1. What is BTU per Square Foot?

Definition: This calculator determines the cooling capacity (in BTUs) required per square foot of space based on total cooling capacity and area.

Purpose: Helps HVAC professionals and homeowners properly size air conditioning units for optimal cooling efficiency.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• BTU/sq ft — Cooling capacity per square foot (BTU/h sq ft)
• Total BTU — Total cooling capacity of the system (BTU/h)
• Area — Area to be cooled (square feet)

Explanation: The total cooling capacity is divided by the area to determine how much cooling power is applied per square foot.

3. Importance of BTU per Square Foot Calculation

Details: Proper calculation ensures efficient cooling, prevents system overload, and helps maintain comfortable temperatures while minimizing energy costs.

4. Using the Calculator

Tips: Enter the total cooling capacity in BTU/h and the area in square feet. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU per square foot for residential cooling?
A: Generally 20-30 BTU per sq ft, but varies based on climate, insulation, and other factors.

Q2: How do I find the total BTU of my AC unit?
A: Check the manufacturer's specifications or model number (often contains the BTU rating).

Q3: When would I need higher BTU per square foot?
A: In hot climates, poorly insulated spaces, rooms with high ceilings, or areas with significant heat-generating equipment.

Q4: Does this include heat load calculations?
A: No, this is a basic calculation. Professional HVAC design includes detailed heat load analysis.

Q5: How does this relate to AC tonnage?
A: 1 ton of cooling = 12,000 BTU/h. You can convert your result to tons per sq ft by dividing by 12,000.