Verify the inputs
Measure or document each input. If a value is only an estimate, record its source and test a conservative alternative.
Insulation/ CALCULATOR
Dew point & surface margin
Compare an indoor surface temperature with the estimated dew point.
FROM ESTIMATE TO ACTION
Use the result, not just the number.
Keep the calculation traceable
Save the input link or copied result together with the date, units and assumptions. A number without its inputs cannot be checked later.
Confirm the decision
Compare the estimate with the related guide, current product data and requirements that apply at your location before buying or building.
Inputs to verify
- Indoor air temperature (°C)
- For ordinary indoor conditions; not a frost-point calculation.
- Relative humidity (%)
- Use a humidity measurement from the same room and time.
- Measured surface temperature (°C)
- Consider measurement error, especially on reflective surfaces.