How to Replace an Over-the-Range Microwave with a Proper Range Hood 

Replacing an over-the-range (OTR) microwave with a dedicated range hood is one of the most impactful upgrades you can make for your kitchen’s air quality. While there are many factors to consider when choosing the right range hood, the actual replacement process is more straightforward than many homeowners expect.
Below is a practical, step-by-step overview to help you confidently remove your OTR microwave and install a proper range hood in its place.

Learn why this upgrade matters here, “Range Hood vs Over-the-Range Microwave: Why Proper Ventilation Matters”

Step-by-Step: Replacing an OTR Microwave with a Range Hood

1. Measure the width of your OTR microwave

Most over-the-range microwaves are 30 inches wide. This measurement is important because your new range hood should match the width of the existing opening for proper coverage and visual alignment.

2. Consider your cooking style and required CFM

Your cooking habits directly affect how much airflow your new range hood needs.

• If you use a gas cooktop or cook frequently with high heat, plan for a minimum of 300 CFM.
• If you use professional-style appliances or cook aggressively with searing and frying, consider a hood rated at 600 CFM or more.

Learn how airflow is measured here, “Range Hood CFM Guide: How to Choose the Right Power for Your Kitchen”

3. Choose the right under-cabinet range hood

When selecting your replacement hood, make sure it meets the following criteria:

• Matches the width of your OTR microwave
• Extends at least 18 inches deep from back to front for proper capture
• Is performance certified by the Home Ventilating Institute (HVI)

HVI certification ensures the airflow and sound ratings you see are independently verified and reliable.

4. Unplug the OTR microwave

Before beginning removal, unplug the microwave from the wall outlet to eliminate any electrical risk.
 

5. Protect surfaces below the microwave

Cover your cooktop and countertops with cardboard or drop cloths. This protects surfaces from scratches or damage during removal.
 

6. Disconnect the ducting (if applicable)

If your OTR microwave is ducted through the top, remove the tape securing the duct to the microwave’s duct adapter. Set the ducting aside carefully.
 

7. Remove the support screws

Most OTR microwaves are secured to the cabinet above with two support screws.

• Have a second person support the microwave from below.
• Remove both screws while the second person maintains upward pressure.

Do not worry about the microwave falling. A wall-mounted bracket supports the back of the unit.
  8. Disengage the microwave from the wall bracket
With two people supporting the unit, tilt the front of the microwave downward while lifting the back upward. This motion releases the microwave from the wall bracket. Set it down on a protected surface.


9. Remove the wall mounting bracket
Once the microwave is removed, take down the wall bracket and repair the screw holes as needed.
  10. Install the new range hood
With the area clear, install your new range hood using the manufacturer’s instructions. Many modern range hoods include simplified mounting systems that make installation faster and more precise.

Why This Upgrade Is Worth It

Replacing an OTR microwave with a dedicated range hood dramatically improves capture efficiency, airflow, and indoor air quality. It also reduces lingering odors, grease buildup, and moisture damage throughout the kitchen.

If you make this change, you are investing in a healthier, safer, and more enjoyable cooking environment for you and your family.