What is the difference between Btu (th) and Btu (IT)?

Btu (th) refers to the thermochemical British thermal unit, while Btu (IT) is the International Table British thermal unit, each based on different definitions of heat energy.

Why convert heat flux density from per hour to per minute?

Converting time units adjusts the rate measurement to the desired time base, which is important for accurate HVAC load and thermal performance calculations.

Where is this conversion commonly applied?

It is used in building science, HVAC engineering, insulation studies, fenestration performance, and industrial heat exchanger assessments.

How to Convert from Btu (th)/hour/square foot to Btu (IT)/minute/square foot?

Learn how to convert heat flux density values from Btu (th)/hour/square foot to Btu (IT)/minute/square foot, including common uses and step-by-step instructions for HVAC and building science applications.

Btu (th)/hour/square foot

Btu (IT)/minute/square foot

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

Btu (th)/hour/square foot to Btu (IT)/minute/square foot Conversion Table

Btu (th)/hour/square foot	Btu (IT)/minute/square foot

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)/hour/square foot to Btu (IT)/minute/square foot Conversion Table
Btu (th)/hour/square foot	Btu (IT)/minute/square foot

Explore More Heat Flux Density Units Converter

What Is This Tool?

This converter transforms heat flux density measurements from Btu (thermochemical) per hour per square foot to Btu (International Table) per minute per square foot, facilitating comparisons and calculations in HVAC and building science.

How to Use This Tool?

Enter the heat flux density value in Btu (th)/hour/square foot
Select the conversion to Btu (IT)/minute/square foot
Click convert to get the equivalent heat flux density in the target unit
Use the converted value for HVAC load sizing, insulation assessments, or building energy analysis

Key Features

Converts between thermochemical and International Table heat flux units
Adjusts heat flux density measurements for different time bases (hour to minute)
Supports applications in HVAC load calculations and thermal performance assessments
Browser-based and easy to use with straightforward input and output fields

Examples

Convert 10 Btu (th)/hour/square foot to Btu (IT)/minute/square foot: 10 × 0.0166555204 = 0.166555204
Convert 50 Btu (th)/hour/square foot to Btu (IT)/minute/square foot: 50 × 0.0166555204 = 0.83277602

Common Use Cases

Expressing heat loss or gain through windows, walls, and roofs for building envelope evaluations
Calculating HVAC loads by assessing heat transfer rates per unit area
Analyzing thermal performance and solar heat gain for insulation and fenestration
Rating heat transfer on heating/cooling coils, ducts, and heat exchangers in building and industrial settings

Tips & Best Practices

Ensure to match the unit standards (thermochemical vs International Table) when converting
Be mindful of the change in time units from hours to minutes during conversions
Use this tool to support accurate HVAC load calculations and thermal performance studies
Double-check converted values for precision in critical building science applications

Limitations

Different definitions of Btu (thermochemical vs International Table) can cause minor discrepancies
Ignoring time unit differences may lead to errors in heat flux density calculations
Small unit conversion issues can affect the precision of thermal load estimations

Frequently Asked Questions

What is the difference between Btu (th) and Btu (IT)?: Btu (th) refers to the thermochemical British thermal unit, while Btu (IT) is the International Table British thermal unit, each based on different definitions of heat energy.
Why convert heat flux density from per hour to per minute?: Converting time units adjusts the rate measurement to the desired time base, which is important for accurate HVAC load and thermal performance calculations.
Where is this conversion commonly applied?: It is used in building science, HVAC engineering, insulation studies, fenestration performance, and industrial heat exchanger assessments.

Key Terminology

Btu (th)/hour/square foot: A measurement of heat flux density equal to one thermochemical British thermal unit transferred per hour through one square foot.
Btu (IT)/minute/square foot: A heat flux density unit denoting one International Table British thermal unit of energy transferred per minute through one square foot.
Heat Flux Density: The rate of heat transfer per unit area, often used in building and HVAC calculations to quantify thermal performance.

Quick Knowledge Check

What does Btu (th)/hour/square foot measure?

Heat flux density using International Table units

Heat flux density using thermochemical British thermal units

Thermal capacity of a material

Why convert from Btu (th)/hour/square foot to Btu (IT)/minute/square foot?

To adjust for different definitions and time bases in HVAC calculations

To measure heat capacity instead of heat flux

To convert from metric to imperial units

In which field is this unit conversion most commonly used?

Building science and HVAC engineering

Automotive engine design

Pharmaceutical manufacturing

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