1. What is BTU in Heat Pumps?

BTU (British Thermal Unit) measures heating/cooling capacity. One BTU represents the energy needed to raise 1 pound of water by 1°F. Heat pumps are typically rated in tons (1 ton = 12,000 BTU/hr).

2. How Does the Conversion Work?

The conversion formula is simple:

Example: A 3-ton heat pump has a capacity of 3 × 12,000 = 36,000 BTU/hr

3. Importance of Correct Sizing

Details: Proper sizing is critical for efficiency and performance. Oversized units short cycle, while undersized units can't maintain temperature.

4. Using the Calculator

Tips: Enter heat pump size in tons (common residential sizes range from 1.5 to 5 tons). The default value shows the calculation for a 3-ton unit.

5. Frequently Asked Questions (FAQ)

Q1: Is 3-ton heat pump right for my home?
A: Depends on climate, insulation, and square footage. A professional Manual J calculation is recommended for accurate sizing.

Q2: What's the average BTU for homes?
A: Typical homes need 20-60 BTU per sq.ft. A 3-ton (36,000 BTU) unit typically serves 1,200-1,800 sq.ft. in moderate climates.

Q3: How does SEER rating affect BTU?
A: SEER measures efficiency, not capacity. A 3-ton unit is always 36,000 BTU regardless of SEER, but higher SEER means lower energy use.

Q4: Can I convert BTU back to tons?
A: Yes, divide BTU by 12,000 (e.g., 36,000 BTU ÷ 12,000 = 3 tons).

Q5: What about heat pumps with variable capacity?
A: Variable-speed units list both maximum and minimum BTU outputs, but the tonnage still refers to the maximum capacity.