Radon mitigation or ERV for old home with dirt wall basement?
Home was built in 1935 and has 5′ dirt and rock walls with a small crawl space above that to the bottom of the upstairs floors which are hard wood when your in the in the basement. Radon measured at 7.7 upstairs above that space. I have a thermopride oil furnace down there also. Radon guys telling me it could cause neg. pressure situation with possible back draft or pull exhaust fumes out of the furnace in the basement area. There is an open walking area the size of a regular sized room where the stairs come down and the furnace and water heater are all easily able to work on
An ERV was recommended for creating a positive pressure situation and hopefully pushing the radon out. They had some plastic put down years ago which is mostly just hanging over the wall and not sealed at all.All vents are sealed off to basement from outside also.
I have very small crawl space and because of the age of the house and the way the house is sitting on rocks and so forth down there, a real good seal will be difficult which is what concerns the guy that I had look at it for the regular radon mitigation. He thinks it will create a whole area of neg. pressure down there, not just behind the plastic where it is suppose to be. Should I have them put the plastic down and do as best they can and then put the ERV in??
Radon guy is reluctant to install a neg. pressure radon removal.
I am confused what to do.. Any suggestion or remedy would be helpful.
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