1. What is a Mini Split Square Footage Calculator?

Definition: This calculator estimates the required cooling/heating power (in BTU/h) for a mini-split system based on room area and BTU factor.

Purpose: It helps homeowners and HVAC professionals determine the appropriate mini-split system size for a given space.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Required power (BTU/h)
• \( A \) — Area (square feet, ft²)
• \( k \) — BTU per square foot factor (typically 20-30 BTU/ft²)

Explanation: The area is multiplied by a factor that accounts for cooling/heating needs per square foot.

3. Importance of Proper Sizing

Details: Correct sizing ensures energy efficiency, proper temperature control, and system longevity. Oversized units short-cycle, while undersized units run continuously.

4. Using the Calculator

Tips: Enter the room area in square feet and select an appropriate BTU factor (default 25 BTU/ft²). The factor should be between 20-30 based on insulation and climate.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect the BTU requirement?
A: Insulation quality, ceiling height, window area, climate zone, and room usage all impact BTU needs.

Q2: When should I use a higher BTU factor?
A: Use higher factors (25-30) for rooms with poor insulation, large windows, or in hot climates.

Q3: What if my room has high ceilings?
A: For ceilings over 8 feet, multiply the area by (ceiling height ÷ 8) before using the calculator.

Q4: How do I convert BTUs to tons?
A: 12,000 BTU/h = 1 ton of cooling. Divide the result by 12,000 to get tons.

Q5: Does this account for heating needs?
A: This provides a baseline. Heating in cold climates may require additional capacity.