Silent Home Hazards
Independent guides to the household hazards you cannot see, hear, or smell. This site evaluates detection and prevention products for carbon monoxide, radon, combustible gas, and water leaks against publicly available product and safety information -- structured as a record, not a sales pitch.
Start with a hazard
Every product recommendation on this site starts from a specific household problem.
Do I need a carbon monoxide detector, and where do I put it?
Carbon monoxide is colorless and odorless and can only be detected with a dedicated alarm. What to know before choosing a standalone CO alarm.
RadonWhich radon monitor should I buy for ongoing monitoring?
A short-term radon test gives a snapshot, but levels vary by season. What to know about continuous digital radon monitors for ongoing readings.
GasI smell gas / worried about a gas leak
Natural gas and propane are scented so leaks can be smelled, but a slow leak can still go unnoticed. What to know about choosing a combustible-gas detector.
Water LeakHow do I prevent water damage from leaks I can't see?
Slow leaks under sinks, washing machines, or water heaters often go unnoticed until real damage occurs. What to know about early-warning water leak sensors.
RadonIs my house's radon level dangerous?
Radon is a radioactive gas with no smell, color, or taste -- testing is the only way to know your home's level. How to start with a short-term test.
How this site verifies claims
Every recommendation on this site is checked against publicly available product and safety information, not taken on a manufacturer's word alone.
- Sourced, not assumed. Every safety claim we publish ties back to a specific manufacturer or regulatory source, named on the page that carries it.
- Uncertainty stays visible. A claim we haven't independently checked is marked as unconfirmed -- never presented as settled fact.
- No in-house lab testing. We check ratings against public standards and registries; we don't fabricate our own test results.
Explore product reviews
A sample of the in-depth, product-specific reviews on this site, each evaluated against the verification standard described above.
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Airthings Wave Radon Monitor Review
Recommended With CaveatsThe stated accuracy (within 5% after 2 months) is Airthings' own figure; this site has not independently tested it against a reference radon source.
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First Alert RD1 Radon Test Kit Review
Recommended With CaveatsFirst 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.
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First Alert GCO1CN Combination Gas & CO Alarm Review
Recommended With CaveatsThe 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.
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Kidde C3010 Carbon Monoxide Alarm Review
Recommended With CaveatsThe 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.