1. What is an Air Conditioner BTU Calculator?

Definition: This calculator estimates the cooling capacity needed for a room based on its size and various correction factors.

Purpose: It helps homeowners and HVAC professionals determine the appropriate air conditioner size for optimal cooling efficiency.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Cooling capacity (BTU/h)
• \( A \) — Room area (square feet)
• \( BTU/ft^2 \) — Base cooling requirement (typically 20 BTU/h per ft²)
• \( F \) — Correction factor for special conditions

Explanation: The room area is multiplied by a base BTU requirement, then adjusted by factors for sunlight, insulation, and other conditions.

3. Importance of Proper BTU Calculation

Details: Correct sizing prevents energy waste (oversized units) and insufficient cooling (undersized units), saving money and improving comfort.

4. Using the Calculator

Tips: Enter the room area in square feet, base BTU requirement (default 20 BTU/h·ft²), and correction factor (default 1.0). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the standard BTU per square foot?
A: Typically 20 BTU/h per ft², but can range from 18-24 depending on climate.

Q2: When should I adjust the correction factor?
A: Increase for sunny rooms (1.1-1.3), kitchens (1.4), or high ceilings (1.25). Decrease for shaded rooms (0.9) or excellent insulation (0.8).

Q3: How do I measure room area?
A: Multiply length by width. For irregular rooms, divide into rectangles and sum the areas.

Q4: Does this account for multiple occupants?
A: No, add 600 BTU per additional person beyond 2 occupants.

Q5: What about windows and heat sources?
A: Add 1,000 BTU per window and account for major heat sources (appliances, computers) separately.