1. What is a Gas Boiler kW Rating Calculator?

Definition: This calculator converts boiler capacity from BTU/h to kilowatts (kW), the standard unit for boiler power rating.

Purpose: It helps HVAC professionals and homeowners understand boiler capacity in different measurement systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Boiler power in kilowatts
• \( Q_{btu} \) — Boiler capacity in BTU per hour

Explanation: The conversion factor 3412 represents the number of BTUs per hour equivalent to 1 kW of power.

3. Importance of Boiler Power Calculation

Details: Proper boiler sizing ensures efficient heating, prevents energy waste, and matches the heating requirements of the space.

4. Using the Calculator

Tips: Enter the boiler's BTU/h rating (typically found on the nameplate). The calculator will instantly show the equivalent kW rating.

5. Frequently Asked Questions (FAQ)

Q1: Why convert BTU/h to kW?
A: kW is the standard unit in many countries and for technical specifications, making comparisons and system design easier.

Q2: What's a typical kW rating for residential boilers?
A: Most homes need 15-30 kW boilers, but this varies based on climate, insulation, and home size.

Q3: Is 3412 the exact conversion factor?
A: Yes, 1 kW = 3412.142 BTU/h exactly, based on the International Table BTU definition.

Q4: How do I find my boiler's BTU rating?
A: Check the manufacturer's nameplate, specification sheet, or product documentation.

Q5: Does this work for all boiler types?
A: Yes, the conversion applies to gas, oil, and electric boilers - only the input energy differs.