Heat Load Calculator
ISHRAE-standard cooling load estimation. Adjust your parameters — results update in real time.
Estimated load
26.9TR
Power
94.7 kW
What kind of space?
Select the type that best matches — this sets default load assumptions.
Where is this located?
Peak summer design temperature used for outdoor conditions.
Room dimensions
Enter the footprint of the conditioned space.
Total conditioned area
300 m²(3,229 sq ft)
Volume
1,050 m³
Building envelope
Construction details determine heat transfer through walls, roof, and glass.
Primary window orientation
Which direction do the largest windows face?
People & equipment
Defaults are based on your Office selection. Override if needed.
Sensible / person
75 W
Latent / person
55 W
Fresh air / person
20 CFM
Safety factor
Industry standard is 10%
Estimated Cooling Load
26.9TR
323.0k BTU/hr · 94.7 kW
Floor area
300 m²
Efficiency
120 sqft/TR
Outdoor
43°C
Load Distribution
Walls, roof, glass
People, lights, equipment
+ 10% safety
Detailed Breakdown
System Recommendation
VRF or ducted central system — professional design study recommended for optimal sizing.
Need a detailed load study?
Free site assessment by our engineers — no obligation.
Based on ISHRAE CLTD/SCL/CLF method. Peak summer design conditions. For precise sizing, a professional site survey is recommended.