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How to Convert from Btu (th)/second/square foot to Btu (th)/hour/square foot
Learn how to convert heat flux density units from Btu (th)/second/square foot to Btu (th)/hour/square foot with this practical guide designed for HVAC and building science applications.
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Btu (th)/second/square foot to Btu (th)/hour/square foot Conversion Table
| Btu (th)/second/square foot | Btu (th)/hour/square foot |
|---|
Custom Unit Conversion Table Generator – Instant Printable Conversion Tables
Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
| Btu (th)/second/square foot | Btu (th)/hour/square foot |
|---|
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What Is This Tool?
This converter helps you change heat flux density measurements from Btu (th) per second per square foot to Btu (th) per hour per square foot, units commonly used in engineering and building science to express the rate of heat transfer per unit area.
How to Use This Tool?
- Enter the heat flux density value in Btu (th)/second/square foot.
- Select the target unit Btu (th)/hour/square foot.
- Click convert to obtain the equivalent heat flux density value expressed per hour.
- Use the converted value for building energy calculations, HVAC load sizing, or energy code compliance.
Key Features
- Converts heat flux density values between two Imperial units measuring heat transfer per area and time.
- Supports applications in HVAC, building envelope energy assessments, and fire safety testing.
- Browser-based and easy to use for quick conversion of heat flux measurements.
Examples
- 2 Btu (th)/second/square foot is equal to 7199.99999999 Btu (th)/hour/square foot.
- 0.5 Btu (th)/second/square foot converts to 1799.9999999975 Btu (th)/hour/square foot.
Common Use Cases
- Calculating heat transfer through walls, windows, or insulation for HVAC and building-envelope energy analysis.
- Determining thermal loads on furnace surfaces or ducts in thermal system design.
- Assessing surface heat flux in material flammability and fire-exposure tests.
- Expressing heat loss or gain rates in building science and energy code reporting.
Tips & Best Practices
- Use hourly heat flux density units for building and HVAC calculations to align with industry standards.
- Ensure steady-state heat flux conditions when applying this conversion for accuracy.
- Compare converted values to insulation ratings and energy codes that commonly use Btu (th)/hour/square foot.
Limitations
- The conversion assumes a constant heat flux over time and may not apply to transient or rapidly changing conditions.
- Measurement precision and rounding can affect the accuracy of converted values in practical use.
Frequently Asked Questions
- Why convert Btu (th)/second/square foot to Btu (th)/hour/square foot?
- Converting to hourly units provides a timescale commonly used in building science and HVAC for comparing heat transfer rates and complying with energy codes.
Key Terminology
- Heat Flux Density
- The rate of heat transfer per unit area, indicating how much thermal energy passes through a surface over time.
- Btu (th)
- The thermochemical British thermal unit, a unit of heat energy used in describing heat transfer.