Finding the best built-in microwave for a 27-inch cabinet opening starts with checking more than the trim width. You also need to match the microwave and trim kit, confirm the required cutout height and depth, and make sure the finished unit has room to vent. Of these options, the Summit is the clearest all-in-one choice because its dedicated 27-inch trim kit is included. The Frigidaire offers a large oven, but its trim kit is sold separately; the other three products are trim kits only, not microwaves.
Quick Comparison
| Product | What’s included | Key fit or capacity details | Best for |
|---|---|---|---|
| Frigidaire Gallery GMBS3068BF | Microwave; trim kit sold separately | 2.2 cu. ft.; microwave cutout: 24 3/4″W x 20″D x 16 3/4″H | A roomy microwave if you can confirm the right trim kit |
| Summit SMBI27TK27 | Microwave and dedicated 27-inch trim kit | 2.2 cu. ft.; recommended cutout: 25.5″W x 22.75″D x 17.13″H | A matched microwave-and-trim package |
| GMTK2768AF-Compatible Trim Kit | Trim kit only | For listed GMBS3068AF applications; cutout: 24 3/4–25″W x at least 20″D x 16 3/4–17″H | Replacing or adding a specified Frigidaire Gallery trim kit |
| jencbal 27-Inch Trim Kit | Trim kit only | Listed for GMBS3068AF | A stainless-steel trim-kit option for the listed model |
| XIDAUS GMTK2768AF Trim Kit | Trim kit only | Listed as compatible with Gallery GMBS3068AF | A trim-kit replacement with installation components included |
Our Picks: Best Built In Microwave For 27 Inch Cabinet reviews
Best Large-Capacity Microwave If You Confirm the Trim Kit: Frigidaire Gallery GMBS3068BF
The Frigidaire Gallery GMBS3068BF is a 2.2-cubic-foot built-in microwave with a stainless-steel interior and an 1,100-watt cooking output. Its listed dimensions are 24 7/16 inches wide, 19 5/8 inches deep, and 13 5/8 inches high. The microwave itself is not 27 inches wide; a separate trim kit is intended to finish the installation in a wider cabinet opening.
Sensor cooking and sensor reheating adjust cooking time and power for the selected task. The controls also offer quick start, auto defrost, 11 power levels, a timer, and a child safety lock. That combination makes it a practical choice for households that want a larger interior and everyday cooking assistance rather than a basic countertop-style control set.
The main catch is fit. The supplied product details list a required microwave cutout of 24 3/4 inches wide, 20 inches deep, and 16 3/4 inches high, and say a 27-inch trim kit is available separately. However, the included trim-kit information refers to GMTK2768AF and GMBS3068AF, while this microwave is model GMBS3068BF. Confirm compatibility with the manufacturer or seller before ordering; matching the cabinet width alone does not settle the model-fit question.
Pros:
- Large 2.2-cubic-foot capacity for roomy dishes and multiple items.
- Sensor cook and reheat programs help simplify common tasks.
- Stainless-steel interior and 1,100-watt output.
- Offers a separate 27-inch trim-kit option, subject to model compatibility.
Cons:
- The trim kit is sold separately.
- Verify the BF-to-AF model compatibility before buying a trim kit.
Verdict: Choose the Frigidaire for its roomy, sensor-equipped microwave if you can confirm the correct 27-inch trim kit for the exact GMBS3068BF model.
Best Complete 27-Inch Package: Summit SMBI27TK27
The Summit SMBI27TK27 is the most straightforward option when you want the microwave and trim kit together. It includes a dedicated stainless-steel trim kit with the frame, rails, and bottom ducts, and is designed for a 27-inch-wide cabinet opening or installation above a wall oven. The trim-and-microwave unit measures 26.88 inches wide, 18.88 inches high, and 19.63 inches deep.
Inside, it offers 2.2 cubic feet of capacity, a removable glass turntable, and 1,200 watts of cooking power. Its digital controls include sensor cooking, auto defrost by weight or time, multi-stage programming, one-touch presets, and a +30-second button. The child safety lock and end-of-cycle buzzer add useful everyday details.
Its main advantage over the Frigidaire is the included, purpose-matched trim kit, which removes the need to source that part separately. Still, the stated 27-inch cabinet opening does not mean every opening will fit. Summit recommends a cutout measuring 25.5 inches wide, 22.75 inches deep, and 17.13 inches high. Measure the actual opening and check clearances before purchasing. At 75 pounds, the unit may also take careful handling during installation.
