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I've almost got enough to get the printer i want, i'll be able to purchase it in February. The printer is a Reprap Prusa i3 that has a print volume of 220220240MM.

One of the first things i intend to print is a 3d printer that is larger than the one i'm getting,Possibly of the same design, but i want this one to have a build volume of 500mm Cubed. I havent seen any printers with a heated bed that size so the question is, Do i really need a heated bed? what are the advantages and disadvantages to opting out of it?

Side Note: if your answer is "Google it" Don't bother responding, because if google could answer my question, i wouldn't be asking experts now would i?