1. What is an Oil Boiler Size Calculator?

Definition: This calculator determines the required oil boiler size in kilowatts (kW) based on the heat output in British Thermal Units per hour (BTU/h).

Purpose: It helps homeowners and heating professionals properly size oil boilers for efficient heating system design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Boiler power output (kilowatts)
• \( Q_{btu} \) — Heat output requirement (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 extends equipment lifespan.

4. Using the Calculator

Tips: Enter your heat output requirement in BTU/h. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine my heat output requirement?
A: Calculate based on home size, insulation, climate, or consult a heating professional for a heat loss calculation.

Q2: Why convert BTU/h to kW?
A: Many modern boilers are rated in kW, while heating requirements are often calculated in BTU/h.

Q3: Should I round up the boiler size?
A: Yes, it's common practice to round up to the nearest standard boiler size for safety margin.

Q4: What's a typical BTU/h requirement for a house?
A: A well-insulated 2,000 sq ft home might need 60,000-80,000 BTU/h in cold climates.

Q5: Does this account for domestic hot water needs?
A: No, this calculates space heating only. Add 20-25% if the boiler will also provide hot water.