defination of non openable window

[thomas donovan]

the regs say that it would be id if following a test co level was 10ppm and rising but doesn't say what classification would be if the appliance passes test i would still say ar because it's so close to the window and there is a gas cooker in the kitchen which is another possible source of co and as glenn01 said the weather conditions may be more or less favourable on test day