B
Burger
So if a fan flue'd room sealed boiler was giving a CO/CO2 ratio of 0.008 or above this would still be immediately dangerous? With a reading between 0.004 and 0.007 would be an at risk situation? The GIUSP was a good, informative read thanks.
I would say it would be AR above 0.008 and AR for your others. It just states unsatisfactory ratio’s is AR for flued appliance, doesn’t quote any ratio.