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 home or building.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Area \) — Square footage of the space to be cooled
• \( Regional\ Factor \) — BTU per square foot based on climate
• \( 12000 \) — Conversion factor (BTU to tons)

Explanation: The calculation accounts for both the size of your space and the climate conditions in your region.

3. Importance of Proper Sizing

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: Measure your space accurately. For multi-story homes, calculate each floor separately. Include zip code for more precise regional factors.

5. Frequently Asked Questions (FAQ)

Q1: What if my home has high ceilings?
A: Add 10-20% to your calculated tonnage for ceilings over 8 feet tall.

Q2: How does insulation affect the calculation?
A: Well-insulated homes may need less tonnage, while poorly insulated ones may need more.

Q3: Should I round up or down?
A: HVAC systems come in standard sizes (1.5, 2, 2.5, etc. tons). Choose the nearest size, slightly larger if between sizes.

Q4: What about windows and sun exposure?
A: South-facing windows or large glass areas may increase your cooling needs by 10-15%.

Q5: Is this calculation sufficient for new construction?
A: For new construction, a Manual J calculation by an HVAC professional is recommended.