About Home Moisture Lab

Home Moisture Lab is an independent educational tool for comparing indoor humidity, dew point and cold-surface conditions across multiple rooms. The calculator runs in the browser and is designed to make building-physics relationships visible rather than turn one humidity number into a diagnosis.

What makes the tool different

It treats a home as several different microclimates. A bedroom, basement and bathroom can have different temperatures, vapor levels and cold surfaces at the same time. The whole-home view helps identify which room deserves a closer measurement first.

Calculation details and limitations are published on the methodology page.