1. What is a PEX Radiant Floor Heating Calculator?

Definition: This calculator estimates the BTUs (British Thermal Units) required for PEX radiant floor heating based on the area to be heated.

Purpose: It helps homeowners and contractors determine the heating capacity needed for efficient radiant floor heating systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( BTUs \) — British Thermal Units required
• \( Square\ Footage \) — Area to be heated (square feet)

Explanation: The formula assumes 25 BTUs per square foot, which is a standard estimate for radiant floor heating in moderate climates.

3. Importance of BTU Calculation

Details: Proper BTU estimation ensures efficient heating, prevents energy waste, and helps size the boiler or heat source correctly.

4. Using the Calculator

Tips: Enter the square footage of the area to be heated. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 25 BTUs per square foot?
A: This is a standard estimate for radiant floor heating in moderate climates. Colder climates may require 30-40 BTUs/sq ft.

Q2: Does this account for heat loss?
A: This is a basic calculation. For precise results, consider insulation quality, climate, and other factors.

Q3: Can I use this for whole-house calculations?
A: Yes, but calculate each zone separately for best results as different rooms may have different requirements.

Q4: How does PEX spacing affect BTU output?
A: Closer spacing (6-8 inches) increases heat output, while wider spacing (12 inches) decreases it. This calculator assumes standard 9-inch spacing.

Q5: Should I add a safety factor?
A: Consider adding 10-15% to the calculated BTUs for system efficiency and unexpected heat loss.