Choosing the right chiller size is one of the most important decisions for efficient and cost-effective cooling.
Key Factors That Determine Chiller Size
- Floor Area: Total covered area in sq. ft.
- Ceiling Height: Volume of air to cool
- Internal Load: Machines, lighting, human occupancy
- Ambient Temperature: Outdoor heat adds to internal load
Basic Calculation Formula:
To get an approximate tonnage:
TR = (Area in sq ft × Height in ft × Load Factor) ÷ 12,000
Load Factor ranges from 1.2–1.6 depending on activity level (e.g., server rooms need higher cooling).
Air-Cooled vs. Water-Cooled Chillers:
- Air-Cooled: Easier to install, suitable for most rental needs
- Water-Cooled: Higher efficiency, suited for long-term installations
If you’re still unsure, Astro Airtech offers free site assessments and custom tonnage recommendations for your cooling project.