Five-minute guide

Should I measure before I buy?

Track a pattern

Place the monitor away from supply registers, exterior doors, direct sunlight, and kitchens or bathrooms unless that location is the specific concern. Review at least several days rather than reacting to one number.

Write down context

Note outdoor weather, showering, cooking, windows opening, fan runtime, and when discomfort occurs. The pattern is often more useful than a single “air-quality score.”

Act on causes

Measurements can point toward ventilation, moisture control, filtration, or a need for professional evaluation. A monitor is a decision aid, not a treatment.

Comfort Check currently receives no compensation for this guidance.