Radon mitigation system outlet

Miscellaneous Inspection Topics IAC2 Indoor Air Forum
1

Decided to create new thread.

1 year warranty inspection.

Radon piping runs behind garage door header.

What would you report and why?

                                                                                         Attached Thumbnails                                           [http://www.nachi.org/forum/attachments/f21/28056d1240078569t-radon-53-trib-002-medium-.jpg](http://www.nachi.org/forum/attachments/f21/28056d1240078569-radon-53-trib-002-medium-.jpg)    [http://www.nachi.org/forum/attachments/f21/28057d1240078584t-radon-53-trib-003-medium-.jpg](http://www.nachi.org/forum/attachments/f21/28057d1240078584-radon-53-trib-003-medium-.jpg)    [http://www.nachi.org/forum/attachments/f21/28058d1240078593t-radon-53-trib-004-medium-.jpg](http://www.nachi.org/forum/attachments/f21/28058d1240078593-radon-53-trib-004-medium-.jpg)
2

Mike,

I’ve never seen a radon pipe system go through a garage.

Does this pipe penetrate a slab/basement floor?

Where’s the fan system?

The terminating vent should be above the roof line.

3

The termination not going through the roof line is the only thing I see with it too. Practically, i don’t see that as being an issue where it is, although technically its wrong.

4

Yes,

I posted this thread for the purpose of discussion and clarification.:wink:

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5

Ok, I see that the fan is operating normally.

The only thing that stands out is… the vent should terminate above the roof line.

6

Agreed but what do you tell the client to back that up :wink:

And

Above the first or second roof line?

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7

Mike,

I would imagine the second (higher) roof line would be better than a lower roof line installation. A lower roof line installation would be improper venting due to the proximity of the sidewall.

I wouldn’t necessarily tell my client which roof line. I would simply note that a properly installed radon mitigation system must termite above the roof line. I would then recommend a radon mitigation specialist to evaluate and estimate costs of bringing the termination to proper levels.

8

David, I added a pic to the previous post.

9

Mike,

The highest roof line would be the only solution to this upgrade. The lower roof line will not allow proper ventilation with that wall next to it.

http://www.epa.gov/radon/rrnc/index.html

10

I think the wording is eave, not rake.

Distance to adjacent windows must be considered.

11

From **ASTM 1465

**

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12

18.7.9

Although I think the real issue here is does the radon pipe in the garage compromise the firewall if/where it passes through to the home. And unlike a mere firewall compromise… a radon fan is pulling 270 cfm… and so makes for a nice fire flue.

13

Yes it is an issue to be aware of but if you look at pic 1 in the first post you will see that the appropriate fire stop is in place where it penetrates the living space just as it is in this photo.

http://www.newiradonspecialist.com/images/fire-collar.jpg