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Your MCS heat loss calcs done by the ASHP supplier most likely don’t factor in any prospective fabric upgrades that you’re planning, and a 1930’s detached 4-bed will be a thermal nightmare until it’s insulated properly so will need a huge, thirsty and expensive ASHP system to keep warm.
How much are your heating bills currently? What’s your thermostat set to?
Post up your ASHP quote.
ectoplasmosis-
Our heating bills are a little hard to figure out, we've not long moved in but we're paying about £300 a month for Gas and Electric and as mentioned its a split system with oil for part of the house, I would estimate we're using about £80 of oil a month just for heating (based on a refill we did and how much we're getting through on the oil monitor jobby)
I'm a little confused by the 22 rads, I count 15 and that includes one additional one in a bathroom that doesn't have one at the moment (its just a toilet/sink that we'll convert to shower room).
"Thermostat" is via the oil and gas boiler which are set to pretty low - range from 1-7 and they are on 2.
andos
It’s pretty old (30’s) and pretty shit given the current heating situation. That doesn’t include any insulation to even make an ASHP viable. That’s all being done separately (loft, loft room, underfloor insulation), new windows (single glazed atm).
At that price it’s well out of our means so back to the drawing board for us.