Radiant Floor Heating BTU per Square Foot

BTU Calculation Formula:

\[ Q = A \times \text{BTU/ft}^2 \]

Total Heat Output (Q): BTU/h

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1. What is Radiant Floor Heating BTU Calculation?

Definition: This calculator determines the heat output needed for radiant floor heating systems based on area and BTU requirements per square foot.

Purpose: It helps HVAC professionals and homeowners properly size radiant heating systems for optimal comfort and efficiency.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Q = A \times \text{BTU/ft}^2 \]

Where:

\( Q \) — Total heat output (BTU/h)
\( A \) — Area to be heated (square feet)
\( \text{BTU/ft}^2 \) — Heat requirement per square foot (typically 15-30 BTU/h·ft²)

Explanation: The area is multiplied by the BTU requirement per square foot to determine the total heating capacity needed.

3. Importance of Proper BTU Calculation

Details: Accurate BTU calculation ensures comfortable heating, energy efficiency, and prevents system over/under sizing.

4. Using the Calculator

Tips: Enter the area in square feet and BTU requirement (default 20 BTU/h·ft²). Typical values range between 15-30 BTU/h·ft².

5. Frequently Asked Questions (FAQ)

Q1: What's the typical BTU/ft² range for radiant floors?
A: Most systems require 15-30 BTU/h·ft², with 20 being a common average value.

Q2: When would I use higher BTU/ft² values?
A: Use higher values (25-30) for poorly insulated spaces, colder climates, or rooms with high heat loss.

Q3: How does floor covering affect BTU requirements?
A: Thick carpets may require higher BTU output than tile or wood floors to achieve the same room temperature.

Q4: Should I include the entire floor area?
A: Only include areas that need heating (typically exclude cabinets, permanent fixtures).

Q5: How does this relate to boiler sizing?
A: The total BTU output helps determine the appropriate boiler capacity needed for the system.