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How to Convert from Btu (th) inch/second/sq. foot/°F to Btu (IT) inch/hour/sq. foot/°F
Learn the process to convert thermal conductivity values from Btu (th) inch/second/sq. foot/°F to Btu (IT) inch/hour/sq. foot/°F, two common Imperial units used in building and HVAC engineering.
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Btu (th) inch/second/sq. foot/°F to Btu (IT) inch/hour/sq. foot/°F Conversion Table
| Btu (th) inch/second/sq. foot/°F | Btu (IT) inch/hour/sq. foot/°F |
|---|
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) inch/second/sq. foot/°F | Btu (IT) inch/hour/sq. foot/°F |
|---|
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What Is This Tool?
This converter allows you to transform thermal conductivity measurements from Btu (th) inch/second/sq. foot/°F to Btu (IT) inch/hour/sq. foot/°F units. These units describe heat transfer rates through materials in building and HVAC applications using different definitions of British thermal units and time scales.
How to Use This Tool?
- Enter the thermal conductivity value in Btu (th) inch/second/sq. foot/°F.
- Select the target unit as Btu (IT) inch/hour/sq. foot/°F.
- Click convert to obtain the equivalent value applying the correct conversion factor.
- Use the result for building materials data, HVAC calculations, or engineering reports.
Key Features
- Converts between two Imperial thermal conductivity units used in HVAC and building engineering.
- Applies the precise conversion factor aligning thermochemical and International Table Btu definitions.
- Supports engineering analyses including HVAC load calculations and insulation performance evaluations.
- Browser-based and easy to use for quick unit conversion needs.
Examples
- 0.5 Btu (th) inch/second/sq. foot/°F equals approximately 1798.8 Btu (IT) inch/hour/sq. foot/°F.
- 2 Btu (th) inch/second/sq. foot/°F converts to about 7195.2 Btu (IT) inch/hour/sq. foot/°F.
Common Use Cases
- Reporting thermal conductivity of building materials and insulations in US customary units for HVAC and building envelope analyses.
- Performing conduction heat-transfer calculations using older engineering standards or documents based on Imperial units.
- Converting material property data between the thermochemical and International Table Btu systems on datasheets and analyses.
- Evaluating insulation products in product specifications and North American building codes.
Tips & Best Practices
- Ensure precise input values to avoid numerical errors due to the large conversion factor.
- Verify unit definitions when comparing data from different sources to maintain consistency.
- Use this conversion to align datasets for HVAC load and energy modeling calculations.
- Be mindful of the difference in Btu definitions to improve compatibility in analyses.
Limitations
- The large conversion factor may cause numerical inaccuracies without high precision handling.
- Differences between thermochemical and International Table Btu definitions require careful attention to maintain accuracy.
Frequently Asked Questions
- Why is the conversion factor so large between these units?
- Because one unit measures heat transfer per second and the other per hour, the conversion factor accounts for the time difference and different Btu definitions.
- Can I use this conversion for all thermal conductivity materials?
- This conversion is intended for materials where Imperial units and these specific Btu definitions are applicable, commonly in building and HVAC contexts.
- Do I need to be cautious about unit consistency in engineering calculations?
- Yes, careful unit consistency is essential to avoid errors, especially when dealing with large conversion factors and different Btu definitions.
Key Terminology
- Btu (th) inch/second/sq. foot/°F
- An Imperial unit of thermal conductivity using thermochemical British thermal unit transferred per second through a 1‑inch thick material with 1 square foot area at 1 °F temperature difference.
- Btu (IT) inch/hour/sq. foot/°F
- A unit of thermal conductivity using International Table British thermal unit transferred per hour through 1 inch thick material at 1 square foot area per 1 °F temperature difference.
- Thermal Conductivity
- A measurement of a material’s ability to conduct heat, typically expressed as heat transferred through a material per unit thickness, area, time, and temperature difference.