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expired Posted by phoinix | Staff • Jan 4, 2025
expired Posted by phoinix | Staff • Jan 4, 2025

Airthings Corentium Home Portable Radon Detector (223)

+ Free Shipping

$81

$150

46% off
Amazon
140 Comments 55,800 Views
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Note: This recent Frontpage Deal is now available at a lower price.

Amazon has Airthings Corentium Home Portable Radon Detector (223) on sale for $81.25. Shipping is free.

Thanks to Deal Hunter phoinix for sharing this deal.

About this Item:
  • The first battery-operated, digital radon detector. Monitor your home without the need for an outlet.
  • Monitor for cancer-causing radon gas. Long term monitoring is necessary as radon levels fluctuate daily.
  • Take action if your radon levels are high. Know if your improvements have worked by checking the short term, on-screen readings.
  • Generate a radon self-inspection report easily, whenever you need it.
  • On-screen results show both long and short term readings, for a quick overview of your radon levels.

Editor's Notes

Written by powerfuldoppler | Staff

Original Post

Written by phoinix | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Note: This recent Frontpage Deal is now available at a lower price.

Amazon has Airthings Corentium Home Portable Radon Detector (223) on sale for $81.25. Shipping is free.

Thanks to Deal Hunter phoinix for sharing this deal.

About this Item:
  • The first battery-operated, digital radon detector. Monitor your home without the need for an outlet.
  • Monitor for cancer-causing radon gas. Long term monitoring is necessary as radon levels fluctuate daily.
  • Take action if your radon levels are high. Know if your improvements have worked by checking the short term, on-screen readings.
  • Generate a radon self-inspection report easily, whenever you need it.
  • On-screen results show both long and short term readings, for a quick overview of your radon levels.

Editor's Notes

Written by powerfuldoppler | Staff

Original Post

Written by phoinix | Staff

Community Voting

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+139
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Model: Airthings Corentium Home Radon Detector 223 Portable

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Sort: Lowest to Highest | Last Updated 5/12/2025, 01:10 PM
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Top Comments

Radon comes out of the rocks in the dirt under your house. Thus, you're much more likely to have radon in your house if you have a crawlspace than if you're on a slab. Miitigation means two things.

One, trying to seal up all the holes that allow air exchange between under the house and inside the house. This includes walls when there is a gap behind the wall that goes to the crawl, like where sewer vent pipes come up.

Two, puling the air out from under the house before it can diffuse up into the living space. This means an exhaust fan. The problem here is that if you pull too much air out, especially if there are a lot of holes into the living space, that exhaust pulls air out of the living space, which will massively jump your heating or cooling bills up. Mitigation contractors will often lay plastic sheeting down in the crawl and put air intake pipes under it, but then no one can ever work in the crawl again because you'll poke holes in the plastic sheeting by crawling over it and it's now worthless. But sealing the holes between crawl and living space is hard because there are a lot of them and they're often behind cabinets. There's no magic to it.
No, I don't have it backwards.
You probably live in a warm area, where crawlspaces are vented.
Anywhere that winter temperatures drop significantly below freezing, venting the crawlspace enough to get rid of radon would cause your pipes to freeze.

Most areas with significant radon risk freeze during winter. Here's the EPA's US map:
https://www.epa.gov/radon/epa-map-radon-zones
Great price on a great tool- I used this very device to show my radon levels were dangerously high. After mitigation, the level has dropped to well within normal levels.

140 Comments

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Jan 4, 2025
217 Posts
Joined Nov 2019
Jan 4, 2025
PixelPioneer
Jan 4, 2025
217 Posts

