An 18-inch stainless steel dishwasher can make a small kitchen more useful without taking up the space of a full-width model. The best fit depends on more than the exterior finish: check the opening dimensions, rack layout, drying options, noise level, and cycle selection before you buy. The five models below offer different strengths, from a quiet operation and a third rack to adjustable loading and heated drying.
Quick Comparison
| Dishwasher | Capacity | Standout features | Best for |
|---|---|---|---|
| COMFEE’ 18-Inch Built-In Dishwasher | 8 place settings | Adjustable upper rack, heated dry, sanitize function | Flexible loading and extra wash options |
| Sharp SDW4523MS 18-Inch Dishwasher | 8 place settings | Third rack, 47 dB operation, independent wash zones | Quiet operation and organized flatware storage |
| SPT SD-9254SSB Built-In Dishwasher | 8 place settings | Six wash programs, heated drying, ENERGY STAR | A straightforward cycle selection |
| Avanti 18-Inch Dishwasher | 8 place settings | Six automatic cycles, delay start, half-load mode | Extra cycle options and flexible scheduling |
| Forno Polo 18-Inch Dishwasher | 8 place settings | Adjustable upper rack, heated drying, 52 dBa operation | Flexible loading in a compact footprint |
Our Picks: Best 18 In Dishwasher Stainless Steel reviews
COMFEE’ 18-Inch Built-In Dishwasher: Best for Adjustable Loading
This COMFEE’ built-in model combines an 18-inch footprint with room for eight place settings. Its listed dimensions are 22.6 inches deep, 17.6 inches wide, and 32.4 inches high, with adjustable legs. Measure your cabinet opening carefully, including the available depth and height, before choosing it.
The upper rack adjusts by up to 1.97 inches to make room for taller cookware. The lower rack is described as accommodating dishware up to 13.78 inches high, which may help when you regularly wash large plates or pots. Six cycles cover heavy, normal, eco, delicate, quick, and rinse needs. Heated dry, hi-temp, and sanitize functions add flexibility, though heated dry is not available on the Rapid and Self-Clean cycles.
Its range of loading adjustments and wash functions makes it a strong option for households that use a mix of cookware and everyday dishes. The listed stainless steel tub and ENERGY STAR and NSF descriptions are additional points to compare when narrowing your choices. One practical drawback is that the product information does not give a noise level, so it is harder to compare its operating sound with the Sharp or Forno models.
Pros:
- Adjustable upper rack helps make room for taller items.
- Six cycles cover several common dishwashing needs.
- Heated dry, hi-temp, and sanitize functions provide added options.
- Listed with a stainless steel tub and eight-place-setting capacity.
Cons:
- No operating noise level is provided in the supplied product details.
- Heated dry is not offered on every cycle.
Verdict: Choose the COMFEE’ if adjustable loading and a broad set of wash functions matter more to you than having a published noise level.
Sharp SDW4523MS: Best for Quiet Operation and a Third Rack
The Sharp SDW4523MS is an 18-inch built-in dishwasher with room for eight place settings. Its listed 47 dB noise level is the lowest figure among the models in this comparison, which makes it worth considering if you want a quieter kitchen while a cycle runs.
A third rack provides a separate place for flatware and serving utensils, while the stainless steel interior and fingerprint-resistant exterior finish give the design practical appeal. The dishwasher has six cycles and four options, with smart sensors intended to adjust cleaning performance. Its wash-zone feature lets you run the upper or lower rack independently for smaller loads, a useful choice when you do not have enough dishes for a full load.
The third rack and wash zones distinguish this model from simpler two-rack designs. However, the supplied details do not list the dishwasher’s dimensions, so verify the exact installation requirements before ordering. It also does not specify a heated-dry feature, unlike several competing models in this group.
Pros:
- Listed at 47 dB for quiet operation.
- Third rack adds dedicated space for flatware and serving utensils.
- Independent upper- or lower-rack wash zones can suit smaller loads.
- Fingerprint-resistant exterior finish and backlit touch controls.
Cons:
- Dimensions are not included in the supplied product details.
- Heated drying is not listed among its features.
Verdict: The Sharp is a compelling choice if quiet operation, a third rack, and the option to wash one rack at a time are priorities.
