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Air source heat pump feed back
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Mintyrbc said:I would research makes of heat pump, for £11k id be wanting a Dakin, Viessmann or Mitsibishi with a decent sized cylinder containing an inline buffer for that sort of money.
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shinytop said:googlefast said:Mintyrbc said:What system have you been quoted £11k for? I can tell you if they quote is a rip off.The quote is just for a basic installation of 10kw condenser, plus the cylinder and the bare minimum of what's needed to make it run. They aren't making any changes to the pipes, radiators, or anything really, just connecting the new system to the old radiators, their quotation does mention 4k for labour though.Here's what I've found out so far, apparently the company that manages the GHG scheme is rejecting some quotes and saying that they're not realistic, that's what I heard from one company. It's a shame really because the idea behind scheme is great, but the implementation of it and being able to only work with a few hand picked companies just makes it not fit for purpose.
I had a feeling that I was being ripped off! Are you going ahead with the installation?
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Don't even think about just hanging it off the existing plumbing and radiators unless you get some guarantees regarding heating and efficiency performance. Anyone who is just offering to replace a boiler with a heatpump without doing a proper system evaluation should be avoided at all costs
Rads for gas or oil systems are usually sized for a flow temps or around 60-70 degrees and heatpumps just don't perform well at anything above 50 (ideally you want it down to around 40 to avoid compromising efficiency) so your rads, and possibly some of the plumbing, needs to be sized to perform at lower flow temperatures - that means rads at least 50% larger than the ones you've got.
Trying to run a system at high flow temps will cost you a lot of money, especially if you crank it up so the backup/boost heating has to be activated. This is one of the biggest causes of dissatifsaction with ASHP. You'll be both cold and skint.Never under estimate the power of stupid people in large numbers0 -
googlefast said:Mintyrbc said:I would research makes of heat pump, for £11k id be wanting a Dakin, Viessmann or Mitsibishi with a decent sized cylinder containing an inline buffer for that sort of money.
It's a point people don't realise, you need space for all the kit. I was lucky, mine is in what was an old outdoor toilet, I tiled and insulated it and ran electric to it and turned it into a tiny plant room. I could never have that in my house, it would take up way too much space.0 -
googlefast said:shinytop said:googlefast said:Mintyrbc said:What system have you been quoted £11k for? I can tell you if they quote is a rip off.The quote is just for a basic installation of 10kw condenser, plus the cylinder and the bare minimum of what's needed to make it run. They aren't making any changes to the pipes, radiators, or anything really, just connecting the new system to the old radiators, their quotation does mention 4k for labour though.Here's what I've found out so far, apparently the company that manages the GHG scheme is rejecting some quotes and saying that they're not realistic, that's what I heard from one company. It's a shame really because the idea behind scheme is great, but the implementation of it and being able to only work with a few hand picked companies just makes it not fit for purpose.
I had a feeling that I was being ripped off! Are you going ahead with the installation?
I'm not using the Green Homes grant though; I have a suspicion prices are inflated by suppliers when you do. If you want any more details of my quote PM me.0
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