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.
Transcript of THE INVENTION OF THE refrigerator Who invented the refrigerator? The first known artificial refrigerator was created by William Cullen in 1748 but his model did not work. Then in 1805 Oliver Evens invented the first refrigerator. But he never really got a patent for it so anyone cold really take his idea. The first practical refrigerator was invented by Jacob Perkins in 1834 it used a vapor compression cycle (the invention that Perkins invented it was really Olivier Evens idea because he did not patented his invention so Perkins stole it) (more facts) What people used to make refrigerators cold!