1. What is HVAC Tonnage?

HVAC tonnage refers to the cooling capacity of an air conditioning system. One ton of cooling equals 12,000 BTU/h (British Thermal Units per hour). Proper tonnage calculation is essential for efficient system performance.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Tons \) — Cooling capacity in tons
• \( BTU/h \) — British Thermal Units per hour

Explanation: This conversion allows you to determine the equivalent tonnage of an HVAC system based on its BTU/h rating.

3. Importance of Proper Tonnage Calculation

Details: Correct tonnage is crucial for energy efficiency, proper humidity control, and system longevity. Oversized units short cycle, while undersized units run constantly.

4. Using the Calculator

Tips: Enter the BTU/h rating from your HVAC unit's model number or specification sheet. The calculator will convert it to tons.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my unit's BTU/h rating?
A: Check the model number (often contains BTU/h) or manufacturer's specifications. Common residential units range from 18,000 to 60,000 BTU/h.

Q2: What's the typical tonnage for a house?
A: Average homes need 1 ton per 400-600 sq ft, but this varies by climate, insulation, and other factors.

Q3: Why is 12,000 BTU/h equal to 1 ton?
A: Historically, it represents the cooling power of one ton of ice melting over 24 hours (288,000 BTU/24h = 12,000 BTU/h).

Q4: Can I use this for heat pumps?
A: Yes, heat pump cooling capacity is rated the same way as AC units.

Q5: How precise is this calculation?
A: This gives the nominal tonnage. Actual cooling capacity depends on operating conditions and system efficiency.