SPT SD-9254SSB: Best for Simple Cycle Choices
The SPT SD-9254SSB is an 18-inch built-in dishwasher designed for eight place settings. Its listed features are relatively direct: six wash programs, a top-mounted control layout, and a heating function during the drying cycle. The cycle choices include normal, heavy, energy, glass, quick, and rinse.
This range gives you a clear way to match a cycle to the load, from glassware to heavily soiled dishes. The product is also described as ENERGY STAR, which may be useful to shoppers comparing energy-conscious options. The supplied details do not provide dimensions, noise information, or rack adjustments, so you will need to confirm installation fit and compare those practical details before deciding.
Compared with the Sharp, the SPT lists heated drying but does not mention a third rack or rack-specific wash zones. Compared with the COMFEE’ and Forno Polo, it gives less information about adjustable loading. Its appeal is a more straightforward set of listed functions rather than a long feature list.
Pros:
- Six programs include options for glassware, quick washing, and heavy loads.
- Heating function is listed for the drying cycle.
- Eight-place-setting capacity in an 18-inch built-in design.
- Described as ENERGY STAR.
Cons:
- Dimensions and operating noise level are not provided in the supplied details.
- Rack adjustments and specialty loading features are not listed.
Verdict: Consider the SPT if you want a compact built-in with a practical six-program lineup and heated drying, and can confirm the installation details separately.
Avanti 18-Inch Dishwasher: Best for Cycle Variety
The Avanti is a stainless steel built-in dishwasher with space for up to eight standard place settings. Its listed dimensions are 24.25 inches deep, 17.75 inches wide, and 32.25 inches high. Those measurements can help you compare it with your cabinet opening, but allow for the installation clearances required by the manufacturer.
It offers six automatic cycles: regular, automatic, super, intensive, delicate, and rinse. Three additional options—hi-temp wash, sanitize, and extra dry—give you more ways to tailor a load. A delay start and eco half-load mode add scheduling and smaller-load choices. The listed 53 dB operating level gives you a useful sound comparison with the quieter Sharp and Forno models.
The top electronic control panel has an LED display and cycle status indicators. A silverware basket, cup tray, and nylon-coated racks round out the loading features. Its cycle range is a plus, but the supplied details do not mention an adjustable upper rack or a third rack, so it may offer less loading flexibility for unusually tall items or extra flatware.
Pros:
- Six automatic cycles plus three additional wash options.
- Delay start and eco half-load mode support flexible use.
- Dimensions and 53 dB noise level are provided for comparison.
- Includes a silverware basket and cup tray.
Cons:
- Listed operating noise is higher than the Sharp and Forno models.
- An adjustable upper rack or third rack is not listed.
Verdict: The Avanti suits shoppers who value a broad selection of cycles and options and want published dimensions for planning a built-in installation.
Forno Polo 18-Inch Dishwasher: Best for Flexible Racking
The Forno Polo is listed as an 18-inch stainless steel dishwasher with a tall tub and capacity for eight place settings. Its two-rack layout includes an adjustable upper rack, described as making room for items up to 11 inches tall. Foldable tines in the lower rack can help when you need space for larger or less regularly shaped cookware.
Six wash programs include heavy, normal, and quick wash, and the built-in soil sensor is described as optimizing wash performance. Heated drying is listed for use with rinse aid. The dishwasher also includes a 24-hour delay start, a child lock, and an ADA-compliant design. Its listed operating level is 52 dBa.
The adjustable rack and foldable tines give this model useful loading flexibility, while the noise figure places it between the Sharp and Avanti in this group. The supplied description does not include installation dimensions, so check the product specifications and your cabinet opening before purchase. It also does not list a third rack or a separate sanitize function.
Pros:
- Adjustable upper rack and foldable lower-rack tines help accommodate varied loads.
- Heated drying is available when used with rinse aid.
- Includes a 24-hour delay start and child lock.
- Listed at 52 dBa and designed for eight place settings.
Cons:
- Installation dimensions are not included in the supplied details.
- A third rack and sanitize cycle are not listed.
Verdict: Pick the Forno Polo if adjustable racks, foldable tines, and heated drying are more useful to you than a third rack or published installation dimensions.
