Forums

Search with Wattson
Forums
Renewable Heating
Air Source Heat Pum...
6 Red Flags to Avoi...
 
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!

6 Red Flags to Avoid When Considering a Heat Pump Installation

 
Page 4 / 4
Air Source Heat Pumps (ASHPs)
Last Post by Alfapat 1 year ago
41 Posts
14 Users
31 Reactions
6,721 Views
RSS
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4550
30/11/2024 10:46 am  

@jamespa it is a good idea, but not easy as you say. We actually have something along these lines scheduled in for recording next week Friday for the podcast.


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
ReplyQuote
 Clover Rayner
(@Clover Rayner)
Joined: 1 year ago
Posts: 1
30/11/2024 1:02 pm  

This article highlights important factors to consider when installing a heat pump. Identifying red flags, such as poor sizing, improper installation, and lack of maintenance plans, ensures you avoid costly mistakes and achieve optimal system performance.



   
ReplyQuote
 Mike@MH
(@nogotony)
New Member Member
Joined: 2 years ago
Posts: 2
30/11/2024 5:41 pm  

Posted by: @gt22
↑

If I had a new ASHP installed I would still have to have a hot water cylinder. I watched the relevant video on this site. But I don't need any buffer unit. 

Can I get clarification on this point. 

Can the ASHP External unit, supply heat for Central Heating radiators or UFH at one temperature and one set of F&R pipes and do that supply directly? Bypassing the cylinder?

Or have I got that completely wrong and need to go away and do some serious reading? 🤔 

 



   
ReplyQuote



JamesPa
 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 4800
30/11/2024 7:15 pm  

Posted by: @nogotony
↑

Posted by: @gt22
↑

If I had a new ASHP installed I would still have to have a hot water cylinder. I watched the relevant video on this site. But I don't need any buffer unit. 

Can I get clarification on this point. 

Can the ASHP External unit, supply heat for Central Heating radiators or UFH at one temperature and one set of F&R pipes and do that supply directly? Bypassing the cylinder?

Or have I got that completely wrong and need to go away and do some serious reading? 🤔 

 

The ASHP, just like a boiler, can supply water at only one temperature at any time.  So it switches between space heating and DHW.  There will be one set of F&R from the heat pump, which splits into two sets at a diverter valve. 

The reason that boilers (as we set them up in the UK) can do both simultaneously is that they run the heating at a high flow temperature, resulting in both reduced comfort and a 10% increase in energy consumption and therefore cost.  Boilers, like heat pumps, are actually best run at a low temperature with weather compensation (best both for comfort and cost!), but in the UK we rarely do this, unlike some more enlightened countries in mainland Europe.

 


4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
👍
1
ReplyQuote
 Alfapat
(@alfapat)
Estimable Member Member
Joined: 3 years ago
Posts: 187
19/01/2025 3:36 pm  

Read your Red Flags with interest. Presently tweaking my system and getting the flow temperatures down as for the past 8 yrs It has been set at 50c
Currently adjusted lockshield valves to balance the Rads and brought the flow temps down to 44c without realising musch difference . I notice you suggest 38c which is quite low to what I have had it set but willing to try.

Can I ask what flow speed can my system run at , I notice there is a graduated glass viewing setting.

I also have a buffer tank in the system which I have only discovered from this forum may not be needed . However its there and reluctant to change , due to cost.



   
👍
1
ReplyQuote
Page 4 / 4
Forum Jump:
  Previous Topic
Next Topic  
Related Topics
Topic Tags:  buffer tank (2) , heat pump installation (2) ,

Currently viewing this topic 1 guest.



Share:

Join Us!

Worth Watching

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security PRO
This Site Is Protected By
Shield Security PRO →