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How to Convert from Btu (th)/hour/square foot to Btu (th)/second/square foot
Learn how to convert heat flux density measurements from Btu (th)/hour/square foot to Btu (th)/second/square foot using a simple unit conversion formula relevant for HVAC and building science applications.
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Btu (th)/hour/square foot to Btu (th)/second/square foot Conversion Table
| Btu (th)/hour/square foot | Btu (th)/second/square foot |
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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)/hour/square foot | Btu (th)/second/square foot |
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What Is This Tool?
This converter allows you to transform measurements of heat flux density from Btu (th)/hour/square foot into Btu (th)/second/square foot. It is designed for use in engineering, building science, and HVAC contexts where precise time-unit conversions enhance thermal analysis.
How to Use This Tool?
- Enter the heat flux density value in Btu (th)/hour/square foot
- Select the input and output units as Btu (th)/hour/square foot and Btu (th)/second/square foot respectively
- Apply the conversion to get the equivalent heat flux density expressed per second
Key Features
- Converts heat flux density units between hourly and per-second basis within Imperial measurements
- Based on a specific conversion factor reflecting time unit change
- Supports accurate representation of heat transfer rates per unit area
- Helpful in building envelope, HVAC load calculations, and fire-exposure testing
Examples
- Convert 10 Btu (th)/hour/square foot to Btu (th)/second/square foot: 10 × 0.0002777778 = 0.002777778 Btu (th)/second/square foot
- Convert 50 Btu (th)/hour/square foot to Btu (th)/second/square foot: 50 × 0.0002777778 = 0.01388889 Btu (th)/second/square foot
Common Use Cases
- Expressing heat loss or gain through windows, walls, and roofs in building science
- Sizing HVAC loads based on thermal transfer through building envelopes
- Specifying surface heat fluxes in fire testing and material flammability assessments
- Quantifying heat loads on ducts and furnace surfaces in thermal system designs
Tips & Best Practices
- Ensure all units are consistent when performing conversions to avoid errors
- Use the precise conversion factor for time unit accuracy
- Apply conversions to better match analysis time scales in engineering calculations
- Be mindful that Imperial units need adjustments for SI-based equipment or formulas
Limitations
- The small conversion factor requires careful handling to maintain unit consistency
- Imperial units may not directly integrate with SI-based tools or measurement systems without further conversion
Frequently Asked Questions
- What does Btu (th)/hour/square foot measure?
- It measures heat flux density as the amount of heat transferred per hour per square foot, used commonly in building science and HVAC.
- Why convert to Btu (th)/second/square foot?
- Converting to per-second units offers greater precision and is useful for detailed thermal analysis and real-time measurements.
- Can I use this conversion for SI units?
- This tool converts between two Imperial units; integrating with SI units requires additional conversions.
Key Terminology
- Btu (th)/hour/square foot
- Heat flux density unit representing thermochemical Btu transferred per hour through one square foot of area.
- Btu (th)/second/square foot
- Heat flux density unit indicating thermochemical Btu energy transferred per second over one square foot.
- Heat Flux Density
- A measure of heat transfer rate per unit area, important for thermal performance assessment.