1. What is HVAC Tonnage Calculation?

HVAC tonnage calculation determines the cooling capacity needed for a space based on its square footage. One ton of cooling equals 12,000 BTU per hour.

2. How Does the Calculator Work?

The calculator uses the standard HVAC tonnage formula:

Where:

• \( Area \) — Area of the space in square feet
• 25 — Standard BTU per square foot (may vary by climate)
• 12000 — Conversion factor (1 ton = 12,000 BTU/hour)

Explanation: The formula estimates cooling needs based on 25 BTU per square foot, then converts to tons.

3. Importance of Proper HVAC Sizing

Details: Correct HVAC sizing ensures energy efficiency, proper humidity control, and system longevity. Oversized units short-cycle, while undersized units struggle to maintain temperature.

4. Using the Calculator

Tips: Enter the total area to be cooled in square feet. For more accurate results, consider factors like ceiling height, insulation, and climate.

5. Frequently Asked Questions (FAQ)

Q1: Is 25 BTU/sq ft appropriate for all climates?
A: No, this is a general estimate. Hotter climates may require 30-35 BTU/sq ft, while milder climates may need only 20 BTU/sq ft.

Q2: What other factors affect HVAC sizing?

• Ceiling height
• Insulation quality
• Window size and orientation
• Number of occupants
• Heat-producing appliances

Q3: What's the difference between a 2-ton and 3-ton unit?
A: A 3-ton unit has 50% more cooling capacity (36,000 BTU/hr vs 24,000 BTU/hr) and is suitable for larger spaces.

Q4: Can I use this for commercial spaces?
A: This calculator is designed for residential applications. Commercial spaces require more complex calculations.

Q5: Should I round up the tonnage result?
A: HVAC units come in standard sizes (1.5, 2, 2.5, 3, etc. tons). Round to the nearest standard size, but consult an HVAC professional for precise sizing.