Category General

Best HVAC filters and MERV rating guide. CDC-recommended MERV 13 picks. Filtrete, Honeywell, Nordic Pure, FilterBuy, AIRx tested on capture efficiency and pressure drop.

Best carbon monoxide detectors tested against calibrated CO sources. Kidde, First Alert, Nest Protect, X-Sense compared on accuracy, response time, smart features.

Best dehumidifiers for mold prevention tested in a 1,200 sq ft basement. Frigidaire, hOmeLabs, GE, Honeywell, Midea compared on capacity, drainage, energy use.

Best home air quality monitors tested against a calibrated reference. Airthings, Awair, Govee, Temtop, IQAir compared on PM2.5, CO2, VOC, radon, humidity accuracy.

Best HEPA air purifiers for allergies tested in a 200 sq ft chamber on PM2.5 and ragweed pollen. Coway, Levoit, Honeywell, Blueair, IQAir compared.

Manganese in well water — EPA health limits, infant exposure risk, and five best treatment systems tested at 0.18, 0.6, and 2.3 mg/L manganese loads.

Best pressure tanks for well water tested on 5–15 gpm pumps. Drawdown sizing, pre-charge setup, and Amtrol, Flexcon, WaterWorker, AO Smith, Goulds compared.

Rotten egg smell in well water — three sources explained and five best removers tested at 0.4, 1.8, and 4.2 mg/L H2S. Air injection, catalytic carbon, peroxide injection compared.

Best whole-house reverse osmosis systems for well water tested on 1200 and 2100 mg/L TDS samples. iSpring, Crystal Quest, WECO, Express Water, APEC compared.

How to test well water at home: certified mail-in labs, strip kits, and county testing options compared. SimpleLab, Watersafe, First Alert, Industrial Test Systems reviewed.