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

It measures thermal conductivity based on the International Table British thermal unit, indicating heat flow per hour through a material one inch thick and one square foot in area for a 1 °F temperature difference.

Why convert from Btu (IT) to Btu (th)?

Converting aligns thermal conductivity measurements with thermochemical Btu standards used in certain U.S. engineering and building applications to ensure accurate heat flow analysis.

Can this conversion be used for materials outside building applications?

This conversion is generally limited to thermal conductivity of building materials and may not be appropriate for other materials or scientific purposes.

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

A practical guide on converting thermal conductivity units from Btu (IT) inch/hour/sq. foot/°F to Btu (th) inch/hour/sq. foot/°F, useful in building and HVAC engineering applications.

Btu (IT) inch/hour/sq. foot/°F

Btu (th) inch/hour/sq. foot/°F

Please check your input. It must be a valid numeric value.

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

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

Explore More Thermal Conductivity Units Converter

What Is This Tool?

This converter allows you to change thermal conductivity values measured in Btu (IT) inch/hour/sq. foot/°F into equivalent values expressed in Btu (th) inch/hour/sq. foot/°F. These units are used primarily in building and HVAC engineering to evaluate heat transfer through materials.

How to Use This Tool?

Enter the thermal conductivity value in Btu (IT) inch/hour/sq. foot/°F.
Select the desired output unit as Btu (th) inch/hour/sq. foot/°F.
Click the convert button to get the equivalent value.
Review the result for use in building energy modeling or material specification.

Key Features

Converts thermal conductivity between Btu (IT) and Btu (th) units.
Supports measurements commonly used in building and HVAC fields.
Provides quick and browser-based unit conversion with simple input.
Uses exact conversion factor aligned with U.S. customary engineering standards.

Examples

5 Btu (IT) inch/hour/sq. foot/°F converts to approximately 5.0033460805 Btu (th) inch/hour/sq. foot/°F.
10 Btu (IT) inch/hour/sq. foot/°F converts to roughly 10.006692161 Btu (th) inch/hour/sq. foot/°F.

Common Use Cases

Specifying thermal conductivity of insulation materials like fiberglass and rigid foam.
Calculating steady-state heat transfer in walls, roofs, or glazing for HVAC and energy models.
Comparing thermal performance of construction materials adhering to North American building codes.
Converting conductivity values to determine insulation resistance (R-value) for building design.

Tips & Best Practices

Ensure input values are accurate and correspond to the specified units before conversion.
Use the converter to align measurements with required regional standards for building projects.
Be aware that although the conversion factor is close to 1, slight differences may affect detailed thermal analyses.
Use this conversion primarily for building materials and HVAC-related calculations.

Limitations

The conversion factor between Btu (IT) and Btu (th) is very close to one, reflecting minimal differences.
This tool is intended for thermal conductivity measurements in building materials and may not apply to other scientific contexts.
Precision requirements might limit the tool’s applicability for very detailed thermal performance evaluations.

Frequently Asked Questions

What does Btu (IT) inch/hour/sq. foot/°F measure?: It measures thermal conductivity based on the International Table British thermal unit, indicating heat flow per hour through a material one inch thick and one square foot in area for a 1 °F temperature difference.
Why convert from Btu (IT) to Btu (th)?: Converting aligns thermal conductivity measurements with thermochemical Btu standards used in certain U.S. engineering and building applications to ensure accurate heat flow analysis.
Can this conversion be used for materials outside building applications?: This conversion is generally limited to thermal conductivity of building materials and may not be appropriate for other materials or scientific purposes.

Key Terminology

Btu (IT) inch/hour/sq. foot/°F: A thermal conductivity unit using the International Table British thermal unit describing heat flow per hour through a material 1 inch thick and 1 square foot in area for a 1 °F temperature difference.
Btu (th) inch/hour/sq. foot/°F: A thermal conductivity unit using the thermochemical British thermal unit defining heat flow per hour through a material 1 inch thick and 1 square foot area for a 1 °F difference, used in U.S. customary engineering.
Thermal Conductivity: A material property that indicates how readily heat passes through a solid material.

Quick Knowledge Check

What does the unit Btu (IT) inch/hour/sq. foot/°F represent?

Heat transfer per hour through a material measured using thermochemical Btu

Heat flow per hour through 1 inch thickness and 1 sq. foot area for a 1 °F difference using International Table Btu

Thermal resistance of insulation material

What is the approximate conversion factor from Btu (IT) to Btu (th)?

1.5

1.0006692161

0.999

In which fields is this conversion tool primarily used?

Chemical manufacturing

Building energy modeling and HVAC engineering

Automotive engineering

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