1. What is a Square Footage Calculator for Air Conditioner?

Definition: This calculator estimates the cooling capacity needed for an air conditioner based on room area, BTU requirements per square foot, and adjustment 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)
• \( BTU/ft^2 \) — Cooling requirement per square foot
• \( F \) — Adjustment factor for special conditions

Explanation: The room area is multiplied by the base BTU requirement, then adjusted for factors like sunlight exposure, insulation, and room usage.

3. Importance of Proper BTU Calculation

Details: Correct sizing ensures energy efficiency, proper humidity control, and prevents short-cycling of the AC unit.

4. Using the Calculator

Tips: Enter the room area in square feet, BTU per square foot (default 20 BTU/h·ft²), and adjustment 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 square foot, but can range from 18-24 depending on climate.

Q2: When should I adjust the factor?
A: Increase factor for sunny rooms (1.1), kitchens (1.2), or poor insulation (1.3). Decrease for shaded rooms (0.9).

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

Q4: What about room height?
A: For ceilings over 8 feet, add 10% BTU per additional foot. Our calculator assumes standard 8-foot ceilings.

Q5: Does this include heat load from people/appliances?
A: No, add 600 BTU per person and account for major heat-producing appliances separately.