17. What is the difference between standard Double Hung and Heavy Duty Magnum Double Hung Windows?

Standard Double Hung Windows come in a wide range of standard sizes appropriate for normal residential construction applications. As a standard Double Hung Window increases in size, the weight of the sash requires a more robust construction and built-in assistance to aid its sash movement ability to be opened and shut with ease. For this reason, BiltBest Window OEM Replacement Parts has created the UD Double Hung Super Magnum Replacement Window.