frsh O2

[Orion80]

I need a way to b able to get some frsh oxygen to my tank,m i know this sounds silly but, it seems thati have high co2 levels in my house or at least in my basement. Do furnances have fresh air intakes?? O r am i looking at haveing to drill a hole to the outside of my house to bring in frsh air??



Adie



Any and all ideas appreciate.