1. What is an AC BTU per Square Foot Calculator?

Definition: This calculator estimates the cooling capacity needed for a room based on its area and BTU requirements per square foot.

Purpose: It helps homeowners and HVAC professionals determine the appropriate air conditioner size for a given space.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Cooling load (BTU/h)
• \( A \) — Room area (square feet)
• \( \text{BTU/ft}^2 \) — Cooling factor (BTU per hour per square foot)

Explanation: The room area is multiplied by a standard cooling factor to determine the required air conditioner capacity.

3. Importance of Proper AC Sizing

Details: Correct BTU calculation ensures efficient cooling, proper humidity control, energy savings, and prevents system overwork.

4. Using the Calculator

Tips: Enter the room area in square feet and BTU factor (default 20 BTU/h·ft² for residential spaces). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU factor for different rooms?
A: Standard is 20 BTU/h·ft², but use 25-30 for sunny rooms, 30-35 for kitchens, and 35-40 for server rooms.

Q2: How does ceiling height affect the calculation?
A: For ceilings over 8 feet, multiply the result by (ceiling height ÷ 8) for more accurate sizing.

Q3: Should I round up the BTU result?
A: Yes, choose the next available standard AC unit size (5,000 BTU increments typically).

Q4: What other factors should I consider?
A: Account for insulation quality, window size/direction, occupancy, and heat-producing appliances.

Q5: How many square feet does a 12,000 BTU AC cover?
A: At 20 BTU/h·ft², about 600 ft². But adjust based on your specific conditions.