Mmm.

tks Marc, tks Hard,

Was at HD this morning -- coulda been aisle 9 actually -- and did see an interesting package of carbon something or other filtration material folded up into plastic wrapping - about the size of a beach towel.

Box is built - pics soon - was shopping for ductwork. Got a pint size jar of Carbon last week.

Extensive Data as you mentioned above M, explains why that filter Z or somebody had posted was so elaborate. Layered packets of carbon inside a 4 to 8 inch length of 4" ductwork.

Wonder if anybody has any figures on how often say a packet or a pints worth or a litre's worth of granules might last before activation.