When a microwave is replacing a standard range hood it is usually best to use the existing venting method.
Can all over the range microwaves vent outside.
All over the range spacemaker microwaves can be vented to the outside using an equivalent total of 140 feet of rigid 3 1 4 x 10 rectangular or rigid 6 round ducting.
For this reason vent ducts are the only choice.
Over the range microwaves have a light and fan built into the bottom of the appliance.
In the first example the microwave over the range otr will vent through the manufacturer installed grease or carbon filter then directly through an exhaust port that is ducted to the outside of the structure.
Microwaves are shipped from the factory to vent out the top vertically but can also be vented out the rear horizontally.
This eliminates smoke cooking odors moisture and hot air from remaining in the kitchen.
Ultimately the goal of the vent is to pull the air from the microwave and deposit it to the outside.
After the smoke and steam are removed the filtered fan vents the air outside your home or cleans it before releasing it back into the kitchen.
Microwaves that vent to the outside force the air through duct work to the outdoors.
Many times an over the range microwave that recirculates cooking fumes can be converted to exhaust to the outside.
Microwaves over the range otr typically vent in two different ways.
Remove the access plate on the top of the unit in order to reach the motor.
Over the range microwaves can vent to the outside or can recirculate the air.
Typically there might be a cabinet installed over the microwave and inside that cabinet will be duct work or a soffit above the microwave or a direct wall exhaust.