No, you can’t install just any microwave over your range. You have to get a specific type of microwave known as an over-the-range unit. These include venting and lighting features that you’ll need above your stovetop. 

Although countertop units are more affordable, they won’t work for this type of installation. To avoid hazardous conditions in your kitchen, buy the right type of microwave for your needs.

No, range hoods do not necessarily have to be vented outside. Ductless or non-vented range hoods are available, which are common in condos or small kitchens where connecting to external ductwork isn't feasible. These hoods operate by taking in air, filtering it through charcoal filters to help eliminate smoke and odors, and then recirculating the cleaned air back into the kitchen. However, while these recirculating hoods are more versatile, venting to the outside is still the preferred and more effective method for completely removing smoke, odors, and gases from the room.

A range hood is an exhaust fan for your kitchen, and several types and styles exist. They are meant to remove grease, moisture, and fumes from your stove. Although some models filter and recirculate the air, the most effective ones remove the air through a duct that’s vented to the outdoors.

If a range hood has minor issues, the average repair costs $85 to $210. This accounts for both parts and labor. More extensive damage can cost as much as $300 to $500, at which point it may be worth considering completely replacing the range hood.