1. What is a Cooling Coil Size Calculator?

Definition: This calculator estimates the required surface area of a cooling coil based on cooling capacity in tons and a sizing factor.

Purpose: It helps HVAC professionals and engineers determine the appropriate coil size for air conditioning and refrigeration systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Cooling coil size (square feet)
• \( T \) — Cooling capacity (tons)
• \( F \) — Factor (square feet per ton)

Explanation: The cooling capacity is multiplied by a standard factor to determine the required coil surface area for proper heat transfer.

3. Importance of Cooling Coil Sizing

Details: Proper coil sizing ensures efficient heat transfer, adequate cooling capacity, and optimal system performance while preventing energy waste.

4. Using the Calculator

Tips: Enter the cooling capacity in tons and the sizing factor (default 2.5 sq ft/ton). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical factor value?
A: Most standard systems use 2.5 sq ft per ton, but this can vary from 1.5 to 3.5 depending on application.

Q2: How do I determine cooling capacity?
A: Calculate based on building heat load or use manufacturer specifications for existing equipment.

Q3: When would I use a different factor?
A: Use lower factors (1.5-2.0) for high-velocity systems, higher factors (3.0-3.5) for low-velocity or specialized applications.

Q4: Does this account for different refrigerants?
A: The basic calculation doesn't, but factor selection should consider refrigerant type and operating conditions.

Q5: Should I add safety margin to the result?
A: Yes, consider adding 10-15% to the calculated size for design safety factors.