Too Shallow? The Truth About 12-Inch Over-the-Range Microwave Ovens

Over-the-range microwave ovens are a popular choice for many homeowners looking to maximize kitchen space. Mounted above the stove or range, these microwaves take advantage of unused area and free up precious countertop real estate. Most standard over-the-range models have a depth around 15 to 16 inches - allowing for sufficient interior capacity and relatively straightforward installation.

But what about more compact over-the-range microwaves with a 12 inch depth? While less common, these shallower microwaves do exist.

Typical OTR Microwave Sizes

The majority of over-the-range microwave ovens available today have depths ranging from around 15 to 16 inches. This typical size provides ample interior room to accommodate most plates, cookware, and foods. The extra depth also allows the microwave ventilation system to extend properly to the exterior ductwork in most standard installations.

In contrast, 12 inch depth over-the-range microwave ovens are less prevalent. There are fewer models available at this shallower size. However, some brands like Sharp, GE, and Frigidaire do offer select 12 inch depth options.

Why Consider a 12 Inch Depth Model?

So why would a homeowner choose one of the less common 12 inch depth over-the-range microwave ovens? There are a few potential advantages to going with a shallower model:

• A smaller overall footprint leaves more usable space above the range and provides a less obstructed kitchen aesthetic.
• In compact, galley, or apartment kitchens, a 12 inch microwave can fit where a bulkier 15-16 inch one will not.
• The reduced depth may allow for fully opening cabinet doors above the microwave that would otherwise hit a deeper model.

For these reasons, the 12 inch depth over-the-range microwave does have a niche appeal. It creates a shallow profile that can be perfect for kitchens short on square footage.

Drawbacks and Considerations of 12 Inch Microwaves

However, going with one of the less common 12 inch OTR microwaves also comes with some potential drawbacks and installation considerations:

• The shallower size results in reduced interior capacity and space.
• Ventilation ductwork may be more difficult compared to standard depth microwaves.
• Pre-drilled cabinet holes above the range may no longer line up properly with a 12 inch unit.
• Doors on upper cabinets that open toward the microwave may still hit the front when opened fully.

With any specialty home appliance like this, extra planning and preparation is required before purchasing and installing a 12 inch over-the-range microwave.

Installation and Fit Issues

One of the first issues that may arise with a 12 inch depth over-the-range microwave is improper alignment with pre-drilled cabinet holes above the range intended for installation. Since most standard OTR microwaves are 15-16 inches deep, these existing holes likely will not match up properly with a shallower 12 inch unit.

Some alteration or drilling of new mounting holes will likely be required. Carefully checking the manufacturer's installation instructions is advised. You may also need to add supplemental support structures inside the upper cabinet to firmly secure the smaller microwave.

It's critical to confirm that there is adequate clearance between the top of the microwave and the bottom of the cabinets. Most manufacturers recommend at least 2 inches of space. This clearance allows proper airflow and reduces the risk of heat damage.

Venting a 12 Inch Microwave

Another factor to assess is the ductwork and venting for a 12 inch over-the-range microwave. Most standard installations involve ductwork extending from the rear of the microwave to an exterior-facing vent. This duct run may be more challenging and require an extension piece with a more shallow microwave.

Some brands sell specific venting kits for compact microwave installations. You may need an adjustable elbow or adapter accessory to connect the smaller microwave vent to existing ductwork leading outside.

No matter what, proper ventilation remains a must. Make sure the microwave's overhead exhaust fan will still be able to effectively evacuate heat, steam, and fumes from cooking on the range below.

Available Brands and Models

Currently, there are just a handful of appliance manufacturers producing 12 inch depth over-the-range microwaves. Sharp, GE, and Frigidaire lead the pack in offering some compact models at this size.

It's important to closely compare the internal capacity between different 12 inch microwaves. While shallow, some models can hold over 1 cubic foot while other units may be closer to 0.7 cubic feet. Look for the manufacturer specifications listed online or on the packaging.

Also be mindful of the needed mounting height, weight limits, and measurement of any projection out from the wall. Not all spaces and cabinets can accommodate a built-in microwave, even small ones.

Alternatives for Narrow Cabinet Spaces

If your upper cabinets run shallow and a 12 inch over-the-range microwave still won't fit, there are a couple alternative options to think about:

• Install an independent, wall-mounted microwave instead of a built-in above the range. This frees up needed depth.
• Use risers or spacers to reduce the amount of required space behind the microwave.
• Carefully measure the depth of your current cabinets before committing to any new appliance.

With some creativity, you can often find a microwave solution even for the narrowest of kitchen cabinets. An experienced kitchen contractor can suggest more custom ideas as well.

Final Considerations Before Buying

Here are a few last tips if you're interested in purchasing a 12 inch depth over-the-range microwave:

• Physically measure your existing cabinet depth and layout to confirm a good fit.
• Inspect the current venting situation above your range.
• Compare microwave capacity, ratings, features, and dimensions carefully.
• Consult manufacturer specs online or reach out for guidance.

While limited, 12 inch over-the-range microwaves can be a great solution for truly compact kitchen spaces. With good planning and preparation, you can determine if this specialty small appliance is right for your home.

Over-the-range microwaves with a 12 inch depth are certainly less common than the standard 15-16 inch size models. But for some homeowners, the shallower small appliance provides needed space savings above their range.

While the compact size leads to reduced capacity and trickier installations, 12 inch OTR microwaves do add a streamlined look in tight kitchens. With careful shopping and planning, these microwaves can become a workable option worth considering.