1. What is an Electric Boiler Size Calculator?

Definition: This calculator determines the required size (in kW) of an electric boiler based on the heat output needed in BTU/h.

Purpose: It helps HVAC professionals and homeowners properly size electric boilers for heating systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula converts BTU/h to kW using the conversion factor 3412 BTU/h = 1 kW.

3. Importance of Proper Boiler Sizing

Details: Correct boiler sizing ensures efficient operation, prevents energy waste, and maintains system longevity.

4. Using the Calculator

Tips: Enter the required heat output in BTU/h. The value must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: Where does the 3412 conversion factor come from?
A: It's the exact conversion between BTU/h and kW (1 kW = 3412.142 BTU/h).

Q2: How do I determine my required heat output?
A: Perform a heat loss calculation for your building or consult an HVAC professional.

Q3: Should I add a safety factor to the calculated size?
A: Typically, add 10-20% to account for extreme conditions and system losses.

Q4: Can this calculator be used for gas boilers?
A: No, this is specifically for electric boilers. Gas boilers have different sizing considerations.

Q5: What's the typical range for residential electric boilers?
A: Most homes require 10-50 kW electric boilers, depending on size and climate.