Heat pump size advice
So the Financial Director as given the green light to getting an heat pump a few months ago.
Got 3 quotes from Octopus, British Gas and Heatgeek.
Octopus: heatloss of 5.2 with installing a Daikin 6kW, design at 50c bedrooms and hallway 18c and dining and living room at 21c.
Heatgeek: heatloss of 5.3 but want to install a 7kW Valliant and stating in the survey the reason why a bigger heatpump "This is due to the latest cold snap has highlighted some issues with output figures. During frequent defrost cycles the units are looking to loose up to 30% output" design at 45c all rooms 20c.
British Gas: heatloss of 4.4 with installing a Daikin 4kW, design at 45c all rooms 21c.
If I had the money I would go with HG but it's 4x times more than Octopus.
I'm going with BG as they've price matched Octopus and will put in new pipework and repipe some plastic runs at no extra cost.
Spoke to BG surveyor(who did install heatpumps before downing tools) regarding the other surveys I gotten and he said 4kW will do the job even at -7.
After seeing multiple posts regarding DWH and in a cold snap the heating will be off for maybe 2hrs(210L cylinder) the 4kW will struggle to catch up and will be working at it's top end(which i assume isn't good for longevity)
So i'm i best asking for a 6kW Daikin instead of a 4kW?
sorry for the ramble, want to make sure i get this right as I don't want the financial Director getting cold in winter and asking to get a combi installed.
- 22 Forums
- 2,074 Topics
- 45.5 K Posts
- 97 Online
- 3,350 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: 5 Star Service from Havenwise
@sheriff-fatman Good post. I am also considering Hav...
By Morgan , 1 hour ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@editor Cobbler’s Mantra that!
By Toodles , 2 hours ago
-
RE: What’s the modern take on advised types of insulation?
Grant was my local MP before he lost his seat. He was ...
By Jeff , 17 hours ago
-
RE: Radiators downstairs are cooler at the bottom after ASHP install
@melonbuffet This is great assuming now the down stairs...
By ASHP-BOBBA , 20 hours ago
-
RE: Commencing on an ASHP Installation Process
@jamespa Thanks for your input into this thread so far....
By Sheriff Fatman , 20 hours ago
-
Pacific Blue reveals ageing Codrington Wind Farm decommissioning plans.
Australia Blue, the first wind farm in Western Victoria...
By Morgan , 21 hours ago
-
RE: Ripped Off: How UK Homeowners Are Paying Gas Prices for Wind Energy
The challenge is who pays, who holds the debt and the i...
By Jeff , 1 day ago
-
RE: Flow rate discrepancy between ASHP and manifold
That's useful thanks, I hadn't seen that table before. ...
By AshRolls , 2 days ago
-
In principle I agree, @johnmo, but with provisos. The...
By Majordennisbloodnok , 2 days ago
-
RE: Heat pump installation and BUS Grant timings
@jamespa Thats how I understood it too. 🙂
By ASHP-BOBBA , 2 days ago
-
RE: Antifreeze top up for my heat pump - is this a rip off?
@sallyl That sounds about right if they are re-filling ...
By Brendon Uys , 2 days ago
-
RE: Enabling WiFi: Samsung ASHP on Smart Things App
I would switch it off and see if anyone noticed. We use...
By Anonymous 5011 , 3 days ago
-
I wouldn't be so sure about that. Heat pump designers ...
By JamesPa , 3 days ago
-
RE: Jokes and fun posts about heat pumps and renewables
@toodles they're a rowdy bunch!
By Mars , 3 days ago
-
RE: Home energy storage & battery register
@jamespa To a certain extent, by exporting to the grid ...
By Toodles , 4 days ago
-
RE: Forum updates, announcements & issues
@editor Fairy Nuff Mars, I doubt that my ramblings woul...
By Toodles , 5 days ago
-
RE: Confusion about heat pump sizing
We’ve published a deep dive into heat pump sizing, and ...
By Mars , 5 days ago
-
We’ve published a deep dive into heat pump sizing, and ...
By Mars , 5 days ago
-
RE: Kensa GSHP finally installed - now to start the optimisation process
Just had a quick scan of the manual and should be weath...
By Anonymous 5011 , 6 days ago