Window Condensation Risk Planner

Compare idealized dew-point margins at window surfaces while keeping uncertainty visible.

Idealized equilibrium only: a surface is flagged when its entered or estimated temperature is at or below the calculated dew point. Actual local humidity, airflow, curtains, thermal bridges, weather, and sensor error vary. This is not a mold or building diagnosis and makes no remediation claim. Inspect real conditions and use qualified help where appropriate.

Room conditions and assumptions

Room / scenario name

Temperature unit

Indoor air temperature

Indoor relative humidity (%)

Outdoor temperature (for estimates)

Temperature uncertainty (±)

RH uncertainty (± points)

Near-dew-point warning band (±)

Pressure assumption

Pressure

Pressure unit

Elevation

Elevation unit

Station pressure is recorded for scenario context; this RH-based Magnus dew-point calculation does not use total pressure. Elevation mode estimates station pressure with a standard atmosphere.

Surface temperatures

Surface input method

Glazing center temperature

Glazing edge temperature

Frame temperature

Center factor (0 outdoor, 1 indoor)

Edge factor

Frame factor

Factor mode linearly interpolates between entered outdoor (factor 0) and indoor (factor 1) temperatures; it is not a glazing-performance model. Temperature uncertainty is applied independently to air/dew point and each surface.

Import JSON or report CSV

Idealized surface comparison

Surface	Source temperature	Margin (surface − dew point)	Uncertainty margin range	Nominal critical indoor RH at surface	Idealized flag

Critical RH above 100% is not reachable below saturation under this idealized equation. It is a nominal threshold, not a safety or mold limit.

Scenario comparison (maximum 8)

Scenario	Indoor	RH	Dew point	Lowest margin	Flagged surfaces