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 (British Thermal Units) per hour. This measurement originated from the amount of heat needed to melt one ton of ice in 24 hours.

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
• 12000 — Conversion factor (1 ton = 12,000 BTU/h)

Explanation: This calculation converts BTU/h (a measure of heat removal) into tons (a standard unit for air conditioner sizing).

3. Importance of Proper Tonnage Calculation

Details: Correct HVAC sizing is crucial for energy efficiency, comfort, and system longevity. Undersized units struggle to cool, while oversized units short-cycle, reducing efficiency and humidity control.

4. Using the Calculator

Tips: Enter the total BTU/h rating from your HVAC equipment or load calculation. The calculator will convert it to tons, which is the standard sizing measurement used by HVAC professionals.

5. Frequently Asked Questions (FAQ)

Q1: How many square feet will 1 ton cool?
A: Approximately 400-600 sq ft in moderate climates, but this varies based on insulation, climate, and other factors.

Q2: What's the difference between BTU and tons?
A: Tons are simply a larger unit (1 ton = 12,000 BTU/h) used for convenience in sizing HVAC equipment.

Q3: Can I size my AC just using this calculation?
A: This provides basic conversion, but proper Manual J load calculation should be performed for accurate sizing.

Q4: What's a typical residential AC size?
A: Most homes use 1.5-5 ton systems, with average around 3 tons for a 2,000 sq ft home.

Q5: Why is proper sizing important?
A: Proper sizing ensures optimal efficiency (lower energy bills), better humidity control, and longer equipment life.