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I would really reconsider splurging for a gas boiler right now.
Even if your house is poorly insulated and leaky, a heat pump will work as long as you beef up your radiators. Friends of ours got a Mitsubishi Ecodan ASHP ~3 years ago, in an un-refurbed Victorian terrace with single-glazed dash windows and no insulation. All they did was upgrade the rads. Their bills were equivalent to those with their previous gas boiler, factoring in no more gas standing charges, Octopus smart tariff and smart controller programming.
They’ve now put in triple-glazing, UFH on ground floor and some insulation, and their bills are ~30% lower.
The £7.5K ASHP grant now means you’ll pay around the same price as a new gas boiler install, future proof yourself, and ur farts will smell delightful. It’s a no-brainer as far as I’m concerned.
ectoplasmosis-
I'm just not sure it's that simple - I'd need somewhere for the pump to go, plus I think leaky semi will be worse than terrace (one more exterior wall), and upgrading rads won't be cheap itself - we have what, 10 across the house, and they're all big? Plus pipework is relatively narrow stuff so I may need to upgrade that between the rads too.
I don't want to rule it out but I don't really buy the idea it won't be a lot more expensive to make it work adequately
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The £7.5K ASHP grant now means you’ll pay around the same price as a new gas boiler install
I'm assuming that's not counting fitting 10 new bigger radiators though (and whatever changes are required to fit those).
Although the biggest problem for me at the moment is how big they are if you have limited outside space.
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Flipping this process and upgrading the building fabric first and the buying the ASHP later would've resulted in a better outcome/more savings, no?
Gas standing charge is 30p a day, or £11o a year. The bills would've lowered by 30% by, so on the cautious side: 10,000 kWh * 30% * 25p per kWh = £750 a year by doing the building fabric upgrades first.
ASHP will become cheaper/better over the years (Octopus Red, etc). Getting the timing right by still switching towards the end of the ASHP incentives would be the ideal option.
andyfallsoff
aggi
JonoMarshall
Yep agree go big seems worthwhile...
The only other thing I'm thinking is pipe size from heat pump - seems to be larger bore than typical heating pumps so will need to work out how it gets from where the pump would be to the cylinder (or at least, think about access when we decide where to put the cylinder)