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 per hour. Proper sizing is crucial for efficiency and comfort.

2. How Does the Calculator Work?

The calculator uses the standard rule of thumb formula:

Where:

• \( Tons \) — Required cooling capacity in tons
• \( Area \) — Total area to be cooled in square feet

Explanation: This formula estimates that one ton of cooling capacity is needed for every 600 square feet of living space.

3. Importance of Proper HVAC 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: 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: Is 600 sq ft per ton always accurate?
A: This is a general rule. Actual needs vary based on insulation, climate, windows, and other factors.

Q2: What if my home is well insulated?
A: Well-insulated homes may need less tonnage (up to 800 sq ft per ton), while poorly insulated homes may need more (400-500 sq ft per ton).

Q3: Should I round up or down?
A: HVAC systems come in standard sizes (1.5, 2, 2.5, 3, etc. tons). Choose the nearest standard size, possibly rounding down for energy efficiency.

Q4: What about multi-story homes?
A: Calculate each floor separately, as upper floors often require more cooling than ground floors.

Q5: When should I get a professional Manual J calculation?
A: For new construction, major renovations, or if you have unique circumstances (high ceilings, lots of windows, etc.).