1. What is BTU of Cooling per Square Foot?

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

Purpose: It helps HVAC professionals and homeowners determine the appropriate cooling capacity for air conditioning systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Cooling capacity (BTU/h)
• \( A \) — Area to be cooled (square feet)
• \( \text{BTU/ft}^2 \) — Cooling requirement per square foot (BTU/h·ft²)

Explanation: The area is multiplied by the cooling requirement per square foot to determine the total cooling capacity needed.

3. Importance of Cooling Calculation

Details: Proper cooling capacity estimation ensures efficient air conditioning, proper temperature control, and energy savings.

4. Using the Calculator

Tips: Enter the area in square feet and cooling requirement (default 20 BTU/h·ft²). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU per square foot value?
A: Most residential spaces require 20 BTU/h per square foot, but this can vary based on climate, insulation, and other factors.

Q2: When would I use a different BTU/ft² value?
A: Use higher values (25-30) for sunny rooms, kitchens, or hot climates. Use lower values (15-18) for shaded areas or cooler climates.

Q3: Does this include heat from occupants or appliances?
A: The standard values account for normal conditions. Add additional capacity for high occupancy or heat-producing equipment.

Q4: How do I measure the area accurately?
A: Measure length × width for rectangular rooms. For irregular shapes, divide into rectangular sections and sum the areas.

Q5: Is this calculation sufficient for whole-house AC sizing?
A: This provides a basic estimate. Professional Manual J calculations consider more factors for precise sizing.