1. What is an HVAC Tonnage Calculator by Region?

Definition: This calculator estimates the required HVAC system tonnage based on cooling capacity (BTU/hr) adjusted for regional climate factors.

Purpose: It helps HVAC professionals and homeowners determine the appropriate AC system size for their climate zone.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Required HVAC tonnage (tons)
• \( BTU \) — Cooling capacity (BTU per hour)
• \( C \) — Climate factor (varies by region)

Explanation: The base calculation converts BTU to tons (1 ton = 12,000 BTU/hr), then adjusts for regional climate conditions.

3. Importance of Proper Tonnage Calculation

Details: Correct sizing ensures energy efficiency, proper humidity control, system longevity, and prevents short-cycling or inadequate cooling.

4. Using the Calculator

Tips: Enter the cooling capacity in BTU/hr and select your climate zone. The calculator will adjust the base calculation for your regional conditions.

5. Frequently Asked Questions (FAQ)

Q1: Why is climate factor important?
A: Hotter/humid climates require more cooling capacity per square foot than moderate climates.

Q2: How do I find my cooling capacity (BTU)?
A: Use Manual J calculations or estimate 20 BTU per sq ft (adjust for insulation, windows, etc.).

Q3: What's the standard conversion without climate factor?
A: 1 ton = 12,000 BTU/hr. The climate factor adjusts this baseline.

Q4: When would I use a lower climate factor?
A: For dry climates where latent heat (humidity) load is lower.

Q5: Does this include heating requirements?
A: No, this calculates cooling tonnage only. Heating requirements are calculated separately.