Cooling load calculation estimates the amount of heat that must be removed from a room to maintain comfortable indoor temperature. This load determines the required air conditioner capacity.
Area Load = Area × 60 BTU/hr
People Load = Number of People × 600 BTU/hr
Glass Load = Glass Area × 150 BTU/hr
Total Cooling Load = Area Load + People Load + Glass Load
Required AC Capacity (TR) = Total BTU ÷ 12,000
Room Area = 250 sq.ft
People = 4
Glass Area = 20 sq.ft
Estimated Cooling Load ≈ 18,000 BTU/hr Recommended AC Capacity ≈ 1.5 TR
Cooling load is the amount of heat that must be removed from a room to maintain comfortable indoor temperature.
Typically 50–70 BTU per square foot is used for quick HVAC cooling load estimation.
TR (Ton of Refrigeration) is a unit of cooling capacity where 1 TR equals 12,000 BTU per hour.
Proper load calculation ensures correct AC sizing, better energy efficiency and longer equipment life.