Reviews

In-depth reviews of individual products, evaluated against publicly available safety and certification information for the household hazard each one addresses.

Airthings Wave Radon Monitor Review

Continuous radon monitor · Radon
Recommended With Caveats
The stated accuracy (within 5% after 2 months) is Airthings' own figure; this site has not independently tested it against a reference radon source.
First Alert RD1 Radon Test Kit Review

Short-term radon test · Radon
Recommended With Caveats
First Alert's own materials reference an EPA-adjacent accreditation program whose current status this site could not confirm against today's radon-accreditation system (NRPP) -- an open question, not a confirmed or refuted one.
First Alert GCO1CN Combination Gas & CO Alarm Review

Fixed gas detector · Gas
Recommended With Caveats
The dual UL 1484/UL 2034 listing is stated by First Alert's own spec sheet and has not been independently confirmed by this site against UL's certification records.
Kidde C3010 Carbon Monoxide Alarm Review

Standalone CO alarm · Carbon Monoxide
Recommended With Caveats
The UL 2034 certification is stated by Kidde on its own data sheet and has not been independently confirmed by this site against UL's certification records.
GoveeLife 1s Water Leak Detector Review

Connected water sensor · Water Leak
Recommended With Caveats
This site could not confirm with certainty whether this specific listing includes the WiFi gateway required for app alerts -- check the listing's package contents before buying if remote alerts are why you want this sensor.
Kidde KN-COEG-3 Carbon Monoxide and Explosive Gas Alarm Review

Fixed gas detector · Gas
Recommended With Caveats
Kidde's own manual shows a UL 'listed' mark but does not name the specific standard number the way the First Alert GCO1CN's spec sheet does -- both remain unconfirmed manufacturer claims.
Kidde KN-COP-DP-10YH Carbon Monoxide Alarm Review

Standalone CO alarm · Carbon Monoxide
Recommended With Caveats
The UL 2034 certification and 85 dB rating come from third-party manual sources, not Kidde's own product page directly, and have not been independently confirmed against UL's records.
UEi CD100A Combustible Gas Leak Detector Review

Portable gas detector · Gas
Recommended With Caveats
UEi's own datasheet states no UL or other certification claim for this device at all -- if a certified device is required for your situation, this one is not it.