1. What is a Radiant Heat Layout Calculator?

Definition: This calculator determines the number of loops needed for a radiant heat system based on floor area, tubing spacing, and maximum loop length.

Purpose: It helps HVAC professionals and installers design efficient radiant heating systems by calculating the optimal number of circuits.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{Loops} \) — Number of heating circuits needed
• \( \text{Area} \) — Floor area to be heated (square meters)
• \( \text{Spacing} \) — Distance between tubing runs (meters)
• \( \text{Max Loop Length} \) — Maximum recommended length for one circuit (meters)

Explanation: The area is divided by the product of spacing and maximum loop length to determine how many separate circuits are needed.

3. Importance of Proper Loop Calculation

Details: Correct loop calculation ensures even heat distribution, proper flow rates, and prevents excessive pressure drops in the system.

4. Using the Calculator

Tips: Enter the floor area in m², tubing spacing (default 0.15m), and maximum loop length (default 100m). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is maximum loop length important?
A: Excessive loop lengths can cause pressure drops and uneven heating. Most systems limit loops to 100-120 meters.

Q2: What's typical tubing spacing?
A: Spacing typically ranges from 0.15m to 0.30m, with 0.15m-0.20m common for high heat output areas.

Q3: Should I round up the loop count?
A: Yes, the calculator automatically rounds up to ensure full coverage of the area.

Q4: How do I determine maximum loop length?
A: Consult your tubing manufacturer's specifications, typically 100m for 1/2" PEX tubing.

Q5: Does this include manifold sizing?
A: No, this calculates only loop quantity. Manifold sizing depends on loop count and flow requirements.