1. What is an AC Room Size Calculator?

Definition: This calculator estimates the required air conditioning tonnage based on room area and cooling factor.

Purpose: It helps homeowners and HVAC professionals determine the appropriate AC unit size for efficient cooling.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — AC tonnage (tons)
• \( A \) — Room area (square feet)
• \( F \) — Cooling factor (square feet per ton)

Explanation: The room area is divided by the cooling factor to determine the required cooling capacity in tons.

3. Importance of Proper AC Sizing

Details: Correct AC sizing ensures energy efficiency, proper humidity control, and prevents system overwork or underperformance.

4. Using the Calculator

Tips: Enter the room area in square feet and cooling factor (default 400 ft²/ton for residential spaces). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical cooling factor for homes?
A: For residential spaces, 400 ft² per ton is standard, but this varies by climate (300-500 ft²/ton).

Q2: When should I use a different factor?
A: Use lower factors (300-350) for hot climates, high ceilings, or sun-exposed rooms. Higher factors (450-500) for cooler climates.

Q3: Does this include heat load calculations?
A: This is a basic estimate. For precise sizing, consider windows, insulation, occupancy, and appliances.

Q4: What if my result is between standard AC sizes?
A: Round up to the nearest half-ton (e.g., 2.3 tons → 2.5 ton unit) for better performance.

Q5: How do I measure my room area?
A: Multiply length by width of the space. For multiple rooms, calculate each separately and sum the areas.