Ducted AC Size Calculator

Ducted AC Size Equation:

\[ Ton = \frac{(Square Feet \times BTU per sq ft)}{12000} \]

Ton (refrigeration tons):

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1. What is the Ducted AC Size Equation?

The Ducted AC Size Equation calculates the required air conditioning capacity in refrigeration tons based on the square footage of the space and the BTU (British Thermal Unit) requirement per square foot. This helps determine the appropriate size for a ducted air conditioning system.

2. How Does the Calculator Work?

The calculator uses the Ducted AC Size equation:

\[ Ton = \frac{(Square Feet \times BTU per sq ft)}{12000} \]

Where:

\( Square Feet \) — Total area to be cooled (sq ft)
\( BTU per sq ft \) — Cooling requirement per square foot (BTU/sq ft)
\( 12000 \) — Conversion factor (1 ton of cooling = 12000 BTU/hour)

Explanation: The equation converts the total BTU requirement to refrigeration tons, which is the standard unit for air conditioning capacity.

3. Importance of Proper AC Sizing

Details: Proper AC sizing is crucial for energy efficiency, comfort, and system longevity. An undersized unit will struggle to cool the space, while an oversized unit will short cycle, leading to humidity problems and increased wear.

4. Using the Calculator

Tips: Enter the total square footage of the space and the BTU requirement per square foot. Typical BTU/sq ft values range from 20-30 for well-insulated spaces to 30-40 for spaces with more heat gain.

5. Frequently Asked Questions (FAQ)

Q1: Why is 12000 used in the formula?
A: 12000 BTU/hour equals 1 ton of refrigeration, which is the standard measurement for air conditioning capacity.

Q2: What factors affect BTU per square foot?
A: Climate, insulation quality, window area, ceiling height, number of occupants, and heat-generating appliances all affect the BTU requirement.

Q3: What is considered a well-sized AC system?
A: A properly sized system should maintain comfortable temperature and humidity levels while running in longer cycles rather than frequent short cycles.

Q4: Should I round up the calculated tonnage?
A: It's generally recommended to choose the nearest standard unit size rather than significantly oversizing. Consult with an HVAC professional for precise sizing.

Q5: Can this calculator be used for commercial spaces?
A: While the basic principle applies, commercial spaces often have more complex cooling requirements and should be evaluated by HVAC professionals.