I recently bought a worcester danesmoor 20/25 utility oil boiler but am not sure if it's big enough to heat my house. What do the numbers 20/25 mean ? is it the boiler or the pump that makes the difference
Obviously it depends how big your radiators are as to how many the boiler will actually heat, but as a rule of thumb I would expect to see a boiler of this size in a 4-5 Bedroom property.
hope this helps