skiberd

All the acronyms here! It's pretty annoying the government grant doesn't cover the GS200 - if I did have outdoor space I could get a £10k system for the same price. With the low expected demand I'm leaning towards an efficient new combi (about £1800 for the Vitodens 050-W fitted) vs £5k+ for the ASHP route, unless there is a chance it would pay for itself. I'll wait to see what the Ground Sun engineers say as the unit is usually for new builds and not retrofitting. Maybe in a few years the tech will be a bit more accessible as it's a definite gap in the market...

Thanks everyone - from the spec (attached) I've been sent the GS200 has a COP of 3.16 and heats water up to 60C so hopefully I won't need fan assisted rads (any advice on radiators paired with an ASHP would be grand!) It supposedly runs at 49dB which I've just done a v unprecise experiment with using a decibel app and a video of a fan which seems fine - it's in the corner of the flat away from the bedroom, is in London and I have tinnitus anyway. Another total beginner question - is figuring out whether it'll pay for itself/be at least comparable versus a combi boiler as simple as multiplying the COP by my gas tariff? Plus I guess there's all the fun of trying to predict how much electricity and gas will go up over the next year or so, but you'd hope the UK makes itself less reliant on gas for a whole bunch of reasons GS200 brochure with technical data.pdf

Hi all, bit of a blank slate question here... I've recently purchased a 1960s former local authority flat in London that needs complete renovation. I'm a bit of an eco-zealot (we all are down here) and into new tech so was wondering what's the best way to heat it and for hot waters. I don't have the heatloss figures but it's 1 bed and 42 sqm with flats above, below and either side with thick concrete floors, ceilings and properly solid walls. It has windows facing east and west so gets decent sunlight all day and OK double glazing. It feels fairly well insulated, but I am coming from a wonky Victorian thing. I'll also be fitting cork flooring. I'm binning the bath so will only need hot water for a shower and two taps, and there are currently only 4 radiators (2 large, 2 tiny). Piping is all external so upgrading this will be a doddle. I had originally thought about getting rid of the whole wet system and going with 'smart' IR ceiling heaters and a Mixergy tank set to the Octopus tarriff but this is about £5K and I've read a lot of conflicting things about how much it will cost to run. Another options (assuming I don't get permission for an external fan unit) is the GS200 from Ground Sun with everything internal and in one unit (there are two big vents in the external wall where the old boiler is). About the same price, does both heating and water plus should be more efficient. The other option is swap out the ancient combi something modern for less than half the price and eat away my liberal carbon guilt with the savings. Fully open to ideas. Pretty mad there isn't more solid advice out there as there will be 000s of people in a similar position over the next few years. Thanks!