What does Btu (th) foot/hour/sq. foot/°F measure?

It is a unit of thermal conductivity that expresses the heat transferred in Btu per hour through a 1-foot thickness and 1 square foot area with a 1 °F temperature difference.

Why convert to Btu (IT) inch/hour/sq. foot/°F?

Converting to Btu (IT) inch/hour/sq. foot/°F aligns data with building and HVAC standards, especially when working with inch-thick materials common in North American construction.

Are there any assumptions when making this conversion?

Yes, the conversion assumes steady-state heat conduction and uniform material thickness, and slight variations can arise from differences in British Thermal Unit definitions.

Convert Btu (th) foot/hour/sq. foot/°F to Btu (IT) inch/hour/sq. foot/°F

Online converter to transform thermal conductivity values from Btu (th) foot/hour/sq. foot/°F to Btu (IT) inch/hour/sq. foot/°F, useful for HVAC and building applications.

Btu (th) foot/hour/sq. foot/°F

Btu (IT) inch/hour/sq. foot/°F

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Btu (th) foot/hour/sq. foot/°F to Btu (IT) inch/hour/sq. foot/°F Conversion Table

Btu (th) foot/hour/sq. foot/°F	Btu (IT) inch/hour/sq. foot/°F

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Btu (th) foot/hour/sq. foot/°F to Btu (IT) inch/hour/sq. foot/°F Conversion Table
Btu (th) foot/hour/sq. foot/°F	Btu (IT) inch/hour/sq. foot/°F

Explore More Thermal Conductivity Units Converter

What Is This Tool?

This tool allows users to convert thermal conductivity measurements from Btu (th) per foot per hour per square foot per °F to Btu (IT) per inch per hour per square foot per °F. It is designed to help professionals and students align values with industry standards in building construction and HVAC engineering.

How to Use This Tool?

Enter the thermal conductivity value in Btu (th) foot/hour/sq. foot/°F
Select the target unit as Btu (IT) inch/hour/sq. foot/°F
Click convert to see the equivalent value in the new unit
Use the output for building material specifications, heat transfer calculations, or energy modeling

Key Features

Converts thermal conductivity units used in building and insulation industries
Supports conversion between imperial units based on foot thickness and inch thickness
Provides quick and easy calculations for heat transfer analysis
Browser-based and user-friendly interface
Includes practical examples for common conversion values

Examples

Converting 2 Btu (th) foot/hour/sq. foot/°F results in 23.9839495558 Btu (IT) inch/hour/sq. foot/°F
Converting 0.5 Btu (th) foot/hour/sq. foot/°F results in 5.99598738895 Btu (IT) inch/hour/sq. foot/°F

Common Use Cases

Specifying thermal conductivity for building insulation materials like fiberglass and foam
Conducting heat transfer calculations for walls, roofs, and window assemblies in HVAC design
Aligning thermal performance data with North American building codes and specifications
Comparing material performance in energy modeling and thermal resistance assessments

Tips & Best Practices

Ensure consistent use of area units and temperature difference references to avoid errors
Use the unit conversion for steady-state thermal conduction scenarios
Review material thickness assumptions when interpreting converted values
Cross-check converted results when combining different thermal unit conventions

Limitations

Conversion assumes steady thermal conduction and uniform thickness across the material
Differences exist between British Thermal Unit (th) and British Thermal Unit (IT), possibly causing minor discrepancies
Care is needed to maintain uniform area and temperature differential units in calculations

Frequently Asked Questions

What does Btu (th) foot/hour/sq. foot/°F measure?: It is a unit of thermal conductivity that expresses the heat transferred in Btu per hour through a 1-foot thickness and 1 square foot area with a 1 °F temperature difference.
Why convert to Btu (IT) inch/hour/sq. foot/°F?: Converting to Btu (IT) inch/hour/sq. foot/°F aligns data with building and HVAC standards, especially when working with inch-thick materials common in North American construction.
Are there any assumptions when making this conversion?: Yes, the conversion assumes steady-state heat conduction and uniform material thickness, and slight variations can arise from differences in British Thermal Unit definitions.

Key Terminology

Btu (th) foot/hour/sq. foot/°F: A thermal conductivity unit describing heat transfer per hour per square foot area through a 1-foot thickness with a 1 °F temperature difference, using the British Thermal Unit (thermodynamic).
Btu (IT) inch/hour/sq. foot/°F: A thermal conductivity unit quantifying heat transfer per hour per square foot area through a 1-inch thickness with a 1 °F temperature difference, based on the British Thermal Unit (International Table).
Steady-state thermal conduction: A heat transfer condition where temperature gradients do not change with time, assumed in the unit conversion process.
Fourier’s law of heat conduction: The fundamental principle relating heat flux to thermal conductivity and temperature gradient, denoted by q = −k · dT/dx.

Quick Knowledge Check

What type of property is measured by Btu (th) foot/hour/sq. foot/°F?

Electrical conductivity

Thermal conductivity

Optical reflectivity

Which industry commonly uses Btu (IT) inch/hour/sq. foot/°F?

Automotive manufacturing

Building and HVAC engineering

Food processing

What must be consistent to avoid errors in conversions?

Material color and texture

Area units and temperature difference

Electrical voltage levels

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