Our oil combi boiler has reached the end of its life. No mains gas here, so we have narrowed down the options to another oil boiler or ASHP (open to other suggestions though).
5 bed house (177 square metres, built 2006), 3 shower rooms, 1 bathroom. We have a large multi-fuel stove in the lounge, which (if we open all internal doors) provides most of our heating needs in the winter. 19C is warm enough for us. Our eldest is a joiner, so plenty of free scrap wood for the stove).
We use about 1500 litres of kerosene a year.
We also have a 4kw solar pv system (south facing) with 6.5 kwh battery.
Our last EPC (about 8 years old, done prior to fitting the solar panels) gave a rating of 74 (C). Recommendations were to put in a new condensing boiler and solar panels, which would raise rating to B.
The above would appear to be promising on the ASHP front (subject to the usual heat loss survey etc) and the solar panels would hopefully provide energy for DHW during the warmer months.
About 3 months ago, a local ashp company gave us a rough estimate of 14k to fit ashp (likely 12 or 14kw), water cylinder and 12 new radiators. On that basis, about 9k (if we can get a BUS grant). Two quotes to replace the existing boiler (with another oil combi) suggest 5.5k plus VAT, which isn't all that much less than the ASHP would cost. That surprised me.
We can survive without a boiler for now (cold showers in summer are fine, and my mother-in-law is a 5 minute walk away for when a hot shower is too much to resist) but time is a factor.
My heart says ASHP, as I'd love to be free of dependency on fossil fuels. It would be good to get back the garden space occupied by the oil tank. Would also be good to maximise use of the energy generated by the solar panels.
On the other hand, our relatively low kerosene consumption is also a factor, and getting an oil boiler fitted is likely to be subject to less delay than the ashp option.
Grateful for any general advice.
Many thanks
Martin