do we need to exhaust air from wet well to meet NFPA 820 requirements or just supply outdoor air
do we need to exhaust air from wet well to meet NFPA 820 requirements or just supply outdoor air
(OP)
Do we need to supply and exhaust air to/from wet well at the rate of 12/30 air change to meet the requirement of NFPA 820 or just supply outdoor air.





RE: do we need to exhaust air from wet well to meet NFPA 820 requirements or just supply outdoor air