Search with Wattson

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!

Govt petition for review of EPC calculations to assist ASHP/GSHP

Government Schemes, Regulations, Training, Planning & Organisations

Last Post by Alec Morrow 4 years ago

4 Posts

3 Users

2 Reactions

3,159 Views

RSS

Sapper117

(@sapper117)

Trusted Member Member

Joined: 5 years ago

Posts: 49

Topic starter 30/01/2022 4:18 pm [#300]

Does anyone know if a petition has been raised on the govt sire for this? If sh where is it? If not is anyone interested in assisting I need 5 people and email addresses to start one. It is important that if the Govt want to increase the number of heat pumps installed then they need to ensure that the british regs are adjusted to allow for the unique way that heat pumps work, at present i am loosing points and just sitting below a c rating because I don't want TRVs on my system and simply to run it on weather compensation big black mark on my EPC!!

Quote

Alec Morrow

(@alec-morrow)

Reputable Member Contributor

Joined: 4 years ago

Posts: 216

30/01/2022 9:10 pm

i’ll join you.

Heat pumps aren’t special, they are just another heat source for a heating system

boiler manufacturers use the same compensation controller on boilers as heat pumps or both

Professional installer

ReplyQuote

Derek M

(@derek-m)

Illustrious Member Member

Joined: 5 years ago

Posts: 4425

30/01/2022 9:49 pm

Posted by: @alec-morrow

i’ll join you.

Heat pumps aren’t special, they are just another heat source for a heating system

boiler manufacturers use the same compensation controller on boilers as heat pumps or both

Hi Alec,

I'm afraid that I have to disagree. Because ASHP's in particular obtain 2/3 or more of their energy source from the outside air, their efficiency is severely affected when the outside air temperature is low. Basically the calorific value of the energy source is reduced at precisely the time when they need to work harder. It is therefore much more important for a heat pump to be correctly configured than any other boiler type.

👍

ReplyQuote

Alec Morrow

(@alec-morrow)

Reputable Member Contributor

Joined: 4 years ago

Posts: 216

30/01/2022 10:15 pm

@derek-m that doesn’t change the control strategy to put a heating system in a stable state (room temp)

The heat pump performance will be set and unalterable to accommodate the change in climatic conditions. All you can change is effectively a demanded temperature from the controller.

The system controls need to be adjusted to accommodate the building and other variables such as embitter type. These variables don’t change according to heat source.

Condensing boilers increase efficiency with lower flow temperatures, but the heating system demands the same temperature what ever the heat generator there are even electric resistant heating boilers which vary flow temperature with no efficiency gain, but because the building is held at a fixed temperature there is a saving in electricity usage, albeit probably not much

Professional installer

ReplyQuote