1. What is the Watts to BTU/hr Conversion?

The watts to BTU/hr conversion calculates the heat output equivalent of electrical power. 1 watt is equal to approximately 3.412142 BTU per hour. This conversion is useful for comparing electrical devices with heating systems.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Q \) — Heat output in BTU per hour
• \( W \) — Electrical power in watts
• 3.412142 — Conversion factor (BTU/hr per watt)

Explanation: The conversion factor comes from the definition of BTU and watt, where 1 BTU is approximately 1055.06 joules and 1 watt is 1 joule per second.

3. Importance of Power to Heat Conversion

Details: This conversion is essential for HVAC system design, electrical heater sizing, energy efficiency calculations, and comparing different heating systems.

4. Using the Calculator

Tips: Enter the power in watts (must be a positive number). The calculator will automatically compute the equivalent heat output in BTU per hour.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 3.412142?
A: This comes from the exact conversion between the British Thermal Unit (BTU) and joules (1 BTU = 1055.06 J), and the definition of watt (1 W = 1 J/s).

Q2: How accurate is this conversion?
A: The conversion is mathematically exact based on the definitions of the units. However, actual heat output may vary slightly due to efficiency factors.

Q3: Can I convert BTU/hr back to watts?
A: Yes, divide BTU/hr by 3.412142 to get watts. For example, 1000 BTU/hr ÷ 3.412142 ≈ 293.07 watts.

Q4: Does this account for heating efficiency?
A: No, this is a direct unit conversion. Actual heat output may be less due to system inefficiencies.

Q5: What are common applications?
A: Used for sizing electric heaters, comparing AC units, calculating heat output of electronics, and energy efficiency calculations.