First and foremost rather than having the fan and venting pipes on the outside of the home an interior system means that the only visible component on the outside is the vent stack that rises through the roof.
Radon fan in attic.
Radon fans and electrical components are out.
Radon fans inside attic spaces are better protected from the freeze and thaw cycle.
A garage attic installation runs pvc piping from the sub slab radon collection point created in the slab through the garage where a radon mitigation fan has been installed.
This radon fan is designed for moderate to good air flow working most effectively with sub slab or sub material conditions ranging from about 4 in.
Electrical components are out of reach.
The radonaway rp145c radon fan is built to resist moisture and can be mounted inside or outside on a 3 in.
Instead of having the fan and venting pipes on the outside of the home the only visible component on the outside is the vent stack that rises through the roof.
Radon mitigation system information.
In cold environments this condensation can freeze and effect the life of the radon vent fan.
Benefits of a radon mitigation system installed in the attic the radon system is hidden.
If the radon fan is located in the attic of the house or garage you can wrap the fan with fiberglass insulation.
The radon system is hidden.
Of clean size 4 6 gravel to very loose soil.
The air flowing through the fan will maintain the fan temperature.
Radon fans are better protected from the elements.
Radon systems create condensation within the suction and exhaust pipes.
I have never found a radon fan more than a bit warm even if the motor has been stalled by some blockage so there appears to be no concern about causing a fire from.