Worked examples

Common HVAC design problems solved from start to finish on the psychrometric chart. Every number is computed with this site's engine, and each example links to the calculator with the same inputs. A new example is added every week.

  1. Summer cooling coil selection: mixed air, coil leaving air, and whether you need reheat

    Two zones, the same 20 kW load: the SHF 0.80 office needs no reheat, the SHF 0.70 meeting room needs 3.23 kW. Mixed point, supply point, ADP and coil load step by step for 32 °C / 60 % outdoor air, a 26 °C / 50 % room and 30 % outdoor air.

Last updated 2026-10-22.