Calculator
How many tons does your project need?
A preliminary estimate based on the main heat-load factors.
Calculation assumptions
- Design load density by facility type (140–260 W/m²).
- Ceiling factor: +10% per metre above 3 m (min 0.9).
- Regional climate factor (0.85–1.15).
- Sun and glazing factors: low / medium / high.
- 150 W per occupant plus equipment load in kW.
- 10% safety margin. 1 TR = 3,517 W = 12,000 BTU/h.