Alternative a/c for the winter!!!?

Randm said:

negative pressure is when the air going out is less than the air comming in. I had 3 exhaust fans blowing out and a small hole that allowed air in. The intake hole was to small to effectively replace the air that was drawn out. It created low air pressure. Like a vacumm cleaner. Positive air pressure is the other way around, like blowing up a baloon. the air in the baloon has a positive air pressure in relation to the ambiant air pressure.

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Sir.Ganga said:

Maybe Im reading things wrong but I think you got ot backwards. Have a look

Negative Room Pressure to Prevent Cross-Contaminantion A negative pressure room includes a ventilation system designed so that air flows from the corridors, or any adjacent area, into the negative pressure room, ensuring that contaminated air cannot escape from the negative pressure room to other parts of the facility.

The only way to create neg pressure is if your exhausting more than you are bringing in. Pushing more fresh air into your grow than exhausting can effectively make your whole house smell like the product you are growing.

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