A rackhouse (also known as a rickhouse) is a structure that holds barrels of alcoholic beverages during the aging process where barrels are typically stacked on their sides, often up to several stories high. Barrels at the top of the rackhouse age at an accelerated pace due to evaporation at the heights higher temperatures, the converse is true for barrels at a lower level making for many variations barrel to barrel. Windows, air circulation, light, and rackhouse location will all cause variables in the barrels contained within. Typically producers will blend barrels from various locations to achieve the desired character. (Spirits/Production)