Heat pump quote

[samohtom]

Hi. I've recently moved into a ground floor flat in Cambridge, and am considering an air to water heat pump as a heating solution (no gas on the estate, getting connected not an option). I wondered if there are any engineers/MCS installers on here who'd care to give me an approximate quote for the installation of an air source heat pump (outside unit to be situated to rear of property outside kitchen window), thermal store etc. Basically everything apart from the radiator circuit (though would be interested in quotes with 5 rads installed too).

Approximately 46m2/500 sq ft floor area consisting of:-

Hall 14'11" x 2'10" - one double glazed uPVC door to outside
Bathroom (off side of hall) 8'3" x 5'1" - window area approx 0.36m2
Bedroom (off side of hall) 14' x 9'2" - window area approx 1.7m2
Lounge (off end of hall) 13'5" x 12'5" - door/window area approx 2.3m2
Kitchen (off lounge) 12' x 5'9" - window area approx 1.1m2
All rooms approx 2.2m tall. Floor plan attached.

All windows and doors are uPVC double glazed. Flat was built in 1973 and has cavity wall insulation, and is surrounded by flats either side as well as above. I've just put up new 12.5mm plasterboard ceilings with 50mm slab insulation behind it with an R-value of 1.35m2K/W (concrete block and beam construction above, wooden studwork).

Floor is concrete, I have thought about underfloor but it means either digging up the entire floor (a lot of time/effort/money) or going on top with another layer of floor, chopping the bottoms off doors etc). I suspect it's a bit out of my budget.

I've had a couple of quotes so far, both for Mitsubishi Ecodan 5KW systems. One quote came in at 8.9K including full install of rads etc. The other was about 5.9K excluding rads. Also had one quote of 4K+VAT+install cost for a Sanyo 4.5KW+tank+controls. Opinions anyone? Are these good prices?!

Hoping to get planning permission through in about 2 weeks. Fingers crossed.

Thanks

Tom