1. What is HVAC Tonnage Calculation?

Definition: This calculator converts cooling capacity in BTU/hr to HVAC tonnage, where 1 ton of cooling equals 12,000 BTU/hr.

Purpose: It helps HVAC professionals and homeowners determine the appropriate size of air conditioning units for spaces.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — HVAC tonnage (tons)
• \( BTU \) — Cooling capacity (BTU per hour)

Explanation: The cooling capacity in BTU/hr is divided by 12,000 to convert to tons of cooling capacity.

3. Importance of Proper Tonnage Calculation

Details: Correct tonnage ensures energy efficiency, proper cooling, and prevents system strain. Oversized units short-cycle while undersized units run continuously.

4. Using the Calculator

Tips: Enter the cooling capacity in BTU/hr (found on AC unit specifications or calculated from room size). Value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 12,000 BTU per ton?
A: This standard comes from the amount of heat needed to melt one ton of ice in 24 hours (288,000 BTU/24hr = 12,000 BTU/hr).

Q2: How do I find my cooling capacity in BTU?
A: You can use our BTU Calculator or multiply room square footage by 20-25 BTU/sq ft (varies by climate and insulation).

Q3: What's a typical tonnage for homes?
A: Average homes need 1-5 tons (12,000-60,000 BTU), with 1 ton per 400-600 sq ft depending on factors.

Q4: Should I round up the calculated tonnage?
A: HVAC units come in standard sizes (1.5, 2, 2.5, etc. tons). Round to nearest standard size, considering local climate factors.

Q5: Does this account for heat load factors?
A: No, this is a basic conversion. For precise sizing, consult an HVAC professional who considers insulation, windows, occupancy, etc.