The British thermal unit (Btu) is a measure of heat, which is a form of energy. It was originally defined as the amount of heat required to raise the temperature of one pound of water by one …

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 …

Jun 18, 2025 · BTU stands for British Thermal Units and is a measurement of thermal energy. It was first used in the late 1800s and has since become one of the most common units of …

Jul 30, 2025 · BTUs measure heating and cooling capacity. Learn how BTUs impact comfort, plus how to calculate your needs and choose the right system for your space.

Air conditioners, furnaces, and stoves are generally rated by BTUs. (Though "BTUs" is often short for "BTUs per hour;" in air-conditioner ratings, for instance, "BTUs" really means "BTUs of …

Jun 3, 2025 · BTUs and Tons – In central heat pump and air conditioner lingo, the term “tons” is used to describe heating and cooling capacity. 12,000 BTUs equals 1 ton of heating or air …

Two free calculators estimate the number of BTUs needed to cool or heat a room or house based on its size, insulation, and some other conditions.

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 …

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 …

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) …