I had the radon checked in the basement 1 yr ago. It measured 6 pc/L. I paid to have a sub slab depressurization system put in. It maintains 2.5 inches of water vacuum. I also installed an electronic continuous radon monitor. In the summer when the swamp cooler runs the radon level drops to almost zero. In the winter the furnace runs and the levels go up to
16 pc/L. The sub slab system is useless as the soil is bentonite clay, it has zero porosity. The contractor guaranteed results but it is like pulling teeth.I want to pressurize the basement to stop the radon. I'm thinking of forcing air from the first floor into a semi sealed basement through a floor register via a duct fan. Here's my questions:
- Can I use a radon fan to pressurize the basement?
- If so, will it operate ok upside down?
- Will excessive over pressurization cause problems with the furnace and hot water heater (both natural gas) in the basement?
- How many inches of overpressurization is ok for the basement? I have a filter manometer to measure this with.
- Is there a better way to do this?
- What fan would be best?
I want the system to run quietly for years w/o maintenance.
Thanks all,
The "Tool"