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
- 2,088 Topics
- 45.8 K Posts
- 32 Online
- 3,374 Members
Join Us!
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: DHW SET UP with Samsung gen 5
Have always liked many Williams bros. and still do ! I ...
By Alfapat , 6 hours ago
-
We’re excited to introduce Wattson, our brand-new AI as...
By Mars , 6 hours ago
-
How not to install a heat pump
My heat pump was due to be installed in January after I...
By sandvika , 7 hours ago
-
@bart Best of luck moving forward, I look forward to he...
By ASHP-BOBBA , 20 hours ago
-
RE: Renewables & Heat Pumps in the News
By Morgan , 20 hours ago
-
RE: Ecodan EMP2 kit - is it any good?
Please note: heat meter accuracy at 95+% is as long as ...
By ASHP-BOBBA , 1 day ago
-
RE: Air Changes per Hour - ACH and the MCS requirement
@jamespa I love going on the tools, I did it yesterday,...
By ASHP-BOBBA , 1 day ago
-
RE: Flow Rate & Low Loss Headers
Houses with reasonably low loss aren't going to require...
By JamesPa , 2 days ago
-
RE: Help me keep the faith with my air source heat pump installation
If it's running on WC then at night it's quite likely t...
By JamesPa , 2 days ago
-
RE: Jokes and fun posts about heat pumps and renewables
@majordennisbloodnok That’s OK as long as the ‘Terminol...
By Toodles , 3 days ago
-
RE: RDSAP10 effect on existing heat pump EPC rating?
@aaron All features were in place for the last several ...
By AF1 , 3 days ago
-
RE: To relocate or add extra PV panels..advice required
The situation you are currently experiencing is represe...
By apollogrid , 3 days ago
-
RE: I don't need any heating in the summer. How do I turn my Samsung heat pump off?
SmartThings indeed allows remote control over the heat ...
By HCas , 3 days ago
-
RE: Remaining hot water/hot water flow meter
@lakey Hi, I had a quick read through and wanted to see...
By ASHP-BOBBA , 3 days ago
-
RE: I worry I've messed my Samsung settings up somehow
@ecobaker I missed this, sorry So 3031 was set to...
By Joshua , 4 days ago
-
RE: Forum updates, announcements & issues
@old_scientist thank you, and thank you to @Morgan for ...
By Mars , 4 days ago
-
RE: Say hello and introduce yourself
I am a UK based product manager for an energy storage s...
By shawnlee , 4 days ago
-
RE: Thinking of ripping our my IVT Greenline HT Plus C model and replacing with a gas boiler.
That's great and in principle I wouldn't disagree, but ...
By JamesPa , 4 days ago