baxi boiler & ventilation

[Reg Man]

Good point, But only in Radon gas risk area's. There are loads of underfloor vents not ducted, it don't make it wrong.

 

[stevetheplumber]

floor vents are fine ive not heard anything to the contrar yalways good to check the air bricks havent been built over

 

[GrahamM]

I think this NCS is from BG have followed them onto a couple like this

As far as I know floor vents are perfectly acceptable to BG/SG as well.