1. What is HVAC Tonnage Calculation?

The HVAC tonnage calculation estimates 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 sizing formula:

Where:

• \( Square Feet \) — Area to be cooled
• \( 25 \) — BTU per square foot (standard value for moderate climates)
• \( 12000 \) — BTU per ton conversion factor

Explanation: The formula calculates the required tonnage by multiplying the square footage by 25 BTU (a standard value for moderate climates) and then converting BTU to tons.

3. Importance of Proper HVAC Sizing

Details: Proper HVAC sizing is crucial for energy efficiency, comfort, and system longevity. An oversized unit will short cycle, while an undersized unit will run constantly.

4. Using the Calculator

Tips: Enter the square footage of the space you need to cool. The calculator provides an estimate based on standard assumptions. For precise calculations, consult an HVAC professional.

5. Frequently Asked Questions (FAQ)

Q1: Is 25 BTU/sq ft appropriate for all climates?
A: No, this is a moderate climate value. Hot climates may need 30-35 BTU/sq ft, while cooler climates may need 20 BTU/sq ft.

Q2: What other factors affect HVAC sizing?
A: Ceiling height, insulation, window area, sun exposure, and occupancy all affect the actual cooling needs.

Q3: What's the typical tonnage for a 1500 sq ft home?
A: About 3 tons (36,000 BTU) for moderate climates, as shown in our default calculation.

Q4: Can I use this for commercial spaces?
A: This calculator is designed for residential estimates. Commercial spaces have different requirements.

Q5: Should I round up the tonnage?
A: HVAC systems come in standard sizes (1.5, 2, 2.5, 3, 3.5, 4, 5 tons). Round to the nearest standard size, but consult a professional.