1. What is a Radiant BTU per Sq Ft Calculator?

Definition: This calculator estimates the total heat output (in BTU/h) for radiant heating systems based on area and BTU per square foot requirements.

Purpose: It helps HVAC professionals and homeowners determine the heating capacity needed for radiant floor or wall heating systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The area is multiplied by the required heat intensity to determine the total system capacity needed.

3. Importance of Radiant Heat Calculation

Details: Proper calculation ensures comfortable heating, energy efficiency, and correct system sizing for radiant applications.

4. Using the Calculator

Tips: Enter the area in square feet and BTU per square foot requirement (default 30 BTU/h·ft² for typical residential applications). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical BTU/ft² value for radiant floors?
A: Residential spaces typically need 25-35 BTU/h·ft², while bathrooms may need 35-50 BTU/h·ft².

Q2: How does this differ for different room types?
A: Bedrooms need less (25-30), living areas need moderate (30-35), and bathrooms/entryways need more (35-50) BTU/h·ft².

Q3: What factors affect BTU/ft² requirements?
A: Climate, insulation, floor covering, room usage, and desired temperature all influence the requirements.

Q4: How do I calculate BTU/ft² for my specific project?
A: Consult HVAC manuals or use our Radiant Heat Load Calculator for precise calculations.

Q5: Does this include heat loss calculations?
A: No, this is a basic calculator. For complete design, consider heat loss through walls, windows, and ceilings.