1. What is an AC and Furnace Sizing Calculator?

Definition: This calculator estimates the appropriate size for air conditioning (in tons) and furnace (in BTU/h) based on your home's square footage.

Purpose: Helps homeowners and HVAC professionals determine the right capacity HVAC equipment needed for efficient heating and cooling.

2. How Does the Calculator Work?

The calculator uses two standard formulas:

Where:

• \( AC\ Tons \) — Air conditioning capacity in tons (1 ton = 12,000 BTU/h)
• \( Furnace\ BTU \) — Heating capacity in British Thermal Units per hour
• \( Sq\ Ft \) — Total area of the home in square feet

Explanation: These are basic rules of thumb that provide a starting point for HVAC sizing.

3. Importance of Proper HVAC Sizing

Details: Correctly sized HVAC systems operate more efficiently, last longer, and provide better comfort. Oversized units short-cycle, while undersized units run constantly.

4. Using the Calculator

Tips: Enter your home's total square footage (excluding garage). The calculator provides basic estimates - consult an HVAC professional for exact sizing.

5. Frequently Asked Questions (FAQ)

Q1: Are these calculations accurate for all homes?
A: These are general estimates. Actual needs vary based on climate, insulation, windows, and other factors.

Q2: What if my home is very well insulated?
A: Well-insulated homes may need slightly smaller units. Consider reducing results by 10-15%.

Q3: What about homes with high ceilings?
A: For ceilings over 8 feet, multiply your square footage by 1.25 before using the calculator.

Q4: Why is proper sizing important?
A: Proper sizing ensures energy efficiency, comfort, and system longevity. Oversized ACs don't dehumidify well.

Q5: Should I round up the results?
A: HVAC systems come in standard sizes. Round to the nearest half-ton for AC and nearest 10,000 BTU for furnaces.