Thermal indoor plan

This app turns six measurements into the number that actually describes how a room will feel. Every modern comfort standard still comes back to Fanger's predicted mean vote: a seven-point scale running from cold to hot. This app implements the full ISO 7730 heat-balance model. Air temperature, mean radiant temperature, air speed, humidity, activity and clothing are resolved together into PMV and into the share of occupants predicted to be dissatisfied — with the clothing surface temperature solved iteratively from the body's own heat balance rather than approximated away. Lab is the workbench. Move any input — air speed, metabolic rate, a different garment from the ISO 9920 catalogue — and PMV, PPD, the operative temperature and all six terms of your personal heat budget update together. Seek runs the model backwards. Rather than asking how a space feels, ask what it needs: This app…