Hello
Looking to upgrade a system for a house that was extended, the current system is from the 1980’s just with new rads.
The house has 6 bedrooms (3 large, 2 medium, 1 small) , 3 bathrooms, 11 type 22 rads, 3 towel rads. No under floor heating. 9 Occupants.
I want to install a unvented...