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[Amazon.ca] Radon Detector - Corentium Home by Airthings - $179.99

  • Last Updated:
  • Nov 28th, 2019 11:58 am
Sr. Member
Jul 20, 2009
741 posts
Mine is right around that 100 threshold
Deal Guru
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Nov 28, 2016
14808 posts
Out west
Second room for me was 67. I hope the trend continues
Deal Fanatic
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May 17, 2006
5960 posts
Miggggy wrote: Got one last monday....did a 3 day test one spot of my basement bedroom...shows a reading of long term 26 bq and short term of 8-11 bq....

I should be happy w my results but i was skeptical so i moved it close to a bed same basement bedroom and my 48 hour reading is 19 bq ans short term of 1-3bq

Hopefully the unit i bought is fine. Not sure if this is an unusually low radon reading
New house or older? I would inquire with neighbours or drop it at a basement of a friend or family member and see if you get similar reading or different.
Deal Addict
Jan 13, 2003
2135 posts
dealisdead wrote: An interesting read about acceptable Radon levels:

https://www.wired.com/story/to-radon-or ... -question/
that article is classic bad science journalism, and here's why: author finds a crazy guy who says radiation prevents cancer, writes article about him because it will get views. the other word for this is "clickbait"

in reality there are always differing results in science. the judgements we trust for our public policies are from professional organizations FULL of scientists deciding based on ALL work done. that doesn't mean they're perfect and never wrong, it just means they're more likely to be more perfect and less wrong than any random dude.
User avatar
Apr 27, 2012
402 posts
I have mine set up in the basement. Getting around 60-70 in an older home here in Ottawa.
Nov 10, 2003
67 posts
Got mine yesterday. Reading 45 in a 10 year old house in ETOBICOKE, toronto. Will be passing it in to friends and family in a couple of months.
Deal Addict
Jan 5, 2003
3957 posts
Just did an online chat with HD to price match. Was expecting them to deny or put up resistance due to different model numbers (many past posts here say it was successful, but some were denied), but it was no problem.

My opinion is that you consider on a risk/reward basis whether you should try to mitigate dangers. Even though there shouldn't be a lot of radon in my area, for about $190 after taxes for some piece of mind, plus the fact you can share it, plus I could probably resell it on Kijiji makes the cost minimal.

Say there was a very, very small risk of bad thing X and it would cost several hundred dollars for an one-time test, then I would say "forget it" and never worry about it.
Sr. Member
User avatar
Nov 1, 2017
510 posts
Home depot doesn't accept their gift cards online....

I bought 200$ worth of gift cards at shell for that sole purpose....
Deal Addict
Jan 22, 2008
2884 posts
PerformingAzura wrote: Home depot doesn't accept their gift cards online....

I bought 200$ worth of gift cards at shell for that sole purpose....
Return for refund at the store and then rebuy with gift cards.
Sr. Member
Dec 13, 2004
517 posts
PerformingAzura wrote: Home depot doesn't accept their gift cards online....

I bought 200$ worth of gift cards at shell for that sole purpose....
Had the same problem before, you have to email them with your order number and they can refund the gift card amount whichever way you paid. The email is ca_customercare@homedepot.com.

So place the order first, wait for the confirmation email and then email them, saying that you have a gift card that you want to apply to your purchase. They ask for certain things from the card. Just one thing to watch out for is that I don't recall what happens if the amount on the gift card is greater than the purchase amount...I felt that there was something different at the time I did this. Sorry I did this a while back and I don't recall. Might be a good idea to ask in the email if your gift card is larger than your order amount.

I wouldn't return to store and rebuy, I got burnt that way as well. If the store doesn't carry it they have no way of selling it to you as it won't be in the system.
Deal Guru
User avatar
Nov 28, 2016
14808 posts
Out west
Been testing for a week, tried each bedroom and living areas, all tests under 100, and the long term is around 85.
Jun 29, 2017
296 posts
I thought I'd share my radon notes. I know it's a lot to read, but still thought some might find it useful.

Some info on radon:
- https://www.canada.ca/en/health-canada/ ... radon.html
- https://www.canada.ca/en/health-canada/ ... -2013.html

Canada recommends levels be below 200; I believe US and UK recommend levels be below 100.

*** Some stats ***
Thanks to @RETD: best-buy-airthings-wave-wireless-radon- ... #p30192179
Radon Level Lifetime Probability of Getting Lung Cancer
Smoker* Base Level 12%
Smoker 200 Bq/m3 17%
Smoker 800 Bq/m3 30%
Non-Smoker Base Level 1%
Non-Smoker 200 Bq/m3 2%
Non-Smoker 800 Bq/m3 5%

*** Fluctuations: ***
Radon fluctuates through the year and weeks. In Ottawa, our house is around 130 in a dry summer, 175 in a wet summer and about 230 in winter with our HRV running.

