What Is This Tool?
This tool converts thermal resistance measurements from the Imperial/British unit degree Fahrenheit second per Btu (IT) to the SI unit kelvin per watt (K/W). It allows users to translate temperature difference per heat-flow values between these systems for consistent thermal calculations across various applications.
How to Use This Tool?
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Enter the thermal resistance value in degree Fahrenheit second/Btu (IT).
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Select the desired output unit as kelvin per watt (K/W).
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Submit to get the converted value based on the defined conversion rate.
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Use the result for engineering or simulation purposes in SI units.
Key Features
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Converts thermal resistance from degree Fahrenheit second/Btu (IT) to kelvin/watt (K/W).
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Supports unit translation for HVAC, electronics, and material thermal models.
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Browser-based and easy to use with quick numeric input and output.
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Facilitates integration of Imperial and SI units in thermal simulations.
Examples
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10 °F·s/Btu (IT) converts to 0.005265651 K/W.
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100 °F·s/Btu (IT) converts to 0.05265651 K/W.
Common Use Cases
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Performing thermal calculations in HVAC and heat exchanger models using Btu/s power units.
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Converting building insulation R-values from hourly to per-second Imperial time basis for simulations.
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Testing materials and building computational thermal models with mixed unit systems.
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Specifying thermal resistance in electronics like CPUs and power transistors in SI units.
Tips & Best Practices
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Ensure input values represent steady-state thermal resistance conditions for accuracy.
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Use the tool to convert for compatible unit systems during thermal design tasks.
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Be cautious when combining results with transient or nonlinear thermal analyses.
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Validate conversions with known reference values when possible.
Limitations
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Assumes steady-state conditions and linear thermal resistance behavior.
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Imperial unit basis on °F and Btu/s requires careful interpretation alongside SI units.
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Not suited for modeling transient or nonlinear thermal behaviors without additional data.
Frequently Asked Questions
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What does degree Fahrenheit second/Btu (IT) measure?
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It is a thermal resistance unit expressing temperature difference in degrees Fahrenheit per heat flow rate in Btu per second, used mainly in the Imperial/British system.
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Why convert degree Fahrenheit second/Btu (IT) to kelvin/watt (K/W)?
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Converting to K/W enables consistent thermal analysis in the SI system, which is essential for integrating data across different unit systems and performing standardized simulations.
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Can this conversion be used for transient thermal behaviors?
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No, the conversion assumes steady-state conditions and linear behavior; transient or nonlinear thermal models require more complex approaches.
Key Terminology
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Degree Fahrenheit second/Btu (IT)
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An Imperial unit of thermal resistance expressing temperature difference in °F per heat flow of one Btu per second.
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Kelvin per watt (K/W)
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An SI unit of thermal resistance quantifying temperature difference per unit of steady heat flow.
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Thermal resistance
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A property describing how strongly an object resists heat transfer between two points.