Forums

Forums
Renewable Heating
Air Source Heat Pum...
Sizing of heat pump...
 
Notifications
Clear all

Sizing of heat pumps

 
Page 5 / 7
Air Source Heat Pumps (ASHPs)
Last Post by bobbt9866 4 years ago
75 Posts
13 Users
164 Reactions
12 K Views
RSS
Mars
 Mars
(@editor)
Illustrious Member Admin
26280 kWhs
Veteran
Joined: 4 years ago
Posts: 2986
Topic starter 16/03/2021 10:07 am  

@bobbt9866, that's a great tip. Very helpful.

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb

Subscribe and follow our Homeowners’ Q&A heat pump podcast


   
ReplyQuote
 bobbt9866
(@bobbt9866)
Estimable Member Member
0 kWhs
Expert
Joined: 4 years ago
Posts: 46
16/03/2021 10:36 am  

@editor

This is the video I mentioned.


   
👍
4
ReplyQuote
 Optimum Energy Solutions
(@optimum-energy-solutions)
Active Member Member
0 kWhs
Joined: 4 years ago
Posts: 5
25/03/2021 8:24 am  

A full heat loss calculation in accordance with latest version of MIS3005 and using a method that complies with BS EN 12831 with internal and external design temperatures in accordance with CIBSE guide must be employed. For anyone looking to receive incentives (RHI for example) this is not optional but mandatory and as part of the MCS handover it is a requirement that a full heat loss calc is given to the customer. 

Unfortunately this is rarely done and we know this from experience having carryied out site audits for an energy company in this sector as well as training hundreds of people as part of a Government funded programme now underway.


   
👍
2
ReplyQuote
 bobbt9866
(@bobbt9866)
Estimable Member Member
0 kWhs
Expert
Joined: 4 years ago
Posts: 46
25/03/2021 11:01 am  

@optimum-energy-solutions

Of course a full heat loss should be done, but we are also giving novices some idea on how to size a load before deciding whether they can afford to change their heating systems.

Giving the fiasco of Green Deal 1.0 & 2.0 and the reduction in funding generally, many may not go the MCS route. Hopefully they do!

The client should have a heat loss calc before going ahead and have it explained to them in simplistic terms with queries answered.


   
👍
2
ReplyQuote
 Optimum Energy Solutions
(@optimum-energy-solutions)
Active Member Member
0 kWhs
Joined: 4 years ago
Posts: 5
25/03/2021 12:02 pm  

Estimating a demand is pretty easy with an EPC if you're also a DEA and can read between the lines. In the scheme of things the size of the heat pump shouldn't make a huge difference to the price as there's just as much installation involved in fitting a small heat pump as a big one. However I wouldn't suggest a novice even contemplates sizing a system. 

As the incoming incentives post March 2022 will also require regulation probably aligned to the forthcoming updated MCS regs, I see no reason why any client would choose to follow a different route to benefit from what is after all free money albeit somewhat reduced next year.


   
ReplyQuote
 bobbt9866
(@bobbt9866)
Estimable Member Member
0 kWhs
Expert
Joined: 4 years ago
Posts: 46
25/03/2021 12:23 pm  

@optimum-energy-solutions

Missing the point really.

No one is suggesting that a heat load calc is not required but a rule of thumb method was suggested to assist novices, of which there are many.

If someone is trying to decide whether to change or just service their boiler it is good for them to have a guide to sizing before calling in a qualified engineer.


   
ReplyQuote



 Optimum Energy Solutions
(@optimum-energy-solutions)
Active Member Member
0 kWhs
Joined: 4 years ago
Posts: 5
25/03/2021 1:07 pm  

Sorry but we will have to agree to disagree - the system size is not directly related to price which I can only surmise is what you are eluding to?


   
ReplyQuote
 bobbt9866
(@bobbt9866)
Estimable Member Member
0 kWhs
Expert
Joined: 4 years ago
Posts: 46
25/03/2021 1:56 pm  

@optimum-energy-solutions

Wasn't aware we were disagreeing.


   
ReplyQuote
 Optimum Energy Solutions
(@optimum-energy-solutions)
Active Member Member
0 kWhs
Joined: 4 years ago
Posts: 5
25/03/2021 2:14 pm  

I must be missing the point as you say - I just cannot possibly see how the size of a system could in anyway help someone decide whether to change from a boiler to heat pump as you mentioned?


   
ReplyQuote
 bobbt9866
(@bobbt9866)
Estimable Member Member
0 kWhs
Expert
Joined: 4 years ago
Posts: 46
25/03/2021 2:21 pm  

@optimum-energy-solutions

It allows people to do some research before 'wasting' an engineers time. If they can get a ball park size and get indicative prices it could help make a decision as to whether they have the budget. 

If they can afford it, they then call in an engineer to do proper heat calculations and get advice as to what they can do to reduce the heat loss plus get a detailed quote.


   
ReplyQuote
 bobbt9866
(@bobbt9866)
Estimable Member Member
0 kWhs
Expert
Joined: 4 years ago
Posts: 46
25/03/2021 2:24 pm  

@optimum-energy-solutions

I would add that, if you rely on the media for your research, as many do, they would get a highly inflated idea on what a Heat Pump system costs, due to vested interests. They may even get frightened off making the change at all.


   
ReplyQuote
 Optimum Energy Solutions
(@optimum-energy-solutions)
Active Member Member
0 kWhs
Joined: 4 years ago
Posts: 5
25/03/2021 3:00 pm  

Sorry but I can't see how someone could possibly get an indicative price of a system simply by making a misinformed guess at the possible size of a heat pump? 

They would still have to refer to an installer/s who one hopes would do more than rely on a house holders guesstimate - it's just not appropriate and potentially very misleading.

The potential size of a system cannot give any indication at all of the potential cost. 


   
ReplyQuote



Page 5 / 7
Forum Jump:
  Previous Topic
Next Topic  
Share:

Join Us!

Heat Pump Dramas?

Thinking about installing a heat pump but unsure where to start? Already have one but it’s not performing as expected? Or are you locked in a frustrating dispute with an installer or manufacturer? We’re here to help.

✅ Pre-Installation Planning
✅ Post-Installation Troubleshooting
✅ Performance Optimisation
✅ Complaint Support (Manufacturer & Installer)

👉 Book a one-to-one consultation now.

Latest Posts

x Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
Shield Security →