HVAC Cooling & Power Unit Conversion (TR, kW, HP, BTU, CFM)
HVAC system design commonly involves multiple units such as cooling tons (TR), refrigeration tonnage, kW, HP, BTU/hr and CFM, depending on system type and user discipline.
This page provides a single, consistent conversion reference and calculator for:
VRF / VRV systems
Non-VRF split and packaged air-conditioners
Air-cooled and water-cooled chillers
Central HVAC systems
The calculator supports early design, BOQ preparation, and coordination between mechanical and electrical teams.
Common HVAC Units in Practice
Category
Units Used
Cooling capacity
TR, kW (cooling), BTU/hr
Mechanical reference
HP
Airflow
CFM
Electrical input
kW, HP
Standard Engineering Conversion Reference
Parameter
Value
1 TR
3.517 kW (cooling)
1 TR
12,000 BTU/hr
1 kW (cooling)
0.284 TR
1 HP
0.746 kW (electrical)
Typical airflow
~400 CFM per TR (comfort AC)
CFM is indicative and varies with application, ceiling height and ventilation strategy.
