@bobbt9866, that's a great tip. Very helpful.
Pre-order: The Ultimate Guide to Heat Pumps
Subscribe and follow our Homeowners’ Q&A heat pump podcast
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.
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.
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.
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.
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?
Wasn't aware we were disagreeing.
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?
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.
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.
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.
- 26 Forums
- 2,123 Topics
- 46.7 K Posts
- 19 Online
- 4,531 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: Is your heat pump insured?
My home insurance renewal is due soon meaning I am doin...
By cathodeRay , 4 hours ago
-
New Vaillant aroTherm Plus in black - When will it come to the UK?
It looks like Vaillant are updating the aroTherm plus l...
By Sandy , 6 hours ago
-
RE: Planning Permission May 2025
Fair enough. I have read the legislation and MCS020a ...
By JamesPa , 7 hours ago
-
RE: Share Your Experiences with Heat Pump Manufacturer Support
Ive called most of them over the years. By far the best...
By dgclimatecontrol , 7 hours ago
-
RE: How do I choose a single room MVHR to prevent losing heat in my bathroom ?
An update on the Heatsava. It is the most difficult thi...
By heat-pump-newbie , 11 hours ago
-
RE: Octopus Cosy & Octopus EV + bidirectional smart tariff, together. What, eh?
I've certainly seen that on their Ts & Cs page but ...
By Majordennisbloodnok , 1 day ago
-
RE: ASHP heat output monitoring
@carlo - not much better, is it. It looks more like a u...
By cathodeRay , 1 day ago
-
RE: Renewables & Heat Pumps in the News
this document extensively describes (in a non-blame, ne...
By Judith , 2 days ago
-
RE: Ecodan - Legionella Operation Time and Target Temperature
Once the white plastic cap is removed, my immersion loo...
By Old_Scientist , 2 days ago
-
RE: Replacing Refrigerant on Mitsubishi Heat Pump
@dgclimatecontrol I don't know, but they were not happy...
By DavidAlgarve , 2 days ago
-
RE: Why do we need pressurised systems?
A good question @toodles. My old open thermal store and...
By AllyFish , 3 days ago
-
RE: 300 Liter Tank - Do I have to heat it all?
Cross references for @martingale Background discussi...
By Transparent , 3 days ago
-
@ecobaker May I ask a question of you please. I too hav...
By Papahuhu , 3 days ago
-
It's unclear to me how the Smart Control project work b...
By Transparent , 4 days ago
-
RE: Have Consumers Been Lied to About the Efficiency of Heat Pumps Made in China?
@pavel, this isn't about discrediting Chinese products....
By Mars , 4 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
We had an excellent four months (11/3 to 15/7) generati...
By JulianC , 6 days ago
-
RE: Is this just haze or something more?
I think the present somewhat cooler hazy days show the ...
By Judith , 6 days ago
-
RE: My misgivings about installing ASHP and solar panels via the ECO4 scheme...
All noted and accepted and as I say I am sorry that you...
By JamesPa , 6 days ago
-
I think it is very much me that is sitting outside the ...
By Grantmethestrength , 6 days ago
Members Online
No online members at the moment