How to Choose an 18-Inch Stainless Steel Dishwasher
Measure the Opening and Check Installation Needs
An 18-inch label describes the general width class, not the full space the appliance needs. Measure the cabinet opening for width, height, and depth, and check the manufacturer’s installation requirements before ordering. Among these options, the COMFEE’ and Avanti listings provide dimensions; the supplied details for the other models do not. Also confirm any plumbing, electrical, and mounting requirements with the installation guide or a qualified installer.
Match Capacity to Your Household
Each model in this comparison is listed for eight place settings, but rack layouts and interior dimensions affect how useful that capacity feels in daily use. If you wash pots, oversized plates, or tall glasses often, look for rack adjustments and clearances. The COMFEE’ describes an adjustable upper rack and room for large dishware, while the Forno Polo lists an adjustable upper rack and foldable lower-rack tines.
Compare Rack Layouts and Loading Flexibility
A third rack can provide a separate spot for flatware and serving utensils, as it does on the Sharp. An adjustable upper rack can help make space for taller cookware, while foldable tines can make the lower rack easier to load with irregular items. Consider the dishes you use most, rather than choosing based on rack count alone.
Look at the Cycles and Extra Options
Common cycles such as normal, heavy, quick, and rinse cover many everyday loads. Specialized choices may matter if you regularly wash delicate glassware or want a high-temperature or sanitize function. The COMFEE’ lists hi-temp and sanitize functions; the Avanti lists hi-temp wash, sanitize, and extra dry options. Compare the full cycle list and note which options work with which cycles.
Decide How Important Drying Is
Drying features vary across these models. The COMFEE’ and Forno Polo list heated drying, and the SPT lists a heating function during its drying cycle. The Avanti lists an extra-dry option. The Sharp product details provided here do not specify a drying feature. If dry dishes straight from the cycle matter to you, confirm the exact drying method and any need for rinse aid before buying.
Consider Noise and Smaller Loads
When a kitchen is near a living area, operating noise may influence your choice. The Sharp is listed at 47 dB, the Forno at 52 dBa, and the Avanti at 53 dB; comparable figures are not provided for the COMFEE’ or SPT. The Sharp also lists independent rack wash zones, while the Avanti offers an eco half-load mode. Check the operating instructions to understand how these features work and when they are available.
Check the Finish and Interior Materials
Stainless steel can describe the exterior finish, the interior tub, or both, so read the product details closely. The COMFEE’ listing specifies a stainless steel tub, and the Sharp lists a stainless steel interior plus a fingerprint-resistant exterior finish. The Forno Polo is described as having a stainless steel tall tub. Confirm the material details for the model you choose, especially if interior construction is important to you.
Frequently Asked Questions
Will an 18-inch dishwasher fit in any 18-inch cabinet opening?
Not necessarily. The listed width class does not confirm the full installation fit. Measure the opening and compare it with the manufacturer’s dimensions and clearance requirements before purchase.
How many place settings do these models hold?
All five models in this comparison are listed for eight place settings. The amount you can load in practice depends on dish size, rack layout, and the cookware you wash.
Which model is listed as the quietest?
The Sharp SDW4523MS is listed at 47 dB, the lowest published noise figure among the models here. Noise information is not provided for every dishwasher, so this is a comparison of the figures available in the supplied product details.
Which dishwashers list heated drying?
The COMFEE’ lists heated dry, the SPT lists a heating function during drying, and the Forno Polo lists heated drying for use with rinse aid. The Avanti lists an extra-dry option. The Sharp’s supplied details do not specify a drying feature.
Which model has a third rack?
The Sharp SDW4523MS is the only model in this comparison that specifically lists a third rack. It is intended to provide space for flatware and serving utensils.
Can I use regular liquid dish soap in these machines?
No. The COMFEE’ product information specifically advises using detergent made for dishwashers and warns against regular liquid dish soap. Follow the detergent instructions for the model you select.
Which dishwasher is the best overall choice?
There is no single best fit for every kitchen. The Sharp stands out for its listed noise level and third rack, while the COMFEE’ offers several wash functions and adjustable loading. Prioritize the features you will use and verify fit before choosing.
Final Recommendation
For a quiet operation and a third rack, the Sharp SDW4523MS is the clearest match based on the supplied specifications. If you want more flexibility for tall cookware and a wider range of wash functions, compare the COMFEE’ and Forno Polo. The SPT and Avanti offer straightforward alternatives with useful cycle selections. Before you buy, measure your space and confirm the product’s current specifications and installation requirements.