1. What is HVAC Tonnage?

HVAC tonnage refers to the cooling capacity of an air conditioning system. One ton equals 12,000 BTU per hour. Proper sizing is crucial for efficiency and comfort in your space.

2. How Does the Calculator Work?

The calculator uses the standard tonnage estimation formula:

Where:

• \( Area \) — Area to be cooled in square feet
• \( 25 \) — Standard BTU per square foot (adjustable for climate)
• \( 12000 \) — Conversion factor (BTU to tons)

Explanation: The formula estimates the cooling capacity needed based on the size of the space, with 25 BTU per square foot as a general guideline.

3. Importance of Proper Tonnage

Details: Correct HVAC sizing ensures energy efficiency, proper humidity control, and system longevity. Oversized units short cycle while undersized units run constantly.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between BTU and tons?
A: 1 ton of cooling equals 12,000 BTU per hour. Tonnage is simply a larger unit for measuring cooling capacity.

Q2: Is 25 BTU/sq ft appropriate for all climates?
A: No, this is an average. Hot climates may need 30-35 BTU/sq ft, while cooler climates may need only 20 BTU/sq ft.

Q3: What other factors affect tonnage requirements?
A: Insulation quality, window size/direction, ceiling height, occupancy, and heat-producing appliances all impact cooling needs.

Q4: Should I round up the tonnage result?
A: HVAC systems come in standard sizes (1.5, 2, 2.5, 3, etc. tons). Professional Manual J calculation is recommended for precise sizing.

Q5: What if my home has multiple floors?
A: Calculate each floor separately and sum the results, or consult an HVAC professional for a complete load calculation.