1. What is a kW to BTU Heating Calculator?

Definition: This calculator converts power in kilowatts (kW) to heat output in British Thermal Units per hour (BTU/h).

Purpose: It helps HVAC professionals and engineers convert electrical power ratings to thermal output for heating systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q_{btu} \) — Heat output (BTU per hour)
• \( P_{kW} \) — Power input (kilowatts)

Explanation: 1 kW is equivalent to 3412 BTU/h, as this is the standard conversion factor for electrical power to heat output.

3. Importance of kW to BTU Conversion

Details: This conversion is essential for sizing heating equipment, comparing different heating systems, and ensuring proper heat output for spaces.

4. Using the Calculator

Tips: Simply enter the power in kilowatts (must be > 0) and the calculator will instantly show the equivalent BTU/h output.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 3412?
A: This comes from the exact conversion where 1 kW = 3412.142 BTU/h, based on the International Table BTU definition.

Q2: Does this work for all heating systems?
A: This gives theoretical maximum output. Actual output may be lower due to system inefficiencies.

Q3: Can I use this for cooling systems?
A: No, cooling systems have different conversion factors due to the refrigeration cycle.

Q4: How accurate is this conversion?
A: Mathematically exact for electrical resistance heating. Other systems may have efficiency factors.

Q5: What's a typical kW rating for residential heaters?
A: Most residential heaters range from 1.5 kW to 5 kW, equivalent to 5,118 to 17,060 BTU/h.