What does Btu (IT)/hour/square foot/°F represent?

It represents the rate of heat flow, in Btu (International Table) per hour, through one square foot of area for each degree Fahrenheit difference between two sides.

Why convert to Btu (th)/second/square foot/°F?

Conversion to Btu (thermal) per second per square foot per degree Fahrenheit provides a heat transfer coefficient expressed on a per-second basis, allowing more precise or real-time thermal energy transfer calculations.

Where is this conversion commonly used?

It is commonly used in building construction for energy compliance, HVAC engineering for load calculations, and thermal performance testing of insulation and heat exchangers.

Convert Btu (IT)/hour/square foot/°F to Btu (th)/second/square foot/°F

Easily convert heat transfer coefficients from Btu (IT)/hour/square foot/°F to Btu (th)/second/square foot/°F with this online unit converter designed for energy and HVAC professionals.

Btu (IT)/hour/square foot/%b0F

Btu (th)/second/square foot/%b0F

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Btu (IT)/hour/square foot/%b0F to Btu (th)/second/square foot/%b0F Conversion Table

Btu (IT)/hour/square foot/%b0F	Btu (th)/second/square foot/%b0F

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)/hour/square foot/%b0F to Btu (th)/second/square foot/%b0F Conversion Table
Btu (IT)/hour/square foot/%b0F	Btu (th)/second/square foot/%b0F

Explore More Heat Transfer Coefficient Units Converter

What Is This Tool?

This unit converter facilitates the conversion of heat transfer coefficients between Btu (IT) per hour per square foot per degree Fahrenheit and Btu (thermal) per second per square foot per degree Fahrenheit. It helps users express thermal energy transfer rates on a per-second basis using imperial units commonly applied in building and HVAC contexts.

How to Use This Tool?

Enter the heat transfer coefficient value in Btu (IT)/hour/square foot/°F
Select the input unit and the target unit (Btu (th)/second/square foot/°F)
Click the convert button to get the corresponding value
Use the result for precise thermal energy transfer calculations in design or analysis

Key Features

Converts heat transfer coefficients between two imperial unit systems
Supports calculations needed for building envelope and HVAC designs
Browser-based and user-friendly interface
Provides clear unit definitions for accurate understanding
Suitable for energy code compliance and thermal performance assessments

Examples

Convert 5 Btu (IT)/hour/square foot/°F to Btu (th)/second/square foot/°F results in 0.0013898185 Btu (th)/second/square foot/°F
Convert 10 Btu (IT)/hour/square foot/°F to Btu (th)/second/square foot/°F results in 0.002779637 Btu (th)/second/square foot/°F

Common Use Cases

Specifying U-values for windows, walls, roofs, and other building components for energy codes
Calculating heating and cooling loads for HVAC equipment sizing and energy modeling
Comparing thermal performance of insulation and building materials
Estimating convective or conductive heat flux through building envelopes
Assessing surface performance of heat exchangers and thermal surfaces

Tips & Best Practices

Use stable and linear temperature difference scenarios for accurate conversion
Be mindful of the differences between Btu (IT) and Btu (th) definitions in detailed calculations
Handle small numerical conversion results carefully to avoid rounding errors
Consult the energy code requirements when specifying U-values and thermal performance
Use the converted values to enhance HVAC system design accuracy and thermal analyses

Limitations

Energy definitions vary between Btu (IT) and Btu (th), affecting precision
The conversion assumes stable, linear temperature differences and may not apply in dynamic conditions
Small numerical results can lead to rounding errors if not properly managed

Frequently Asked Questions

What does Btu (IT)/hour/square foot/°F represent?: It represents the rate of heat flow, in Btu (International Table) per hour, through one square foot of area for each degree Fahrenheit difference between two sides.
Why convert to Btu (th)/second/square foot/°F?: Conversion to Btu (thermal) per second per square foot per degree Fahrenheit provides a heat transfer coefficient expressed on a per-second basis, allowing more precise or real-time thermal energy transfer calculations.
Where is this conversion commonly used?: It is commonly used in building construction for energy compliance, HVAC engineering for load calculations, and thermal performance testing of insulation and heat exchangers.

Key Terminology

Btu (IT)/hour/square foot/°F: Heat flow rate measured in Btu (International Table) per hour through one square foot of area per degree Fahrenheit temperature difference.
Btu (th)/second/square foot/°F: Heat transfer coefficient expressing thermal energy transfer per second in Btu (thermal) through one square foot per degree Fahrenheit.
U-value: The overall heat transfer coefficient used to assess thermal conductivity of building envelope components.

Quick Knowledge Check

What does the unit Btu (IT)/hour/square foot/°F measure?

Electrical power consumption over time

Heat transfer rate per hour per square foot per degree Fahrenheit

Thermal conductivity in metric units

Why might an engineer convert to Btu (th)/second/square foot/°F?

To express heat transfer on a per-second basis for better precision

To convert to metric measurement units

To calculate electrical heating load

Which of the following is a limitation of the conversion?

Dynamic temperature differences may require more complex methods

It cannot be used for any building component

It assumes metric units are used throughout

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