1. What is an HVAC Tonnage Calculator?

Definition: This calculator converts cooling capacity in BTU/hr to HVAC system tonnage.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: One ton of cooling equals 12,000 BTU per hour. The formula converts BTU rating to standard tons.

3. Importance of Proper Tonnage Calculation

Details: Correct tonnage ensures efficient operation, proper cooling, and prevents system overwork or short cycling.

4. Using the Calculator

Tips: Enter the cooling capacity in BTU/hr (found on equipment specifications). The 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/24h = 12,000 BTU/h).

Q2: What's a typical tonnage for residential AC?
A: Most homes need 1-5 tons (12,000-60,000 BTU), depending on square footage and climate.

Q3: How do I find my system's BTU rating?
A: Check the model number or nameplate on your outdoor condenser unit.

Q4: Does this account for SEER ratings?
A: No, this is a simple conversion. SEER affects efficiency, not capacity measurement.

Q5: Can I use this for heat pumps?
A: Yes, for cooling capacity. Heating capacity may differ.