Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
Heat pump size advi...
 
Notifications
Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Heat pump size advice

 
Air Source Heat Pumps (ASHPs)
Last Post by Silverkop 1 year ago
1 Posts
1 Users
0 Reactions
1,175 Views
RSS
 Silverkop
(@silverkop)
New Member Member
Joined: 1 year ago
Posts: 2
Topic starter 07/02/2025 11:12 am   [#2086]

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.



   
Quote
Forum Jump:
  Previous Topic
Next Topic  
Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

Click to access the login or register cheese
Protected By
Shield Security PRO