Positive Pressure Fan Radon

Over 500bq a sump system or under floor ventilation system should also be considered as these are likely to be more effective at higher radon levels.

Positive pressure fan radon.

Macneish september 9 2007 9 58am 2. This method is called positive pressurisation or positive input ventilation. That is to say the exhaust is under positive pressure with regard to the ambient pressure of the structure if the pipe has a leak the radon will enter the building. Radon gas can damage cells in your lungs which can lead to cancer radon is responsible for about 21 000 lung cancer deaths each year in the united states though it usually takes 5 to 25 years to.

The flow of air and radon from the ground may also be reduced. Positive ventilation brings fresh air into a home and dilutes the radon. Almost all buildings exert a negative pressure suction on the soil because of the natural stack effect and exhaust devices that exist in all buildings. The fan draws clean air into the property and disperses it around the property to very gently pressurise the building.

What s the proper term for the pressure of soil source gas and what. Has positive air pressure been used for radon mitigation. The introduction of this extra air raises the internal air pressure slightly thus inhibiting the draw of gas from the soil which normally occurs. The radon gas concentration in any building is determined by the radon concentration in the soil soil permeability and the pressure differential between the soil and the building.

It involves a special fan being installed either within the loft or on an external wall to disperse air through the building. 2 placing the fan in such a position that the radon is pushed along the exhaust pipe rather than pulled through the exhaust pipe. Positive pressure fans are more effective where radon levels are below 500bq. A positive pressure system is used to reduce radon levels in buildings.

A positive ventilation system can be effective in homes with radon levels up to and around 500 bq m 3. Exhaust fans further decrease the air pressure so using them actually increases the concentration of radon in the air. Radon comes into your home or office because the air pressure is lower than it is outside drawing radon in like a vacuum.