1. What is the Size of Radiators Calculation?

Definition: This calculator determines the required radiator power in kilowatts based on the heating load in BTU/hour.

Purpose: It helps HVAC professionals and homeowners properly size radiators for efficient space heating.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Radiator power (kilowatts)
• \( Q_{btu} \) — Heating load (BTU/hour)

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

3. Importance of Proper Radiator Sizing

Details: Correct radiator sizing ensures efficient heating, prevents energy waste, and maintains comfortable temperatures.

4. Using the Calculator

Tips: Enter the heating load in BTU/hour. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Where do I find my heating load?
A: Heating load can be calculated through a heat loss analysis of your space or obtained from HVAC professionals.

Q2: Why convert BTU to kW?
A: Many radiator specifications use kW ratings, while heating loads are often calculated in BTU.

Q3: What's the 3412 conversion factor?
A: It's the exact conversion between BTU/hour and kilowatts (1 kW = 3412.142 BTU/h).

Q4: Should I add a safety factor?
A: Typically add 10-20% to the calculated power to account for heat loss and temperature variations.

Q5: Can I use this for all radiator types?
A: Yes, the calculation works for all radiator types, but actual sizing may vary based on efficiency.