Pharaoh definition, meaning, English dictionary, synonym, see also 'Pharaoh ant',Pharaoh's ant',Pharaoh ant',Pharos', Reverso dictionary, English definition, English vocabulary Translation Context
The intake to this ventilation. system must be near the floor. (Chlorine as a gas is. 2.5 times heavier than air.) Exhaust Rate The exhaust system must be able to exchange the air. in the room every three to four minutes.
The chlorine gas will evaporate from the water in 24 to 48 hours. A wider opening will allow a larger area of the water's surface to be exposed to the atmosphere, which means the gas will dissipate more quickly.