Length x Width x Desired Temperature Rise x 12 = Required BTU. Example (10 x 20 ft. pool; desired temp rise of 20 degrees Fahrenheit): 10 x 20 x 20 x 12 = 48k BTU. When you are deciding what size pool heater to purchase, it is important. to understand that a larger heater will heat the water faster.
Built In Refrigerators. Built in refrigerators are only finished on the front and fit flush with the surrounding cabinetry for a sleek, high-end look. A built in refrigerator is designed to fit into a cabinet depth of 23 1/2 to 26 inches and can be customized with panels to match the overall design and style of your kitchen.
The first commercial refrigerator designed to keep food cold was sold in 1911 (by the General Electric Company) and in 1913 (invented by Fred W. Wolf of Fort Wayne, Indiana, USA); these model consisted of a unit that was mounted on top of an ice box.