1. What is AC Sizing?

AC sizing refers to determining the appropriate cooling capacity (measured in tons) needed for a space based on its heat load (measured in BTU/h). Proper sizing is crucial for efficiency and comfort.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

• 1 Ton = 12,000 BTU/h
• BTU/h — British Thermal Units per hour (heat removal rate)

Explanation: This conversion helps determine how many tons of cooling capacity are needed to handle a given heat load.

3. Importance of Proper AC Sizing

Details: Proper sizing ensures energy efficiency, optimal performance, and prevents short-cycling (oversized units) or inability to cool (undersized units).

4. Using the Calculator

Tips: Enter the total BTU/h requirement for your space. The calculator will convert this to tons of cooling capacity needed.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine my BTU/h requirements?
A: BTU requirements depend on room size, insulation, windows, climate, and heat-generating appliances. A professional load calculation is most accurate.

Q2: What's the typical tonnage for a home?
A: Average homes need 1 ton per 400-600 sq ft, but this varies by climate and home characteristics.

Q3: Is bigger AC always better?
A: No. Oversized ACs cool too quickly without proper dehumidification, leading to comfort and efficiency issues.

Q4: What about SEER ratings?
A: SEER measures efficiency, not capacity. This calculator determines capacity needs regardless of efficiency rating.

Q5: Should I round up the tonnage?
A: It's best to consult an HVAC professional. Modern systems often use variable capacity to match exact needs.