Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
ASHP Advice: High T...
 
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!

ASHP Advice: High Temperature vs. Low Temperature Heat Pump For Microbore

 
Page 2 / 2
Air Source Heat Pumps (ASHPs)
Last Post by Marzipan71 2 years ago
14 Posts
6 Users
4 Reactions
6,285 Views
RSS
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 6 years ago
Posts: 4425
26/04/2024 8:06 pm  

@jamespa

I fully agree with James that a HT heat pump will probably be no more costly to run than a LT heat pump when operating at the same LWT.

If the reason for installing a HT heat pump is because a LT heat pump would not be able to supply LWT at sufficiently high temperature to meet demand, then a HT heat pump is likely to be more expensive to run.

This is why improved insulation, larger heat emitters and other ways of lowering the required LWT should be the primary objective.

As I have stated repeatedly 'if you don't require the thermal energy in the first place, then it is not necessary to produce it'.



   
ReplyQuote
Marzipan71
 Marzipan71
(@marzipan71)
Estimable Member Member
Joined: 4 years ago
Posts: 120
29/04/2024 12:07 pm  

Hi - we have a Daikin 16kW HT ASHP installed which was the choice of our builder when we did our renovation. We heat around half the (300 sqm detached) house with 7 new aluminium radiators averaging 1.5kW each at T40, and half with wet UFH. The radiators have a mix of 10, 12, and 15mm copper piping which is connected to a Caleffi coplanar manifold which results in each radiator being on its own loop. Our LWT on the coldest days in winter is around 45C, and the house is a constant 21C in winter. The only time the system uses the HT functionality as far as I can see is the weekly legionnella cycle (to 60C). Total grid consumption for the year is around 11000 kWh with solar consumption adding around 5000 kWh. After four years of ownership, I think we probably could have gotten away with a LT system but we are happy with the HT system overall, skinny piping and all. 



   
👍
1
ReplyQuote
Page 2 / 2
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