The boiler is a Potterton Suprima 60
It's sat in the utility, which _used_ to have a door through to the garage, but now doesn't. There's no ventilation in there at all - no air brick, no trickle vents, and now no cracks in the wooden floor to the (very well ventilated) void below. There's a uPVC door to outside, and a standard internal door through to the kitchen (which has an extractor fan to outside).
Obviously there's a small flu to the outside from the back of the boiler.
How do I find out or calculate what ventilation the boiler needs, if any?
There are lots of technical details written onto the boiler which mean nothing to me...
input (Gross) Q = 75000 / 63500kW Output = 60000 99000 kW Gas Rate = 210 CU 74 20 m/h 1-78 Cu 62-90 ft/h (all hand written, so please excuse typos).
It works, though there are still so many holes in the floors throughout the rest of the house that it's hardly starved of ventilation _yet_.
Any ideas? I'm going to get it serviced (though the previous owner claimed to have done so, and have it under an "expensive British Gas service contract"), but don't want someone to condemn it because of some problem.
Cheers, David.