Pros:
- Microwave and dedicated 27-inch trim kit are included together.
- Large 2.2-cubic-foot interior and 1,200-watt output.
- Sensor cooking, multi-stage programming, and several one-touch controls.
- Designed for a 27-inch cabinet opening or placement over a wall oven.
Cons:
- Requires a deeper recommended cutout than the listed Frigidaire microwave.
- The 75-pound weight may make handling and installation more demanding.
Verdict: The Summit is the strongest starting point if you want a complete microwave-and-trim-kit package, provided your cabinet meets its cutout requirements.
Best Specified Replacement Kit: GMTK2768AF-Compatible Trim Kit
This product is a trim kit, not a microwave. It is listed for GMTK2768AF applications and as compatible with the Frigidaire Gallery GMBS3068AF 2.2-cubic-foot built-in microwave. The package description says it includes a front frame assembly, exhaust duct, two mounting rails, and installation screws.
The listed cabinet cutout range is 24 3/4 to 25 inches wide, 16 3/4 to 17 inches high, and at least 20 inches deep. Those measurements are useful when planning an installation, but the exact microwave model matters just as much. In particular, this product’s compatibility information names GMBS3068AF; it does not establish that it fits the GMBS3068BF microwave in our first pick.
The stainless-steel frame is intended to provide a finished border around a compatible microwave. Since this listing describes a third-party kit, confirm the fit, included parts, and installation instructions before relying on it for a built-in project. If you do not already own the specified microwave, you will need to buy one separately.
Pros:
- Lists a specific Frigidaire Gallery microwave model for compatibility.
- Includes the frame, exhaust duct, mounting rails, and screws.
- Provides cutout dimensions to compare with your cabinet opening.
Cons:
- Trim kit only; the microwave is not included.
- Compatibility details name GMBS3068AF, so check carefully before pairing it with another model.
Verdict: Consider this kit only if you have verified that your exact microwave is among its compatible models and your cutout matches the listed dimensions.
Alternative Stainless-Steel Trim Kit for GMBS3068AF: jencbal
The jencbal listing is another trim-kit-only option, described for the GMBS3068AF and a 27-inch built-in installation. Its stated components include a front frame assembly, exhaust duct, two bottom mounting rails, and screws. The maker describes the stainless-steel finish as resistant to fingerprints and stains, though the most important thing to confirm is still whether the kit matches your microwave and cabinet.
The product details list a frame measuring 27 inches wide and 18 inches high. That is the trim kit’s size, not a substitute for the microwave’s required cutout measurements. Before ordering, compare the kit’s model compatibility with the label on your microwave and ask the seller for any missing installation dimensions or instructions.
Because this is an accessory rather than a complete appliance, it makes the most sense for someone who already owns the specified microwave and needs a trim frame. It is not a solution for shoppers who still need to buy the microwave itself.
Pros:
- Listed for the Frigidaire Gallery GMBS3068AF.
- Includes the frame, exhaust duct, mounting rails, and screws.
- Stainless-steel finish is intended to coordinate with kitchen appliances.
Cons:
- Does not include a microwave.
- The provided details do not give a full cabinet cutout specification.
Verdict: This is a possible trim replacement for a confirmed GMBS3068AF installation, but get exact fit details before ordering.
Trim Kit with Installation Hardware: XIDAUS GMTK2768AF
The XIDAUS GMTK2768AF is a stainless-steel trim kit listed for the Gallery GMBS3068AF 2.2-cubic-foot microwave. It is not an oven. The package description lists a front frame assembly, exhaust duct, two mounting rails, and screws, so it is intended to provide the main pieces needed for a built-in trim installation.
The kit is listed as 27 inches wide and 18 inches high, with a depth of 1.57 inches. Its listed two-year warranty is a useful point to check against the seller’s current terms. As with the other third-party kits here, confirm that your microwave’s full model number matches the compatibility information; do not assume that similar model numbers use interchangeable trim.
This option may suit an owner of the specified Frigidaire Gallery model who wants a replacement or matching frame. The supplied product details do not state a full cabinet cutout range, so you may need to confirm those measurements before planning the installation.
Pros:
- Listed as compatible with the Gallery GMBS3068AF.
- Includes the frame, exhaust duct, rails, and screws.
- Stainless-steel construction and a listed two-year warranty.
Cons:
- Trim kit only; microwave must be purchased separately.
- Full cabinet cutout dimensions are not provided in the supplied details.
