Thermal Comfort PMV / PPD Analyzer
Estimate thermal sensation and predicted dissatisfaction from comfort assumptions.
Method and limits
PMV and PPD use the ISO 7730 Annex D clothing-temperature iteration with external work set to zero. Verify ASHRAE 55 or ISO 7730, adaptive comfort and local discomfort before final design. No edition is pinned and this page does not claim compliance.
Formulas, source and scope
Metabolic rate is met × 58.15 W/m² and clothing insulation is clo × 0.155 m²·K/W. External work is not an input and is zero. Clothing temperature is solved with the ISO 7730 Annex D iteration, then PMV and PPD use that program’s heat-balance expressions. Run the on-page inputs to reproduce a number. This page does not certify a code edition.
Formula source: ISO 7730 Annex D iterative clothing temperature, as implemented in this repository. ASHRAE 55 and ISO 7730 are documents to check before design. No edition year is pinned and no compliance is certified.
FAQ
Does a PMV on this page certify ASHRAE 55?
No. The page does not claim compliance with a numbered edition.
How do I reproduce the screen?
The default inputs are 24 °C, 24 °C, 50%, 0.1 m/s, 1.2 met and 0.5 clo. Calculate and use the engine output. Do not replace it with an off-page textbook value.