1. What is BTU/h in Air Conditioning?

BTU/h (British Thermal Units per hour) is the standard measurement of cooling capacity for air conditioning systems. It represents the amount of heat an AC unit can remove from a space per hour.

2. How Does the Calculator Work?

The calculator uses the basic cooling load formula:

Where:

• \( BTU/h \) — Cooling capacity needed
• \( Area \) — Area of the space in square feet
• \( 25 \) — Standard multiplier for moderate climates (adjustable for different conditions)

Explanation: This provides a basic estimate of cooling needs. More detailed calculations would consider insulation, windows, occupancy, and other factors.

3. Importance of Proper Load Calculation

Details: Accurate load calculation ensures proper AC sizing, which affects efficiency, comfort, equipment lifespan, and energy costs. Oversized units cycle too frequently, while undersized units can't maintain temperature.

4. Using the Calculator

Tips: Enter the area in square feet. For more precise results, consider additional factors like ceiling height, insulation quality, window size/direction, and local climate.

5. Frequently Asked Questions (FAQ)

Q1: Is 25 BTU/sq ft always accurate?
A: This is a general estimate. Hot climates may need 30-35 BTU/sq ft, while cooler areas may need only 20 BTU/sq ft.

Q2: What other factors affect cooling load?
A: Windows, insulation, ceiling height, number of occupants, appliances, sunlight exposure, and local climate all impact cooling needs.

Q3: How does this relate to AC tonnage?
A: 12,000 BTU/h equals 1 ton of cooling capacity. Our calculator helps determine the needed tonnage.

Q4: Should I round up the calculated BTU?
A: It's generally recommended to choose the next available standard size, but avoid significantly oversizing.

Q5: When should I use professional load calculation?
A: For whole-house systems or complex spaces, professional Manual J calculations are recommended.