Guides

How the numbers work, and which ones lie.

• Why dehumidifier ratings changed in 2019The DOE test moved from 80°F to 65°F. Every old chart is on the wrong scale.
• What size dehumidifier do you needHow the dampness bands are actually judged, and what raises the number.
• Ideal crawl space humidityThe target band, why dew point beats RH, and where to put the sensor.
• Dehumidifier for moldIt prevents growth. It does not remove what is already there.
• Dehumidifier for silverfishHabitat control, not extermination — and how long it actually takes.
• Dehumidifier for musty smellDrying is not deodorising. What it fixes and what it won't.
• Dehumidifier for springtails and centipedesMoisture-indicator insects. Remove the habitat, remove the food chain.
• Condensate pumpsChosen on lift, never on GPH — the rating almost everyone misreads.
• Setting up a continuous drainNever empty a bucket again — gravity, pump, or floor drain.
• What a dehumidifier costs to runWhy an oversized unit is usually cheaper than an undersized one.