R-Value Estimator

Estimate wall/ceiling R-value using HVAC data and temperature measurements where internal construction is unknown.

1. Temperatures & HVAC

Indoor Air Temp (°F)

Outdoor Air Temp (°F)

HVAC Load (BTU/hr)

HVAC Mode

Component Type

Target Area (sq ft)

Indoor Surface Temp (°F)

Outdoor Surface Temp (°F)

Space Length (ft)

Space Width (ft)

Space Height (ft)

Air Change Rate (ACH)

Window Area (sq ft)

Other Walls/Ceilings (sq ft)

Floor Area (sq ft)

Values are automatically saved to your browser.