1. What is this Calculator?

This calculator determines the square footage that can be effectively cooled by an air conditioning unit based on its BTU/h (British Thermal Units per hour) rating. It helps in selecting the right size AC unit for your space.

2. How Does the Calculation Work?

The calculator uses the basic formula:

Where:

• \( BTU/h \) — British Thermal Units per hour (cooling capacity)
• 20 — Standard conversion factor (BTU/h per square foot)

Explanation: The calculation estimates that approximately 20 BTU/h are needed to cool each square foot of space.

3. Importance of Proper Sizing

Details: Properly sizing your AC unit is crucial for energy efficiency and comfort. An undersized unit won't cool effectively, while an oversized unit will cycle on/off too frequently.

4. Using the Calculator

Tips: Enter the BTU/h rating of your AC unit to calculate the approximate square footage it can effectively cool. For more precise calculations, consider factors like insulation, ceiling height, and climate.

5. Frequently Asked Questions (FAQ)

Q1: What if my room has high ceilings?
A: For ceilings over 8 feet, add 10% more BTU/h for each additional foot of ceiling height.

Q2: Does this work for all climates?
A: This is a general estimate. Hotter climates may require 25-30 BTU/h per square foot.

Q3: What about rooms with lots of windows?
A: Add 10% more BTU/h if the room is very sunny, or subtract 10% if heavily shaded.

Q4: How does insulation affect this?
A: Poor insulation may require up to 30% more BTU/h, while excellent insulation may need less.

Q5: Is this calculation for central AC or window units?
A: The principle applies to both, but central systems should be professionally sized.