Exhaust pipe placement question
Hi all,
We have recently discovered that we have fluctuating radon concentrations that can go up to 400 Bq/m3 during the winter in our century-old house, and I'm currently planning our radon mitigation measures.
I'm pretty handy and am DIYing the mitigation systems. Since we have an old house with various complex features (concrete-capped stone foundation, portion in crawlspace, mix exposed soil/concrete basement floors), I want to go step by step in adding mitigation systems + testing between the installs to avoid overdoing things. I'm currently going in with the first install: a radon fan + exhaust over the sump pump hole.
I'm currently planning the radon exhaust position on the side of the house and am facing an issue finding the right spot for the final exhaust outside - see image attached. The red circle under the heat pump is the point where the pvc pipe will exit the basement. The Red line is option A (red line) for the exhaust pipe and end, and is what I had originally planned, but it seems closer to the windows than option B (yellow line), and makes for quite a longer pipe.
I know best practices involve going above the roof line but I'm more and more tempted to try out option B first and see how the radon readings go, especially as we are planning to add a deck to the left of the picture at some point. Option B seems to be the most centrally remote point from all the openings around.
The white cap on ground level to the right is the basement air-exchanger intake/exhaust (to be modified to move the intake away from the exhaust...another project!). The white cap in the middle of the wall is the kitchen exhaust
Anyhow, I wanted to have the thoughts of the community on the radon exhaust placement. If you see another option, please feel free to share! With Thanks!