24 Ceiling Fan With Light, The average nail-on plastic ceiling box is rated for only supporting a 35 pound static load. They are also not fan-rated. This requires that the ceiling box be replaced with a fan-rated box before the installation of a ceiling fan. Fan-rated boxes are capable of holding 70 pound loads and are rated for this application. This is easier said than done! The nail-on products do not lend themselves to be reinforced easily since labor savings have also been applied to the construction of homes themselves. In many circumstance the average home does not have an attic, only a narrow crawl space between the trusses is provided. This combined with blow-in insulation makes the location of the ceiling box difficult if not impossible when a fan is to be hung on an upper floor.
For installation of a ceiling fan between floors leaves little choice for this task since it cannot be accessed easily from above or below the ceiling since the upper floor is directly above the ceiling box.24 Ceiling Fan With Light Cutting a hole in the floor or knocking out the ceiling is not prudent just to place blocking above a ceiling box. Medallions are available but the added expense, labor and time can be prohibitive, especially if the medallion is painted to match the ceiling. The brace type of products that are sold today are an alternative though they work better in theory than in practice as the old ceiling box needs to be removed before they can be installed. Home Depot has a web page devoted to this process which they claim can take ½ a day to complete.