Measure before you buy
Govee hygrometer (2-pack)
Bluetooth-logging thermo-hygrometers, about $15–$25 each and sold in pairs — one upstairs, one in the basement, and a week of data tells you whether you need a dehumidifier at all.
Gear guide · Water & moisture · updated October 2, 2026
Dehumidifiers & hygrometers
Half of Ontario's musty-basement problem is seasonal: warm humid summer air meeting cool foundation walls. A $15–$25 hygrometer proves whether you have a humidity problem at all; a properly sized dehumidifier fixes the summer half. The winter half — condensation on cold surfaces — is an insulation and ventilation problem the audit diagnoses, and no dehumidifier fixes it.
Not sure this category applies to your home? The 30-second screener flags it if so, and the mold & indoor air guide covers the testing side.
The apartment-to-basement pick
Midea Cube (35–50 pint)
Compact footprint that nests for storage, app control, and a washable filter — sized right for typical basements at the 35-pint mark.
The big-basement standard
hOmeLabs 50-pint
The straightforward high-capacity unit for large or wet basements — pair it with its drain-hose outlet so you never empty a bucket.
Before you buy
- Winter indoor target is roughly 30–50% relative humidity; summer basements drift far above it without help.
- Buy Energy Star and use the drain hose — the bucket is how dehumidifiers end up unplugged by November.
- If humidity is fine but a cold corner still grows mould, that's a cold-surface (insulation) problem — the audit's thermal scan finds it.
- Persistent high humidity in a tightened house is the textbook case for an HRV — ask the planner.
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.
Measure, then act
Gear works best inside a plan: the planner reads your home's era, heating, and symptoms, flags the tests that matter, and puts the right categories on your list.
Also in gear guides: Radon monitors & test kits · Indoor air quality monitors · Air purifiers (HEPA)