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Tubing Length Formula:
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The In Floor Radiant Heat Tubing Calculation determines the required length of tubing needed for a radiant floor heating system based on the area to be heated and the spacing between tubing loops.
The calculator uses the formula:
Where:
Explanation: The formula calculates how many linear feet of tubing are needed by dividing the area by the spacing and converting from inches to feet.
Details: Accurate tubing length calculation is essential for proper system design, ensuring even heat distribution, avoiding under or over-supply of tubing, and optimizing system efficiency and cost.
Tips: Enter the area in square feet and the spacing between tubing loops in inches. Both values must be positive numbers. Typical spacing ranges from 6-12 inches depending on heat requirements.
Q1: What spacing should I use for my radiant floor system?
A: Typical spacing ranges from 6-12 inches. Closer spacing (6-8 inches) provides more heat output, while wider spacing (9-12 inches) is sufficient for most residential applications.
Q2: Does this calculation account for manifold connections?
A: No, this calculation provides the linear feet of tubing in the heated area only. Additional length should be added for connections to the manifold and any vertical runs.
Q3: How much extra tubing should I order?
A: It's recommended to order 10-15% extra tubing to account for layout variations, mistakes, and future repairs.
Q4: Can I use this calculator for different tubing types?
A: Yes, the calculation works for PEX, PEX-AL-PEX, and other radiant heating tubing types since it's based on area coverage, not tubing material.
Q5: How does tubing length affect system performance?
A: Proper tubing length ensures even heat distribution and maintains proper flow rates. Too long loops can cause pressure drops and uneven heating, while too short loops may not provide sufficient coverage.