BTU/h por ambiente
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
This BTU/h room calculator estimates cooling capacity requirements based on space area and number of occupants. The formula uses 600 BTU per square meter plus 600 BTU per person. For example, a 20m² room with 4 people would need 20×600 + 4×600 = 14,400 BTU/h.
This tool is useful for sizing residential or commercial air conditioning systems. The base value (600 BTU/m²) accounts for typical insulation and ventilation conditions. For rooms with large windows or direct sunlight exposure, consider adjusting the final result by up to 20%.
Do not confuse BTU/h with Watts, as BTU is an energy unit. The calculation doesn't account for elements like electronic devices or intense lighting, which may increase actual requirements. Always consult a specialist before installing climate control equipment.
Frequently asked questions
How does the 600 BTU/sq.m + people×600 formula work?
The formula adds 600 BTU for each square meter of the area plus 600 BTU per person expected to occupy the space.
Should I account for high ceilings?
Multiply the floor area by 1.2 to 1.5 for ceilings over 3 meters to compensate for additional volume.
Is the result exact?
It's a basic estimate. For precision, consult an engineer who can assess factors like solar orientation and electronic equipment.
Can I use it for commercial spaces?
Yes, but commercial areas typically require 1000-1500 BTU/sq.m and 1000 BTU/person due to higher occupancy density.