*** Here are some things that can make radon increase: ***
- Colder weather, especially winter. Radon can't escape as easily through the soil.
- Rain. Radon can't escape as easily through water logged soil.
- Anything that vents outside (e.g. range hood fan, dryer, portable A/C). This will draw air of the house, which needs to be replaced. air/radon from the soil under your house may be pulled in.
- HRV / air exchanger issues (see section below)

*** Guides: ***
Health Canada: Reducing Radon Levels in Existing Homes: A Canadian Guide for Professional Contractors
https://carst.ca/resources/Documents/Re ... tors-E.pdf

*** Radon detectors ***
There are several - just read @tpirovol notes: best-buy-airthings-wave-wireless-radon- ... #p30102242
Another: Corentium Home by Airthings amazon-ca-radon-detector-corentium-home ... 9-2319071/

*** Mitigation: Sub-slab depressurization ***
The big one is sub-slab depressurization. Create a hole in your basement slab and vent outside from there.
Cost: ~$2500-3500 + tax done by a company. DIY $400-800 (~2 days).
There are some actions (below) that are required before this action (e.g. sump pit sealing, crack/hole sealing).
Below are some other easier starting points.
Lots of details in forums. Here's an example: best-buy-airthings-wave-wireless-radon- ... #p30192332

*** DIY migitation: HRV Air Exchanger ***
- Ensure your HRV is running. We stopped ours for week and radon went from 200 to 500. In Ottawa, we have a fan speed of 4 throughout the year. In summer, it's set to 40 mins re-circulate / 20 mins fresh air. In winter, it's 100% fresh air. These settings aren't the best for our HVAC systems in the dead of summer or winter. We're still experimenting with what's best.
- Ensure the HRV outside inlet cover/screen is clear of debris. When we bought our home it was fully plugged.
- Clean the filters on your HRV monthly. Check the filters on your furnace regularly too.
- Ensure your HRV is properly balanced. Radon Works recommended 15% positive.
- Optional: RadoStat (controls HRV based on radon level) - http://radoncorp.com/mitigation/radostat.php . Anyone used this?
- Note: An HRV that is unbalanced can have negative or positive pressure.
-- positive pressure draws less air in from outside and keeps more of the same air circulating in the home. This can cause radon gas to build up and not be vented.
-- negative pressure pushes more air out of the house than it is drawing in. Then air/radon gets pulled in from cracks to replace the vented air.

*** DIY migitation: Crack, holes, vents ***
- Seal cracks in cement basement floors and walls (where exposed). Our radon mitigator recommended this: https://www.homedepot.ca/en/home/p.self ... 84903.html
- Optional: Some window wells have drains that connect to the weeping tile around your house. Make sure these stay clear in winter to allow radon to vent out. (We added PVC pipe about 4 feet up).
-- Note: We considered adding a fan to this PVC piping to draw air out, but Radon Works said fans are prone to freezing in our climate in the winter.

*** DIY Mitigation: Sump pits (required) ***
- An unsealed sump pit is a common source of radon in the home. The mitigators I spoke to wouldn't evaluate our home until the sump was sealed.
- Weeping tile enters the pit, and if not submersed under water, this allows air/gases from under your house to easily enter the home.
- An air tight seal for your sump pit is typically required before radon mitigators will do anything. I did something like this:

- Adding a ventilation fan to a sump seal is not recommended if there are open drains / weeping tiles that enter the pit. You'll essentially be drawing a large volume of air from outside. If you do choose to go this route, a high airflow fan was recommended like the RN3 https://www.radondetect.ca/fantech-rn3- ... n-fan.html
- Dranjer makes drains that can be used in sealing a sump pit, so that if there is a water leak, the water can still make it to your pit and be pumped out by the sump pump: http://www.radondetect.ca/dranjer-floor-drains/

*** DIY migitation: Seal where the slab meets the wall. ***
Newer homes, built to code, should have a proper seal where the slab meets the wall, but many do not. If the vapor barrier was done perfectly, then the radon may seep up the walls and outside. Otherwise, accessing & sealing where the slab meets wall will help stop radon from entering the home. However, this is time consuming & challenging and may not solve the problem if small cracks are missed). Sub-slab depressurization would be better if one can afford it.
The sealing is often challenging since the following can be in the way: stud, vapor barrier, baseboards, drywall.
What some people do, is:
-- remove the baseboards
-- cut off a 3" strip of drywall (at bottom)
-- cut through vapor barrier
-- use 2 part 2 lb spray foam (must be mixed). Not the one-time use stuff in spray can. ~$400
-- put spray foam where slab meets wall.
-- replace baseboards with 5" high baseboard to cover removed drywall.

*** Radon fans: ***
The two most recommended radon fans are:
- RadonAway RP145 Radon Mitigation Fan, 4-Inch / Great reviews on amazon.ca / Price: $220
-- https://www.amazon.ca/RadonAway-23030-1 ... 00294RBFM/
-- https://www.radonaway.com/rp145-pro.php
- FanTech Rn2 Radon migitation fan 166 cfm 4.5" duct
-- https://www.amazon.ca/Fantech-Rn2-Radon ... B07F6ZYG3B
-- https://www.radondetect.ca/fantech-rn2- ... n-fan.html
-- Replacement for the well reviewed Fantech HP 2190 Radon Fan, 4.5" Duct, 163 CFM
-- For fantech, there are installation kits: http://www.radondetect.ca/installation-kits/