Oversizing an oil fired boiler

[Woody3]

I'm after an external, oil fired combi boiler - ideally a 21 or 26kW (for a two up two down cottage). Lack of space and gas only allows me this option.

Now, I've been looking a while, but have found a used boiler that looks ideal, however, it's a 36kW model, typical.

Simple question I guess, but is it a go-er or not? Do combi's need to run at full capacity for efficiency reasons?

I only have about 5 rads and one bathroom.

Cheers!

[Woody3]

Anyone?

[Woody3]

Thanks chaps - I thought as much.

I'll keep my eye out for a 21kW one. 👍