What size heat pump, roughly?
Ten seconds, no account. A ballpark from your home's age, size and type — and the one question worth asking before you accept a quote.
Your rough heat pump size
7.8–8.5 kW
A ballpark from age, size and type — a real survey checks every room.
If a quote says much more than this, ask why.
The design-day cold happens about 1% of the year. A heat pump sized far above your home's real loss spends the other 99% oversized — cycling on and off, running less efficiently, and wearing itself out.
Want the real number? A proper room-by-room heat loss survey is the only way to size and quote a heat pump correctly — and it's worth insisting on. Your installer can run ours: the LatterHQ Heat Loss Calculator.
Estimate only — typical fabric for the age you picked, floor area from bedrooms, design weather from your postcode area. Not a survey, not a quote, and no substitute for either.