Description
The overpressure valve is normally closed and will not open unless the air pressure inside the shelter is slightly greater than the outside air pressure. It opens when the Safe Cell is turned on and gives a little back pressure to the Safe Cell to help it create and maintain the positive pressure.
This gives you true ventilation – air in through the Safe Cell and out through this valve. This replenishes the oxygen and removes the carbon dioxide exhaled by the occupants.
Various models, materials, sized and installation options are available to fit almost any requirement.
