1. What is the Ducted AC Size Calculation?

The ducted AC size calculation estimates the required cooling capacity (in tons) for a space based on its area. Proper sizing is crucial for efficiency, comfort, and system longevity.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Area \) — The area to be cooled in square feet
• 25 — BTU per square foot (standard value for moderate climates)
• 12000 — Conversion factor (1 ton = 12,000 BTU/hour)

Explanation: The formula calculates the required cooling capacity by multiplying the area by a standard BTU per square foot value, then converts to tons.

3. Importance of Proper AC Sizing

Details: Correct AC sizing prevents short cycling (oversized units), inadequate cooling (undersized units), and reduces energy costs while improving comfort and air quality.

4. Using the Calculator

Tips: Enter the total area to be cooled in square feet. For accurate results, measure the actual space rather than using home square footage which includes walls.

5. Frequently Asked Questions (FAQ)

Q1: What if my climate is very hot or very cold?
A: The 25 BTU/sq ft factor works for moderate climates. Use 30-35 for hot climates, 20 for mild climates, or consult an HVAC professional.

Q2: What other factors affect AC sizing?
A: Ceiling height, insulation, window size/direction, occupancy, appliances, and local climate all impact requirements.

Q3: What's the danger of an oversized AC unit?
A: Oversized units cool too quickly without proper dehumidification, leading to clammy air and increased energy costs from frequent cycling.

Q4: How accurate is this calculation?
A: This provides a rough estimate. For precise sizing, consult an HVAC professional who can perform a Manual J calculation.

Q5: What about heat pumps?
A: Heat pumps use the same sizing principles but require additional considerations for heating capacity in colder climates.