Gear guides · updated October 12, 2026
Monitor it before you fix it
Radon kits and monitors, air quality sensors, CO alarms, hygrometers and water test kits measure what is going on in your home; purifiers and dehumidifiers act on what they find. Here are three picks per category, what each one is for, and the buying notes nobody puts on the box, tied to EPA and CPSC guidance. The testing guide covers which tests your home needs.
Air
Radon monitors & test kits
Lab-analyzed kits and digital monitors for the test EPA says every home should have.
Long-term alpha-track test kit · Airthings Corentium Home 2 · Ecosense RadonEye
See the picks →
Air
Indoor air quality monitors
PM2.5, CO₂ and humidity readings for the air you breathe at home, smoke days included.
Airthings View Plus · Aranet4 Home · Amazon Smart Air Quality Monitor
See the picks →
Air
Air purifiers (HEPA)
True-HEPA units sized to the room: a practical defense on smoke days and during dusty projects.
Coway AP-1512HH Mighty · Winix 5500-2 · Levoit Core 600S
See the picks →
Air
Carbon monoxide alarms
UL 2034-listed alarms for every level and outside sleeping areas, as CPSC recommends. Many states require them.
First Alert CO615 · Kidde Nighthawk (digital display) · First Alert combination smoke + CO
See the picks →
Water & moisture
Dehumidifiers & hygrometers
Measure first with an inexpensive hygrometer, then dry out a damp basement. EPA's target: under 60% humidity, ideally 30–50%.
Govee hygrometer (2-pack) · Midea Cube (35–50 pint) · hOmeLabs 50-pint
See the picks →
Water & moisture
Water test kits
Lab panels and screening strips for private wells and older plumbing. EPA says to test a private well every year.
Tap Score mail-in lab panel · Health Metric well water kit · Safe Home lead-in-water test
See the picks →
How these lists are made
Picks are widely sold models and kit types that cover each job, chosen on features, running costs and the US guidance they help you follow. Where a price appears, it is the maker's US list price, checked October 12, 2026; we left prices off where we couldn't confirm one. Measurement comes first: every category links to the testing guide page that tells you whether you need it at all, and a certified auditor can tell you which matter most in your home.
Some links here are affiliate links — as an Amazon Associate, AuditYourHome earns from qualifying purchases, at no extra cost to you. Picks are chosen on merit; no manufacturer pays for placement, and prices shown are planning bands, not quotes.