Peering over the ASHP cliff
@grahamb that all seems quite reasonable then for the 9kW quote. My pipe run for my monobloc is about 10m there, 10m back. The manual does allow longer pipe runs with careful design, but generally if you're having a long pipe run you'll want a split system which is when the refrigerant is pumped inside and heats water once inside the house in a box on the wall. They require a bit more space inside, but less outside, and they also need to be installed by an F Gas safe engineer so I think they're getting less popular.
I got hit with additional fees of about £1k for long cable and pipe runs. I suggest if they haven't taken that into account and they want to add a cost on that you think about hiring a third party electrician.
That 19,309kWh will be delivered heat, not electricity, so that's the part that would end up being roughly the same as your gas bill. I wouldn't worry if it's much higher or lower, just assume it'll be similar. They'll have probably estimated electricity usage to be between 5,000 and 6,000kWh for the heat pump.
Posted by: @oswiuThat 19,309kWh will be delivered heat, not electricity, so that's the part that would end up being roughly the same as your gas bill. I wouldn't worry if it's much higher or lower, just assume it'll be similar. They'll have probably estimated electricity usage to be between 5,000 and 6,000kWh for the heat pump.
Wow! Using your lower figure, that's going to ADD around £400 to my energy bill, using the higher number, that's £853 and that's totally ignoring the gas cooker.
@grahamb yes but you use less gas than that. Take your gas usage in kWh and divide it by 3 or 4 to get your heat pump usage. I think a gas hob normally accounts for only about 1 or 2% of your gas usage so you can basically ignore it
@grahamb I was saying they may have estimated that from guessing your heating/hot water needs at 19000kWh. If your needs are lower than that, which it seems like they are, then you won't use that much.
They may have given you an estimated 'efficiency' across the year called SCOP or COP or SPF which you can divide your actual gas usage by to get estimate electricity usage. It'll probably be between 3 and 4. The lower the flow temp is (and the bigger your radiators), the bigger this number will be.
When you say they included an 18L vessel in your quote, you should ask them if that's an in-line volumiser or buffer. If it's a buffer you should ask why you need it since they can sometimes be useful but also lower efficiency.
- 22 Forums
- 2,096 Topics
- 46.2 K Posts
- 55 Online
- 3,383 Members
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 I can and do keep 12 of the 21 panels clean wit...
By Toodles , 29 minutes ago
-
RE: Mitsubishi cycling while on chilled water output
I absolutely wouldn't remove the buffer altogether, I'd...
By JamesPa , 2 hours ago
-
RE: Commencing on an ASHP Installation Process
I received confirmation this morning that my Greener Ho...
By Sheriff Fatman , 4 hours ago
-
@jamespa Thanks for the advice - very helpful. I had al...
By abam48 , 1 day ago
-
RE: Weather compensated secondary circuits with Biomass
Hi @andycoo we do an LK 110 standalone weather compensa...
By Sune , 1 day ago
-
RE: Adding battery storage to SolarEdge PV system
@chandykris No need to apologise at all! I forgot to ad...
By Toodles , 2 days ago
-
RE: Say hello and introduce yourself
Yes please do Suggesting a loss in the region...
By JamesPa , 2 days ago
-
RE: Surface mount or bury primaries for heat pump installation?
Can we have some links to those you're considering plea...
By Transparent , 2 days ago
-
As I have reported elsewhere we turned on the cooling o...
By downfield , 3 days ago
-
-
@el3b Hi, sorry to hear that, it is advisable to instal...
By ASHP-BOBBA , 4 days ago
-
RE: Difficult positioning of air source heat pump
@rikiarn Out of intrigue, the thread reads as though Ai...
By Sheriff Fatman , 4 days ago
-
RE: Mitsubishi Ecodan Fails to Heat Water despite temperature drop
@m1kegibson If you are able to access the service me...
By HarriUp , 4 days ago
-
RE: When will heat pumps and install prices come down?
... which of course is impossible because the world mov...
By JamesPa , 4 days ago