Ground source v air source

[davidroberts30]

Its not ground shrinkage that i was thinking was the main issue but the fact there is no heat source at the depth which the pipe is installed. Are we honestly supposed to believe a good summer will heat the ground that far down.
Also ideally wants to be in ground which is wet or holds water for good contact with the pipe. If its gravelly or sandy and free draining probs not worth the expense. Ultimately with a lot of the renewables is only the rhi payments which make it worthwhile. Once these run out what's your plan?

My brothers is in sandy soil and seems to work ok

 

[S J H]

Its not ground shrinkage that i was thinking was the main issue but the fact there is no heat source at the depth which the pipe is installed. Are we honestly supposed to believe a good summer will heat the ground that far down.
Also ideally wants to be in ground which is wet or holds water for good contact with the pipe. If its gravelly or sandy and free draining probs not worth the expense. Ultimately with a lot of the renewables is only the rhi payments which make it worthwhile. Once these run out what's your plan?

I wasn’t going to go on rhi, because ive always been against it, but they said I could claim back £10k over 7 years. So I went through to extra cost of about £1500, then on completion of the house, it was calculated at £4K over 7 years.

As soon as it’s up if it’s still causing the problem, I’ll take it out and put an outside oil boiler in it’s place.

 

[organicguy]

I still don't understand that when the outside air temperature is below freezing (when we most need the heat) how air source can get any heat at all?

 

[e3120]

I still don't understand that when the outside air temperature is below freezing (when we most need the heat) how air source can get any heat at all?

The physics of it makes it possible - the refrigerant that extracts the energy from the air is even colder at this point, so heat will travel into it. The trouble is that any moisture in the air condenses and then freezes and requires energy to get rid off. They lend themselves better to cold, dry climates.

 

[gmgmgm]

I still don't understand that when the outside air temperature is below freezing (when we most need the heat) how air source can get any heat at all?

You're probably thinking "freezing" is zero degrees? On the Celsius scale, true. But 0C is about +273 degrees (Kelvin scale) so it shows there's a lot more heat in there which can be pulled out using the right equipment.

On the OP topic, I have a GSHP, which technically is more efficient than ASHP. Since it was installed, ASHP prices have come down a very long way, to where they are cheaper than GSHP for maybe 99% of users.

 

[farmerclare]

My mother has just had air source heating fitted by the housing association after the ground source heating went wrong. She says there is some green/blue liquid on the slabs under the pump. Anyone any ideas what it could be ? She is worried about letting her dog out in the garden.

 

[davidroberts30]

Antifreeze/glycol

 

[davidroberts30]

DONT LET DOGS AT IT!

 

[farmerclare]

DONT LET DOGS AT IT!

Thanks
I told her to keep her dog away from it

 

[ollie989898]

I still don't understand that when the outside air temperature is below freezing (when we most need the heat) how air source can get any heat at all?

The refrigerant inside isn't water, which means it can draw heat out of the air at far lower temperatures and them dump it into your house. It only works because the outside air is infinitely vast, compared to the much much smaller volume of air inside your house, which of course should be insulated heavily to keep it warm.

What really bakes your noodle is how you can burn gas to refrigerate a cool box.

 

[sjt01]

The refrigerant inside isn't water, which means it can draw heat out of the air at far lower temperatures and them dump it into your house. It only works because the outside air is infinitely vast, compared to the much much smaller volume of air inside your house, which of course should be insulated heavily to keep it warm.

What really bakes your noodle is how you can burn gas to refrigerate a cool box.

But it needed Einstein to design it - he did when at the Swiss Patent Office