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.
- 26 Forums
- 2,199 Topics
- 48.4 K Posts
- 72 Online
- 5,854 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: Solar Power Output – Let’s Compare Generation Figures
Further, these bar charts may throw a few more lumens o...
By Toodles , 17 minutes ago
-
RE: Why Air Release Valves and Deaerators are Non-Negotiable
Top tip to fit an isolation valve! All good points. I...
By Old_Scientist , 7 hours ago
-
RE: Heat Pump Installers: Competence, Illusion and the Hard Truth Homeowners Must Face
@editor I hope you have at least a partially working he...
By GrahamF , 7 hours ago
-
@drei are taking measurements from the heat pump, or do...
By GrahamF , 10 hours ago
-
RE: Heat pump and wifi kit connection.
Wi-Fi kit covers any Samsung device that has a modem in...
By Alfapat , 18 hours ago
-
RE: How to Understand Wiring Up a Heat Pump
I’m watched @pirate-rich rewire our wiring centre last ...
By Mars , 19 hours ago
-
RE: Sizing - Save me from my headache
If you get an R290 pump you should be able to heat the ...
By JamesPa , 19 hours ago
-
RE: Help me keep the faith with my air source heat pump installation
@jamespa can you take a pic of the primaries inside the...
By AdamK , 20 hours ago
-
RE: Large heat pump options for church building
@aventus-eco Thanks Sean, will drop you a line.
By Josephiah , 20 hours ago
-
RE: Moving FIT array onto a Tesla Powerwall 3 possible?
@toodles that’s good news for @adamk
By Judith , 20 hours ago
-
RE: Samsung Gen 6 - Schedules not working
@technogeek That sounds very logical :-). I will give i...
By bontwoody , 24 hours ago
-
RE: Who's your electricity provider and what's your tariff?
Considering Octopus states all their electricity is gre...
By AgentGeorge , 1 day ago
-
RE: Heat Pump + Tado Setup: Smarter Control for Secondary Pumps?
@pirate-rich thanks for the reply. If I were to explo...
By Lloydi , 1 day ago
-
RE: Seal the Deal: Don't Let Your Heat Pump Leak Energy
@transparent I think the committee might get into some ...
By Toodles , 1 day ago
-
Samsung ASHP Support in Midlands area?
Hi all, Per title.... can anyone recommend a ASHP ser...
By Andehh , 1 day ago
-
May I present the maths I referred to earlier when disc...
By Transparent , 1 day ago
-
RE: RDSAP10 effect on existing heat pump EPC rating?
How many times and dates have epc sap rules been change...
By Tim441 , 1 day ago