Verdict: The XIDAUS kit is worth considering as an accessory for a confirmed GMBS3068AF, but it is not a complete built-in microwave purchase.
How to Choose a Built-In Microwave for a 27-Inch Cabinet
Measure the cabinet opening, not just the cabinet width
A “27-inch cabinet” may describe the cabinet’s nominal size, not the open space available for the appliance. Measure the opening’s inside width, height, and depth. Then compare those numbers with the microwave’s required cutout and the trim kit’s installation specifications. The Summit, for example, lists a recommended cutout of 25.5 inches wide, 22.75 inches deep, and 17.13 inches high. The Frigidaire lists a different microwave cutout: 24 3/4 inches wide, 20 inches deep, and 16 3/4 inches high.
Match the trim kit to the exact microwave model
Trim kits are not automatically interchangeable just because they are the same width or look similar. Check the complete model number on the microwave and compare it with the trim kit’s compatibility list. This matters for the Frigidaire picks here: the microwave is identified as GMBS3068BF, while the separate trim-kit listings refer to GMBS3068AF. Confirm compatibility before buying either part.
Check what the package actually includes
Some listings are for a microwave with a separately sold trim kit, some include both, and some are for the trim kit alone. The Summit includes its dedicated trim kit. The Frigidaire microwave does not. The final three choices in this guide are accessories and do not include an oven. Confirm the package contents so you do not end up with a frame when you still need a microwave.
Allow for depth and installation clearance
Depth can be the limiting measurement, especially in a shallow cabinet or above another appliance. Compare the stated cutout depth with the usable space behind the cabinet face, and follow the installation instructions for required clearance and ventilation. Do not rely on the microwave’s body depth alone: the trim kit, ducts, and mounting setup can affect the space needed.
Choose capacity and controls for your cooking habits
The Frigidaire and Summit both offer 2.2 cubic feet of interior capacity, but their listed power and controls differ. The Frigidaire has 1,100 watts and sensor cook and reheat programs. The Summit has 1,200 watts, sensor cooking, multi-stage programming, and one-touch presets. Consider the dishes you use most and whether those controls are useful to you, rather than choosing by capacity alone.
Plan for a secure installation
A built-in microwave and trim kit need to be installed as a matched system according to the product instructions. Check whether the package includes rails, ducts, screws, and a frame, and consider the appliance’s weight. The Summit is listed at 75 pounds, so plan for safe handling. If you are unsure about cabinet support, electrical requirements, or installation steps, consult a qualified installer.
Frequently Asked Questions
Does a 27-inch cabinet require a 27-inch-wide microwave?
No. The cabinet opening and the microwave body are different measurements. A trim kit can cover the gap around a narrower microwave and create a finished built-in appearance. Use the required cutout dimensions and trim-kit specifications to check fit.
Which option includes both the microwave and the trim kit?
The Summit SMBI27TK27 listing includes a microwave and its dedicated stainless-steel trim kit. The Frigidaire GMBS3068BF is a microwave with its trim kit sold separately. The other three products listed here are trim kits only.
Will the GMTK2768AF kits fit the Frigidaire GMBS3068BF?
The supplied kit details name the GMBS3068AF, while the Frigidaire microwave in this guide is model GMBS3068BF. The information provided does not confirm that the AF kits fit the BF microwave. Verify the complete model number and compatibility with the manufacturer or seller before ordering.
Is the Summit microwave a good fit for every 27-inch cabinet?
Not necessarily. Although it is designed for a 27-inch cabinet opening, Summit recommends a cutout of 25.5 inches wide, 22.75 inches deep, and 17.13 inches high. Measure your actual opening and confirm the installation instructions before buying.
Are the trim kits standalone microwaves?
No. The GMTK2768AF-compatible kit, jencbal kit, and XIDAUS kit are accessories. Each requires a compatible microwave, which is not included with those products.
Should I choose a microwave based on the trim kit’s outside width?
No. The trim kit’s outside width helps create the finished look, but the cabinet cutout, microwave body, and installation clearances all matter. Check every measurement and model number before making a decision.
Final Recommendation
For the simplest purchase path, the Summit SMBI27TK27 stands out because it includes both the microwave and a dedicated 27-inch trim kit. The Frigidaire Gallery GMBS3068BF is a strong alternative if you want its 2.2-cubic-foot interior and sensor functions, but confirm the correct trim-kit match before ordering. If you already own a compatible GMBS3068AF, one of the separately sold trim kits may suit your installation; these accessories are not substitutes for a microwave.
