akaPABLO01
Member
You’re probably looking at a 14kW unit heat pump. Depending on bathrooms and bed with en-suite maybe 270-300 litre cylinder. Ashp would work well, hp, cyl, 5 standard rad upgrade and install with rhi application £12,500 with up to £10,000 rhi. Yours may only pull in £7,500 at a guess?So what would recommend for new build 170 s/m Bungalow , ? , how many meters of pipe do you need to put in the ground ?, would you put any solar panels on the roof ?
Gshp, it depends on your soil type as to what number of slinkies go in the ground. We usually air on caution and use 1WmK. That’d be 6+ slinkies depending on how much heat loss is calculated and hp size to cope. These systems are extremely invasive on install, the digging and plant/pump room. So this install is rather more expensive. You should be seeing £25,000+ for install with a caveat: you do ground work. Return on rhi could see up to £30,000. Your return, maybe £20,000/£25,000 at a guess, depends on your epc.
This only looks at domestic rhi, a more popular approach would be to create district heating systems. To support hot water compliment it with solar thermal and twin coil cylinder. Payments are the made on hp size x 1314 (annual heat required) for tier 1 then tier 2 outside that. There are requirements involved such as shared heat pump(s).
I always recommend solar, get it installed especially new builds.