1. What is a Boiler Sizing Calculator UK?

Definition: This calculator converts British Thermal Units (BTU) per hour to kilowatts (kW) for boiler sizing in UK homes.

Purpose: It helps homeowners and heating engineers determine the appropriate boiler size for efficient heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: 3412 BTU/h equals 1 kW, so dividing BTU/h by this conversion factor gives the equivalent power in kW.

3. Importance of Proper Boiler Sizing

Details: Correct boiler sizing ensures energy efficiency, proper heating, and prevents short cycling or insufficient heating capacity.

4. Using the Calculator

Tips: Enter the required heat output in BTU/h. The value must be > 0. The calculator will output the equivalent boiler size in kW.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my home's BTU requirement?
A: Use a heat loss calculation or consult with a heating engineer who can assess your property's size, insulation, and other factors.

Q2: What's a typical boiler size for UK homes?
A: Most UK homes require 24-30kW combi boilers, but this varies based on property size and heat demand.

Q3: Why convert BTU to kW?
A: UK boiler specifications are typically given in kW, while some heat loss calculations may provide results in BTU.

Q4: Is bigger boiler always better?
A: No, oversized boilers operate less efficiently and have shorter lifespans due to frequent on/off cycling.

Q5: Should I round up the kW result?
A: Boilers come in standard sizes, so choose the next available size above your calculated requirement.