1. What is a Combi Boiler BTU Calculator?

Definition: This calculator converts combi boiler power rating from kilowatts (kW) to British Thermal Units per hour (BTU/h).

Purpose: It helps homeowners and heating professionals understand boiler capacity in both metric and imperial units for proper system sizing.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: 1 kW equals 3412 BTU/h, as this is the standard conversion factor between these units of power.

3. Importance of BTU Calculation

Details: Knowing both kW and BTU ratings helps when comparing boilers from different manufacturers or when working with heating systems that use different measurement standards.

4. Using the Calculator

Tips: Simply enter the boiler's kW rating to get the equivalent BTU/h output. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 3412 as the conversion factor?
A: This is the exact conversion - 1 kW equals 3412.142 BTU/h, as defined by the energy conversion standards.

Q2: Is this accurate for all combi boilers?
A: Yes, this is a direct unit conversion regardless of boiler type or efficiency.

Q3: Where can I find my boiler's kW rating?
A: Check the manufacturer's specifications plate on the boiler or the product documentation.

Q4: How does this relate to heating capacity?
A: The BTU/h output represents the maximum heat the boiler can produce in one hour under optimal conditions.

Q5: Should I round the result?
A: Most manufacturers round to the nearest 1000 BTU for marketing specifications.