New ASHP installed and just had its first test

dullnote

HI new Danfoss heat pump install, first real frost and I an very pleases with the system.

House warm and running cost compared with LPG very low, should save in the region of £1k a year and the house is warm all the time.

This type of heating is fantastic. House is 190m2 under flooring heating throughout, cost estimated at £780/year.

Used to pay £2k a year for LPG , hope to use less than £1k

Dull note

[Deleted User]

Sounds fantastic, will be a big relief to get shot of the LPG ripoff.

Cheers

TiredGeek

Pictures, we want PICTURES

dullnote

Hi Photos I hope

https://dl.dropbox.com/u/60057399/Picture%20169.jpg

https://dl.dropbox.com/u/60057399/Picture%20168.jpg

if the link is not working please let me know and I will try something else.

The indoor unit looks as if there is going on but remember this was a retro fit and the existing gas boiler is still attached to the system.

Out door unit look to me as industrial washing machine.

any question regarding the set up please ask and I will try my best to answer

Dullnote

TiredGeek

That looks like a nice neat instalation

I like the outdoor unit, a bit more space age than the usual "1980's air con unit" look most of them have, I see what you mean about the washing machine though, must look really funny to people driving past!

Keep us informed how it copes with the winter.... always good to know how different systems work in the cold.

Leif

I am curious about this system. From the descriptions I have seen, it draws in air, and extracts the heat from the air for use in the house. So presumably you are producing lots of waste cold air. Where does that go? And is there a lot of it?

lovesgshp

The waste cold air just goes back into the outside air.

TiredGeek

Sucks the air in one side, takes the heat out of it and blows the cold air out the other side.
The heat is then transfered into the house via a unit that blows warm air around (air to air) or transfered into water and pumped around radiators or under floor (air to water).
The units I have can still harvest heat from air as cold as -20'c

Leif

Geotherm wrote: »

The waste cold air just goes back into the outside air.

Is that a problem? I imagine large amounts of cold air descending onto a neighbour's house might not be welcome, or is the amount insignificant?

lovesgshp

Leif wrote: »

Is that a problem? I imagine large amounts of cold air descending onto a neighbour's house might not be welcome, or is the amount insignificant?

They would not even realise

Cardew

Leif wrote: »

Is that a problem? I imagine large amounts of cold air descending onto a neighbour's house might not be welcome, or is the amount insignificant?

The best way to look at it is as a 'reverse fridge'.

With a fridge, or air conditioning, it extracts the heat from the interior of the fridge(or house with Aircon) and blows out that heat out as warm air.

The First law of Thermodynamics applies here, - you cannot create or destroy energy. Any heat extracted from the outside air is eventually released. So if you extract, xxxBTu(or kWh) from outside, your house loses exactly that amount of energy.