Heat pump

[DeltaT]

I pity anyone that has just a ASHP this last winter, -14*C some days here in Scotland, it must of cost a fortune in leccy!!!.................

These ex-used car salesmen have a lot to answer for!!

 

[stunlawless]

Morning all,

I've got a georgian 4 bed detached. Scope for insulation of walls & floors is, well, limited. Got decent windows & loft insulation.

I got a GSHP (Dimplex 14kw) put in last summer, with optimised hydronic system (ie bigger rads)

House is always toasty (new baby born the day the install was completed, so wife & son at home living in a tropical paradise now).

Was paying £220 each month for LPG

Electric bill now increased by £40/mo

That's what I call a result

ps Letter from LPG supplier arrived today, advising "temporary surcharge" of 4.5p/litre...feeling even more smug now.

David

 

[motco]

There's clearly a few people on here who know a fair amount about ground source heat pumps (and air source) and the received wisdom seems to be that retro-fitting GSHP to an existing property is only possible if you can either install underfloor heating using water, or larger radiators (double area) also using water. In the sixties and seventies lots of new houses were fitted with warm air heating systems. It occurred to me that a heat pump condenser-to-air heat exchanger rather than to water, and warm air distribution throughout the house might also work. Obviously retro-fitting warm air is difficult (as is heat recovery ventilation) due to the size of the air ducts, but in a bungalow it should be much more practical even than either doubled up rads or underfloor systems. What is the view of the DiY massive on this?

 

[Temprise]

I pity anyone that has just a ASHP this last winter, -14*C some days here in Scotland, it must of cost a fortune in leccy!!!.................

These ex-used car salesmen have a lot to answer for!!

ASHP's cost more to run in the winter because of the lower air temp.

At the time of year you need it it costs you a fortune to run. The colder the outside temperature and the warmer the temp you want from it the more expensive it becomes.

Regards.

 

[Corgigrouch]

Or another way of looking at it..... Fit minisplits (Heat pumps) to your home and use them for the majority of your heating through the year and use your existing oil to heat your water and to back up the airsource when it gets very cold..... I always oversize my minisplits to allow for the fact that output reduces as temps drop.... Look at Toshiba, Sanyo, Fujitsu or Daikin rather than the garbage sold by Worcester