Corentium Home 2 vs Aranet 4 Home

Compare sensors, connectivity, certifications, and price side by side, based on official product specifications and manufacturer documentation.

Last updated September 15, 2026 · Comparison published by Airthings

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Radon coverage gap

Corentium Home 2 measures radon. Aranet 4 Home does not. Radon is a colorless, odorless radioactive gas — the second leading cause of lung cancer in the US (EPA). Because you cannot detect it without a sensor, this is a meaningful difference for long-term home health monitoring.

Corentium Home 2

Airthings

Corentium Home 2

Radon COâ‚‚ VOC PM2.5

Connectivity: Bluetooth Low Energy (standalone; SmartLink to Hub/View devices for remote access)

Power: 2x AA batteries

$179.99

Shop Corentium Home 2

Aranet

Aranet 4 Home

Radon COâ‚‚ VOC PM2.5

Connectivity: Bluetooth LE

Power: AA batteries

$249

Technical specifications

Feature Corentium Home 2 (Airthings) Aranet 4 Home
Radon detection Yes No
COâ‚‚ monitoring No Yes
VOC monitoring No No
PM2.5 monitoring No No
Connectivity Bluetooth Low Energy (standalone; SmartLink to Hub/View devices for remote access) Bluetooth LE
Power source 2x AA batteries AA batteries
Battery life Up to 3 years Up to 4 years
Remote access has Bluetooth and syncs to the Airthings app – readings are also shown directly on the device's built-in display. Free Aranet Home app, view 90-day history
Works with Airthings app (iOS, Android, Web); SmartLink integration with Airthings Hub/View monitors for remote access iOS, Android
Mobile app Yes Yes
Web app Yes No
Subscription Not required Not required
Warranty 1 year (5 years with registration) No information located
Price $179.99 $249

Want to understand what these pollutants actually do?

Radon, COâ‚‚, VOCs, and PM2.5 each affect your health differently. Our resource library breaks down what each one is, how it gets into your home, and what levels actually matter.

Explore air quality resources

Certifications and eligibility

Corentium Home 2

  • ✓ HSA/FSA eligible via Truemed — Purchasable with pre-tax Health Savings Account or Flexible Spending Account funds (via Truemed).

Aranet 4 Home

None specified.

Value and ownership costs

Corentium Home 2

  • Price$179.99
  • SubscriptionNot required
  • Warranty1 year (5 years with registration)
  • BatteryUp to 3 years
  • + Includes Radon monitoring not in Aranet 4 Home.

Aranet 4 Home

  • Price$249
  • SubscriptionNot required
  • BatteryUp to 4 years

Airthings

Ready to know what's in your air?

Corentium Home 2 gives you certified radon detection, CO₂, VOC, and more — all in one device, with no subscription required.

Shop Corentium Home 2 Explore all monitors

Frequently asked questions

These two devices have different sensor coverage. Corentium Home 2 additionally measures radon. Aranet 4 Home additionally measures COâ‚‚.

Corentium Home 2: has Bluetooth and syncs to the Airthings app – readings are also shown directly on the device's built-in display.

Aranet 4 Home: Free Aranet Home app, view 90-day history.

Radon is a naturally occurring, colorless, odorless radioactive gas that comes from the breakdown of rocks and soil. It enters homes through cracks in foundations and gaps such as around plumbing entry points. It is the leading cause of lung cancer among non-smokers and the second leading cause overall (US, EPA, and WHO). The EPA recommends fixing your home if the average radon level is consistently at 4 pCi/L or higher, and considering action if it is between 2 and 4 pCi/L. Because both of these devices monitor radon continuously over time, they give a more reliable picture of your exposure than a single short-term test kit.

Specifications for Corentium Home 2 come directly from the Airthings product catalog, so they automatically stay up to date. Aranet 4 Home is not part of our product catalog, so its specifications are sourced from their website and product spec sheets, updated periodically.

Airthings products purchased directly from airthings.com can be returned using their 45-day money back guarantee.

Corentium Home 2 specifications are sourced directly from the Airthings product catalog. Aranet 4 Home specifications are sourced from publicly available manufacturer documentation, spec sheets, and retailer listings as of September 15, 2026. Prices and specifications are set by the manufacturer and are subject to change without notice; figures shown here may not reflect current availability. Airthings is not affiliated with, endorsed by, or sponsored by Aranet. All product names, logos, and brands are property of their respective owners and are used for identification purposes only. As of September 15, 2026, items labeled "No information located" reflect that information was not found on the competitor's website or on the product or materials accompanying it. Absence of located information does not indicate absence of the feature. Contact support@airthings.com for corrections.