Has any one carried out a test on laboratory ductwork using pepperment oil to establish leakes? and what is the acceptable leakage allowance for a PC3 laboratory in Australia? Ductwork & Room?
If internal lining is used in kitchen exhaust ductwork. Can the internal lining be faced with a perforated foil? or is only perforated metal acceptable? If a pervious lining such as melinex is used to seal the lining, is the melinex to go over the perforated metal/foil or inbetween the...
