While it is possible for a homeowner to install a vented range hood himself, many of the retailers that sell them offer installation as an additional service. People who lack the expertise to perform the installation often opt to have a professional complete the process.
This Old House's website offers step-by-step directions for installing a vented range hood, beginning with making the hole above the range, moving on to create the mounting plate, attaching the pipes or ducts that take the smoke and other odors away from the range, sliding the hood into place and hooking up the electrical connections. However, the prospect of cutting into walls and coming into contact with electrical wiring is intimidating to many homeowners, particularly because making cutting mistakes can cause aesthetic problems in the kitchen. In this case, many people prefer to use a professional instead.
Many retailers, such as Lowe's, offer installation as an optional service when selling appliances such as vented range hoods. The sales associate can provide a quote for the cost of the installation at the same time as the sale of the oven, which means that the consumer can walk out the door having purchased the over-the-range microwave (or just the hood) with a scheduled installation time.