What Is This Tool?
This tool converts thermal conductivity measurements from Btu (IT) inch/second/sq. foot/°F to Btu (IT) foot/hour/sq. foot/°F, aligning values for practical engineering applications in building materials and HVAC performance analysis using US customary units.
How to Use This Tool?
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Enter the thermal conductivity value in Btu (IT) inch/second/sq. foot/°F.
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Select Btu (IT) inch/second/sq. foot/°F as the input unit.
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Choose Btu (IT) foot/hour/sq. foot/°F as the output unit.
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Click the convert button to see the result instantly.
Key Features
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Converts between two specific thermal conductivity units used in Imperial/US customary systems.
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Supports thermal property analyses for building insulation and construction materials.
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Facilitates consistency between fast transient measures and common steady-state units.
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Browser-based and easy to use without installation.
Examples
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2 Btu (IT) inch/second/sq. foot/°F converts to 600 Btu (IT) foot/hour/sq. foot/°F.
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0.5 Btu (IT) inch/second/sq. foot/°F converts to 150 Btu (IT) foot/hour/sq. foot/°F.
Common Use Cases
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Specifying thermal conductivity of building insulation and other construction materials.
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Performing steady-state conduction calculations for walls, roofs, and windows in HVAC models.
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Converting thermal property data between Imperial and SI units for engineering analysis.
Tips & Best Practices
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Ensure input values are in the correct initial unit before converting.
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Use the conversion to align material data with steady-state or practical engineering conditions.
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Confirm unit consistency especially when dealing with time and thickness scales.
Limitations
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Converts between units based on different time (seconds vs. hours) and thickness (inch vs. foot) scales.
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Assumes steady-state and uniform material properties, which may not apply for transient or anisotropic materials.
Frequently Asked Questions
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What does Btu (IT) inch/second/sq. foot/°F measure?
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It measures thermal conductivity as heat flow in Btu per second through a material one inch thick and one square foot in cross-sectional area for a temperature difference of one degree Fahrenheit.
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Why convert to Btu (IT) foot/hour/sq. foot/°F?
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Because this unit is more commonly used in steady-state heat transfer calculations in HVAC and building simulation models, providing practical engineering relevance.
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Can this tool convert to SI units like W/(m·K)?
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This tool specifically converts between the two Imperial/US customary units; however, the information provided helps relate these units to SI units used in engineering.
Key Terminology
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Btu (IT) inch/second/sq. foot/°F
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A unit of thermal conductivity representing heat flow in Btu per second through a one-inch thick material with one square foot cross-section and a temperature difference of one degree Fahrenheit.
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Btu (IT) foot/hour/sq. foot/°F
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A unit of thermal conductivity representing steady heat flow in Btu per hour through a one-foot thick layer of material with one square foot cross-section at a temperature difference of one degree Fahrenheit.