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Great price on a great tool- I used this very device to show my radon levels were dangerously high. After mitigation, the level has dropped to well within normal levels.
1
2
Jan 4, 2025
776 Posts
Joined Dec 2013
Jan 4, 2025
kupop2
Jan 4, 2025
776 Posts
Ordered for 91 yesterday, at least I selected slow shipping. Easy cancel and reorder
1
1
Jan 4, 2025
673 Posts
Joined Dec 2014
Jan 4, 2025
bostonman
Jan 4, 2025
673 Posts
Just ordered one. Thanks
Somehow Amazon throw in another $2 discount so it is $79 for me
Jan 4, 2025
1,578 Posts
Joined Nov 2017
Jan 4, 2025
FookNoe
Jan 4, 2025
1,578 Posts
This or Wave version?
1
Jan 4, 2025
3,675 Posts
Joined Dec 2013
Jan 4, 2025
kalirob99
Jan 4, 2025
3,675 Posts
Quote from PixelPioneer :
Great price on a great tool- I used this very device to show my radon levels were dangerously high. After mitigation, the level has dropped to well within normal levels.
What are some recommended mitigations to lower levels?
Jan 4, 2025
5,503 Posts
Joined Feb 2007
Jan 4, 2025
fuzzyfacedog
Jan 4, 2025
5,503 Posts
The round one that connects to app is best. You get alerts. This one you have to look at.
5
Jan 4, 2025
5,503 Posts
Joined Feb 2007
Jan 4, 2025
fuzzyfacedog
Jan 4, 2025
5,503 Posts
Quote from PixelPioneer :
Great price on a great tool- I used this very device to show my radon levels were dangerously high. After mitigation, the level has dropped to well within normal levels.
What's normal?
1

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Jan 4, 2025
1,942 Posts
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Jan 4, 2025
ALS
Jan 4, 2025
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Quote from fuzzyfacedog :
What's normal?
4 or less
1
1
Jan 4, 2025
294 Posts
Joined Dec 2004
Jan 4, 2025
orthros
Jan 4, 2025
294 Posts
Really surprised this isn't getting more love. I bought one of these for $100 back in May 2021 and it's one of the best purchases I've made. It's so much better than the cheap mail-in tests, can be used more or less continuously, can be lent to family so they can see their radon levels, etc.

Totally recommend a purchase at $80
2
Jan 4, 2025
284 Posts
Joined May 2006
Jan 4, 2025
DouglasBaker
Jan 4, 2025
284 Posts
Quote from kalirob99 :
What are some recommended mitigations to lower levels?
Basically to drill a hole in your floor and attach a pipe with a fan on it to vent it outside
Jan 4, 2025
47 Posts
Joined Nov 2011
Jan 4, 2025
Yuragk
Jan 4, 2025
47 Posts
$77+ black version, check sellers.
https://www.amazon.com/dp/B0CPZ3M9VN
1
Jan 4, 2025
68 Posts
Joined Oct 2006
Jan 4, 2025
opello
Jan 4, 2025
68 Posts
Quote from kalirob99 :
What are some recommended mitigations to lower levels?
Sealing and venting the sump pit to the outdoors is the common mitigation. It's a fairly inconvenient solution and ignores that concrete is permeable. I think adding an air exchanger to a central air system is a better solution. Really any solution that replaces indoor air with outdoor air at the recommended rate (I think 1 full turn over every 4 hours) should work.
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Jan 4, 2025
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IndigoKnob7008
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Jan 4, 2025
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Quote from kalirob99 :
What are some recommended mitigations to lower levels?
Radon comes out of the rocks in the dirt under your house. Thus, you're much more likely to have radon in your house if you have a crawlspace than if you're on a slab. Miitigation means two things.

One, trying to seal up all the holes that allow air exchange between under the house and inside the house. This includes walls when there is a gap behind the wall that goes to the crawl, like where sewer vent pipes come up.

Two, puling the air out from under the house before it can diffuse up into the living space. This means an exhaust fan. The problem here is that if you pull too much air out, especially if there are a lot of holes into the living space, that exhaust pulls air out of the living space, which will massively jump your heating or cooling bills up. Mitigation contractors will often lay plastic sheeting down in the crawl and put air intake pipes under it, but then no one can ever work in the crawl again because you'll poke holes in the plastic sheeting by crawling over it and it's now worthless. But sealing the holes between crawl and living space is hard because there are a lot of them and they're often behind cabinets. There's no magic to it.
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Jan 4, 2025
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IndigoKnob7008
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Quote from LaughinGass :
You have that backwards. A crawlspace creates an air gap that allows ambient air to flow underneath and carry the radon particles away. A slab permeates gas, but it comes directly into your house.
No, I don't have it backwards.
You probably live in a warm area, where crawlspaces are vented.
Anywhere that winter temperatures drop significantly below freezing, venting the crawlspace enough to get rid of radon would cause your pipes to freeze.

Most areas with significant radon risk freeze during winter. Here's the EPA's US map:
https://www.epa.gov/radon/epa-map-radon-zones
4
1
4

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