1. What is a BTU Calculator for Cooling?

Definition: This calculator estimates the cooling capacity needed for a space based on its area and additional heat gains.

Purpose: It helps HVAC professionals and homeowners determine the appropriate air conditioning capacity for a room or building.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( BTU \) — Cooling capacity required (BTU/hour)
• \( Area \) — Room area (square feet)
• \( Gains \) — Additional heat gains from appliances, people, etc. (BTU/hour)

Explanation: The base cooling requirement is 25 BTU per square foot, with additional capacity added for heat sources.

3. Importance of Proper BTU Calculation

Details: Correct BTU estimation ensures efficient cooling, proper equipment sizing, energy savings, and comfort.

4. Using the Calculator

Tips: Enter the room area in square feet and any additional heat gains in BTU/hour. Area must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 25 BTU per square foot?
A: This is a standard rule-of-thumb for residential cooling in moderate climates. Adjust up for hot climates or poor insulation.

Q2: What counts as heat gains?
A: Appliances (300-1000 BTU/h each), people (400 BTU/h each), windows (1000 BTU/h each for sunny exposures), lighting, etc.

Q3: When would I need a different base value than 25?
A: Use 30 for hot climates, 35 for very hot/sunny areas, or 20 for well-insulated spaces in cool climates.

Q4: How do I convert BTU to tons?
A: 12,000 BTU = 1 ton of cooling. Our calculator shows BTU which can be converted to tons for AC unit selection.

Q5: Does this include humidity control?
A: No, this is for sensible cooling only. Humid climates may need additional capacity for latent heat removal.