Households in England and Wales to be offered new £5,000 Government grant from April 2022

Verdigris

Also "the engineer at the pump manufacturer I spoke to. Very well known and respected brand in the industry", is spelled "my mate down the pub".

Always a spurious, unnamed source, when disinformation trolls post.

Reed_Richards

Verdigris said:

ginger_chocolate said:

Does anyone know how disruptive the installation process is? My interest has been peaked by this scheme, but one thing that bothers me is the thought that it might involve tearing up half my house in the process.

Also whether the utility bills will go up and, if so, by how much.

How long is a piece of string? It depends on many factors.

The least disruptive case would be the main ASHP being sited outside, a smaller inside unit might go where the original boiler was sited, hot water cylinder replacement and some/all radiators changed for larger ones, to compensate for lower water temperatures.

My system has no inside unit, just an ASHP outside and (in the airing cupboard) a hot water cylinder with an integrated buffer tank underneath.  Almost all of my radiators were changed and I had to add two new ones.    

QrizB

Reed_Richards said:

My system has no inside unit, just an ASHP outside and (in the airing cupboard) a hot water cylinder with an integrated buffer tank underneath.  Almost all of my radiators were changed and I had to add two new ones.    

A monobloc? Seems a pretty good solution, no refrigerant piping to run.

https://www.hvpmag.co.uk/Detailing-the-differences-between-split-and-monobloc-heat-pumps/11935

Verdigris

Are there any efficiency deficits with monoblocs? Surely they'd all be monobloc if the SCOPs were the same?

[Deleted User]

Would I be correct in thinking that Heat Pumps use considerable electricity for pumping the warm (ish) water through the pipes and

also heat pumps do not produce HOT water for showering/ bathing / washing up etc  ?

So my electric bills would rocket anyway ?

QrizB

Deleted_User said:

Would I be correct in thinking that Heat Pumps use considerable electricity for pumping the warm (ish) water through the pipes ...

Depending on the system they might have three circulating pumps rather than the one that a standard wet heating system would have. They tent to be 50 watts each so two extra pumps would add 100 watts.

Deleted_User said:

also heat pumps do not produce HOT water for showering/ bathing / washing up etc  ?

No, that's not correct, most heat pump heating systems will heat a HW tank much like a conventional boiler does.

Sea_Shell

I suppose it depends on your definition of HOT water 🤣😉🤣😉

[Deleted User]

QrizB said:

Deleted_User said:

Would I be correct in thinking that Heat Pumps use considerable electricity for pumping the warm (ish) water through the pipes ...

Depending on the system they might have three circulating pumps rather than the one that a standard wet heating system would have. They tent to be 50 watts each so two extra pumps would add 100 watts.

Deleted_User said:

also heat pumps do not produce HOT water for showering/ bathing / washing up etc  ?

No, that's not correct, most heat pump heating systems will heat a HW tank much like a conventional boiler does.

Exactly how hot does water get then? 

QrizB

Deleted_User said:

QrizB said:

Deleted_User said:

Would I be correct in thinking that Heat Pumps use considerable electricity for pumping the warm (ish) water through the pipes ...

Depending on the system they might have three circulating pumps rather than the one that a standard wet heating system would have. They tent to be 50 watts each so two extra pumps would add 100 watts.

Deleted_User said:

also heat pumps do not produce HOT water for showering/ bathing / washing up etc  ?

No, that's not correct, most heat pump heating systems will heat a HW tank much like a conventional boiler does.

Exactly how hot does water get then? 

60C, if you want it that hot, but some people don't. I'm running my tank closer to 50C to aid the efficiency of my condensing gas boiler.

Here's a thread from 2005:
https://forums.moneysavingexpert.com/discussion/95200/domestic-hot-water-temperature

Reed_Richards

Deleted_User said:

Would I be correct in thinking that Heat Pumps use considerable electricity for pumping the warm (ish) water through the pipes and

also heat pumps do not produce HOT water for showering/ bathing / washing up etc  ?

So my electric bills would rocket anyway ?

Heat pumps use considerable electricity but the amount used by the pumps is negligible compared to the amount used for heating.  My system has two pumps, one inside the outdoor unit and a second one for the central heating which is inside the airing cupboard with the hot water cylinder.  But the amount used for heating should be about one third of the amount that would be used by direct electrical heating, averaged over the year.  So if you already use electricity for heating then your electricity bills would plummet rather than rocket.

My heat pump provides me with a 300 litre cylinder of hot water heated to 50 C.  It is rated to do this at a cost of 1/2.85 of the cost of heating the cylinder with an immersion heater.  50 C is plenty hot enough although I think I can go up to 55 C with the heat pump alone.  

I do have a monobloc system, by the way (@QrizB asked earlier).