Household heat pumps.

Lancpudn · 19th October 2021, 08:30

Get your £5K government grant & start saving for your heat pump before the governments gas boiler tax kicks in due to the 'Net Zero Carbon Emissions' policy. It will put around an extra £170/annum on the already expensive gas bill.

https://www.bbc.co.uk/news/business-58959045
https://www.thenational.scot/news/natio ... ent-plans/

KWIL · 19th October 2021, 09:10

"They" do not mentiion that the heat output of heat pumps is low grade (lower temp than a boiler). ie you need extra sized radiators to get the desired amount of heat into the room, preferably under floor heataing which runs at a lower temperature and probably larger pipes to move more water at the lower temperature....

macafee2 · 19th October 2021, 09:22

Quote:

Originally Posted by KWIL

"They" do not mentiion that the heat output of heat pumps is low grade (lower temp than a boiler). ie you need extra sized radiators to get the desired amount of heat into the room, preferably under floor heataing which runs at a lower temperature and probably larger pipes to move more water at the lower temperature....

would a larger heat pump produce hotter water?

macafee2

roverbarmy · 19th October 2021, 09:29

My cousin had these in the USA. It was some time ago but I wasn't impressed. The heating was more like background heating and had to be supplemented when the weather was really cold. Having a bath emptied the hot water and it could take all day to replenish! It seemed like a lot of effort and expense at the time and it didn't really match up to the norm. Things may have improved a lot since then but that remains to be seen!

another_clean_sheet · 19th October 2021, 10:08

Quote:

Originally Posted by macafee2

would a larger heat pump produce hotter water?

macafee2

No. It is just like a small and large gas boiler which will produce more hot water but at the same temperature.

KWIL · 19th October 2021, 11:18

And of course as it gets colder, the airsource heat pump get less efficient and you may need heat backup from another source.

Ground source would be better BUT big deep hole required OR a large area for the pick up piping

Outdoor Temperature Capacity (Btu/hr) COPh
47°F (8.3°C) 51,000 3.86
35°F (1.7°C) 43,400 3.31
17°F (-8.3°C) 33,900 2.33

Lovel · 19th October 2021, 16:45

When I look at these installations and the pump unit itself all I see is components made by hydrocarbon and rare earth minerals how is that carbon free? Use of refrigerant too. Emperors new clothes me thinks.

Kroll · 19th October 2021, 17:15

I wouldn’t get your hopes up. There’s only funding for 90’000 households out of 20 million households.

macafee2 · 19th October 2021, 18:13

Quote:

Originally Posted by Kroll

I wouldn’t get your hopes up. There’s only funding for 90’000 households out of 20 million households.

I heard that too but how on earth did whom ever work out it would only help 90,000 homes?

macafee2

MSS · 19th October 2021, 18:59

Before we get too excited about the emissions associated with manufacturing heat pumps, please note the following:

'Homeowners will be encouraged to switch to a heat pump or other low-carbon technology when their current boiler needs replacing'

What they are saying is that it make sense to replace a gas boiler with a heat pump or another low-carbon technology when it is time to renew the former anyway.

In general, a lot of houses are not well insulated and at the same time people have become accustomed to higher than necessary temperatures. Addressing these two areas and then fitting a heat pump or similar at boiler replacement time may be a good way forward in reducing energy consumption and emissions.

19th October 2021, 08:30	#1
Lancpudn This is my second home MG ZS EV Join Date: Oct 2015 Location: Lancashire Posts: 15,580 Thanks: 4,591 Thanked 3,427 Times in 2,565 Posts	Household heat pumps. Get your £5K government grant & start saving for your heat pump before the governments gas boiler tax kicks in due to the 'Net Zero Carbon Emissions' policy. It will put around an extra £170/annum on the already expensive gas bill. https://www.bbc.co.uk/news/business-58959045 https://www.thenational.scot/news/natio ... ent-plans/ __________________ Blessed are the tea makers. http://www.dailymotion.com/video/x3b...auto-2000_auto

19th October 2021, 09:29	#4
roverbarmy This is my second home Roverless + 1.7D Sportage Join Date: Aug 2014 Location: East Norfolk Posts: 7,050 Thanks: 729 Thanked 2,021 Times in 1,449 Posts	My cousin had these in the USA. It was some time ago but I wasn't impressed. The heating was more like background heating and had to be supplemented when the weather was really cold. Having a bath emptied the hot water and it could take all day to replenish! It seemed like a lot of effort and expense at the time and it didn't really match up to the norm. Things may have improved a lot since then but that remains to be seen! __________________ Oil in my veins!

19th October 2021, 11:18	#6
KWIL Precise Rover 75 Tourer 2.5KV6 Connoisseur SE Join Date: Mar 2013 Location: Fleet Posts: 2,954 Thanks: 630 Thanked 617 Times in 480 Posts	And of course as it gets colder, the airsource heat pump get less efficient and you may need heat backup from another source. Ground source would be better BUT big deep hole required OR a large area for the pick up piping Outdoor Temperature Capacity (Btu/hr) COPh 47°F (8.3°C) 51,000 3.86 35°F (1.7°C) 43,400 3.31 17°F (-8.3°C) 33,900 2.33 Last edited by KWIL; 19th October 2021 at 11:21..

19th October 2021, 09:10	#2
KWIL Precise Rover 75 Tourer 2.5KV6 Connoisseur SE Join Date: Mar 2013 Location: Fleet Posts: 2,954 Thanks: 630 Thanked 617 Times in 480 Posts	"They" do not mentiion that the heat output of heat pumps is low grade (lower temp than a boiler). ie you need extra sized radiators to get the desired amount of heat into the room, preferably under floor heataing which runs at a lower temperature and probably larger pipes to move more water at the lower temperature....

19th October 2021, 16:45	#7
Lovel I really should get out more....... P6B, L550, Imp, F56, Commando Join Date: Nov 2006 Location: Aberdeenshire Posts: 2,886 Thanks: 352 Thanked 677 Times in 440 Posts	When I look at these installations and the pump unit itself all I see is components made by hydrocarbon and rare earth minerals how is that carbon free? Use of refrigerant too. Emperors new clothes me thinks.

19th October 2021, 17:15	#8
Kroll Regular poster ZT 160 Join Date: Sep 2021 Location: West Wales Posts: 80 Thanks: 33 Thanked 15 Times in 12 Posts	I wouldn’t get your hopes up. There’s only funding for 90’000 households out of 20 million households.

19th October 2021, 18:59	#10
MSS This is my second home Rover 75CDT, Jaguar XF-S 3.0V6, V'xhall Omega V6 Estate, Twintop 1.8VVT, Astra Estate and Corsa 1.2 Join Date: Dec 2007 Location: Suffolk Posts: 7,085 Thanks: 283 Thanked 624 Times in 440 Posts	Before we get too excited about the emissions associated with manufacturing heat pumps, please note the following: 'Homeowners will be encouraged to switch to a heat pump or other low-carbon technology when their current boiler needs replacing' What they are saying is that it make sense to replace a gas boiler with a heat pump or another low-carbon technology when it is time to renew the former anyway. In general, a lot of houses are not well insulated and at the same time people have become accustomed to higher than necessary temperatures. Addressing these two areas and then fitting a heat pump or similar at boiler replacement time may be a good way forward in reducing energy consumption and emissions.