Another should I or shouldn't I.

aj_ok · 2021-04-16T16:06:57Z

Like many others I am tempted by the perceived advantages of a ASHP. Why... Our home is a 1990s 4 bed detached 183 square meters, urban setting. Current epc efficiency is D(55). Boiler is as old as the house. We are looking in the next 2-3 years doing a kitchen single story extension which will include loosing the utility and replacing and moving boiler to the garage (condensing as combi wouldn't work well for house). House is recently newly double glassed, albeit side door and patio in the kitchen area that will be changed in the build. We have 2x en-suites (electric shower currently) plus bathroom and downstairs toilet. There are aprox 20 radiators. We have no UFH (but plan to in the kitchen/living area following extension) and just rads thorough. May need to increase loft insulation (currently 150mm) Over the month of Dec-Jan our gas use (cost) was highest at £115. We are on an octopus go tariff for electric (5.5p/kwh between 20.30 and 01.30, otherwise 13.5p/kwh. Gas predicted annual use is 25213kwh at 2.74. (Have a PHEV car) We have has a company visit and quote for a ASHP (all worse case/most expensive a 14kw mitsubishi ecodan). Including the work, mounting the pump on the wall high level on side of house, replace all rads (hopefully not the 3x designer in 2 rooms), and tank relocated in loft side where pump will be, aprox £14.5k (may be less following tech survey and detailed heat loss survey). Should be at the max RHI claim as well with the figures shared with the company. Inc all works and removal of existing systems and waste. Only had the one quote (Greener Living) so cant compare but looking at others quotes here, seems reasonable. After a moment of excitement (after 7 years with RHI claim back, the cost may represent that of around £2-3k), however it appears that running cost may be significant high even after correctly setup/installed. I suppose I have to await the detail calculations to understand what to expect to be paying in electric costs and RHI payments. I know we will need to adapt, my wife does like to crank that 'stat for almost immediate hot to the touch radiators, which will be nigh impossible with the system. Questions: Any experience with the company, like most there are very positive and damming reviews around? Is the cost reasonable? Should I wall mount an ASHP onto the house, would noise and vibrations be noticeable (bathroom is on the other side of the wall), or rather ruin the look of the rear, which would be to the side of bi-fold doors? Thanks for your time and patience reading this

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Air Source Heat Pumps (ASHPs)

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JulianC

(@julianc)

Noble Member Member

Joined: 4 years ago

Posts: 321

28/10/2021 3:01 pm

@kundk I don’t know Greener Living. But too top would be to get more quotes to compare. Ask questions and see how different companies answer them. And take a judgement, not just on price. But the quality of the heating engineer who is designing the system. This is key. I am beginning to think one as Tis very similar to another ASHP (though I’m happy with my Daikin).
Good luck

Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and new Hyundai Ioniq 5 N electric vehicles with Myenergi Zappi mk1 charger

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