1. What is a Radiator Output Calculator?

Definition: This calculator estimates the heat output of a radiator based on its surface area, specific output per square foot, and temperature difference.

Purpose: It helps HVAC professionals and homeowners determine the heating capacity of radiators for proper system design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Output \) — Heat output (BTU or kW)
• \( Surface\ Area \) — Radiator surface area (sq ft or m²)
• \( Output\ per\ Sq\ Ft \) — Specific output per unit area (BTU/sq ft or kW/m²)
• \( \Delta T \) — Temperature difference between radiator and room (°F or °C)

Explanation: The formula multiplies the radiator's physical size by its heat transfer characteristics and the driving temperature difference.

3. Importance of Radiator Output Calculation

Details: Accurate output calculation ensures proper room heating, energy efficiency, and correct radiator sizing for spaces.

4. Using the Calculator

Tips: Enter the radiator surface area in sq ft, output per sq ft (default 1.5 BTU/sq ft), and delta T (default 50°F). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Delta T in radiator calculations?
A: Delta T (ΔT) is the temperature difference between the radiator surface and the room air temperature.

Q2: What's a typical output per sq ft for radiators?
A: Most radiators output about 1.5 BTU per hour per sq ft per °F temperature difference, but this varies by material and design.

Q3: How do I find my radiator's surface area?
A: Measure the length and height of each panel and sum their areas (length × height × number of panels).

Q4: Can I use this for different radiator types?
A: Yes, but adjust the output per sq ft value accordingly (e.g., 1.2 for cast iron, 1.8 for aluminum).

Q5: How do I convert BTU to kW?
A: 1 kW = 3412 BTU. Divide BTU by 3412 to get kW equivalent.