
www.gov.uk
Find an energy certificate
Find a property's energy certificate including an energy performance certificate (EPC), display energy certificate (DEC) or air conditioning inspection certificate.
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thanks i was wondering on the limits of their system sizes
I think the heat loss of my house will only require a 6kw heat pump which is pretty small in heat pump world.
My existing boiler is only 14kw. It has has a big heat store to buffer out demand but its pretty small in the grand scheme of things.
My existing boiler is only 14kw. It has has a big heat store to buffer out demand but its pretty small in the grand scheme of things.
Soldato
Can only go off the Octopus quote as its all I have
- Your heat pump comes with a 5 year warranty and a 2 year warranty for other products installed (such as hot water cylinder and radiators). As well as a 5 year Workmanship and Labour Warranty.
Soldato
There are benefits to having smaller pipework, primarily in minimising heat loss through the pipes. The UK is plagued by overspecced heating systems.
Soldato
Agree with that. I had a boiler installed and was being quoted for 25kw system by several plumbers. I then got a really highly regarded heating engineer who specified a 19kw system and said even that was oversized. It has turned out to be perfect for our needs and has not left us wanting.
These systems are designed to tick over 24/7 at low modulation, even more so if your home is well insulated. Most plumbers err heavily on the side of caution when sizing.
These systems are designed to tick over 24/7 at low modulation, even more so if your home is well insulated. Most plumbers err heavily on the side of caution when sizing.
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They could lag them to basically eliminate it but asking a house builder to do a good job is not the done thing…
@SpeedFreak, that’s a polite was of putting it. What’s closer to reality is they don’t fully understand the ‘math’ behind it all and why oversizing is actually bad.
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Soldato
It depends how large your property is and how many bedrooms and bathrooms you have
Soldato
Octopus energy have quoted me £6100 after the £5000 grant, still seems very expensive.
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Soldato
For a air source heat pump?
Soldato
Just says a Daikin heat pump.