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  1. British thermal unit - Wikipedia

    The Btu should not be confused with the Board of Trade Unit (BTU), an obsolete UK synonym for kilowatt hour (1 kW⋅h or 3,412 Btu). The Btu is often used to express the conversion-efficiency …

  2. British thermal units (Btu) - U.S. Energy Information ...

    British thermal unit (Btu) is a measure of the heat content of fuels or energy sources. One Btu is the quantity of heat required to raise the temperature of one pound of liquid water by 1&deg …

  3. What Is BTU? - Your 2025 Guide To Understanding British ...

    Jun 18, 2025 · BTU's are a commonly used specification on heating and cooling systems. But what is BTU? We explain it in simple terms and provide calculators, conversion charts and more.

  4. What Is a BTU? - HomeTips

    May 3, 2025 · BTU, short for British Thermal Unit, is a standardized, basic measurement of energy for all heating and cooling appliances. It is a measure of how much heat (or cooling) …

  5. What Does BTU Mean? The Ultimate Guide to British Thermal ...

    Jun 24, 2025 · BTU stands for British Thermal Unit—a unit of energy measurement. Specifically, one BTU is the amount of heat required to raise the temperature of one pound of water by one …

  6. What Is a BTU? The British Thermal Unit Explained

    A BTU, or British Thermal Unit, is a standard unit of measurement that quantifies the amount of heat energy required to raise the temperature of one pound of water by one degree Fahrenheit.

  7. British thermal unit (BTU) | Britannica

    British thermal unit (BTU), a measure of the quantity of heat, defined since 1956 as approximately equal to 1,055 joules, or 252 gram calories. It was defined formerly as the amount of heat …

  8. What is a BTU? HVAC Guide to British Thermal Units

    Wondering 'What is a BTU'? This HVAC guide explains British Thermal Units, why they're crucial for your heating & cooling system, sizing, and energy efficiency.

  9. What is BTU? Ultimate Guide to BTU Rating 2024 - PICKHVAC

    Jun 3, 2025 · This guide to BTU meaning answers your questions and is designed to help you understand the BTU or heat capacity options for furnaces, air conditioners, boilers and other …

  10. What Does BTU Stand For? - hvac.com

    Feb 7, 2025 · BTU stands for British Thermal Unit. It is a unit of measurement that quantifies the amount of heat required to raise the temperature of one pound of water by one degree …