1. What is an In-Floor Heat PEX Calculator?

Definition: This calculator estimates the length of PEX tubing needed for radiant floor heating systems based on floor area and tubing spacing.

Purpose: It helps heating system installers and DIY homeowners determine how much PEX tubing is required for radiant floor projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( L \) — Length of PEX tubing (meters)
• \( A \) — Floor area (square meters)
• \( S \) — Tubing spacing (meters between parallel runs)

Explanation: The floor area is divided by the spacing between tubing runs to determine the total length of tubing needed.

3. Importance of PEX Length Calculation

Details: Accurate length estimation ensures proper heat distribution, avoids material shortages, and helps with system design and cost estimation.

4. Using the Calculator

Tips: Enter the floor area in square meters and tubing spacing (default 0.2m/20cm). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical spacing for PEX tubing?
A: Standard spacing is 20-30cm (0.2-0.3m), with 20cm being most common for residential applications.

Q2: Does this include supply and return lines?
A: No, add extra length for supply/return runs to the manifold (typically 10-20% more).

Q3: How does spacing affect system performance?
A: Closer spacing provides more even heat but requires more tubing. Wider spacing may create cold spots.

Q4: Should I add extra length for connections?
A: Yes, add 5-10% to the calculated length for connections and contingencies.

Q5: What about different loop configurations?
A: For multiple loops, divide the area by number of loops before calculation.