BTU Calculation Formula:
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Definition: This calculator estimates the BTUs (British Thermal Units) needed for a PEX radiant floor heating system based on the square footage of the area.
Purpose: It helps homeowners and contractors determine the heating requirements for radiant floor installations.
The calculator uses the formula:
Where:
Explanation: The standard calculation uses 25 BTUs per square foot as a general rule for radiant floor heating systems.
Details: Proper BTU estimation ensures efficient heating, proper system sizing, and energy-efficient operation of your radiant floor system.
Tips: Enter the square footage of the area to be heated. The value must be > 0.
Q1: Why 25 BTUs per square foot?
A: This is a standard value for well-insulated homes. Adjustments may be needed for poorly insulated spaces or specific climate conditions.
Q2: Does this account for heat loss?
A: The 25 BTU/sq ft factor includes typical heat loss calculations for residential applications.
Q3: When would I need more BTUs?
A: In colder climates, poorly insulated spaces, or rooms with high ceilings, you might need 30-40 BTUs per square foot.
Q4: How does this relate to PEX tubing spacing?
A: The BTU calculation helps determine tubing spacing - higher BTU requirements typically need closer tubing spacing.
Q5: Is this calculation different for concrete vs wood subfloors?
A: The basic calculation is the same, but thermal mass differences may affect warm-up times and system design.