Both the COSMO COS-30EDWC and the Samsung NV51K6650DG/AA are 30-inch electric convection double wall ovens that install flush into a standard cabinet cutout. The COSMO lists at $1,889.99 while the Samsung comes in roughly $800 less at $1,099. Despite the big price gap, their usable capacities land within a tenth of a cubic foot of each other: 5.0 cu ft for the COSMO versus 5.1 cu ft for the Samsung. Where they differ most is wattage, finish style, and the brand credibility each brings to a kitchen remodel.
The Samsung NV51K6650DG/AA wins for most buyers: it delivers nearly identical capacity and convection performance at a significantly lower price, and its 4.5-star rating edges out the COSMO's 4.0 stars.
| Spec | COSMO COS-30EDWC Double Wall Oven | Samsung NV51K6650DG/AA Double Wall Oven |
|---|---|---|
| Price | $1889.99 | $1099.00 |
| Rating | ||
| Capacity | 5.0 cu ft | 5.1 cu ft |
| Fuel type | Electric | Electric |
| Heating | Convection | Convection |
| Installation | Built-In Wall | Built-In |
| Width | 30.0 in | 29.88 in |
| Finish | Stainless Steel | Stainless Steel |
| Color | Stainless Steel | Black Stainless Steel |
| Dimensions | 23.5 X 29.87 X 51.18 In | 25.69 X 29.88 X 51.38 In |
| Weight | 236.5 lb | 260.0 lb |
| Voltage | 240 Volts | 240 |
The COSMO COS-30EDWC is a 30-inch built-in electric double wall oven rated at 4,800 watts and priced at $1,889.99. Its 5.0 cu ft combined capacity pairs with convection heating, and the stainless steel finish measures 23.5 x 29.87 x 51.18 inches with a 236.5 lb install weight. At 4.0 stars across 37 reviews it has a reasonable feedback base, though some buyers note the premium price relative to brand recognition. The 240-volt requirement is standard for double wall ovens in this class.
Buy this if: Choose the COSMO COS-30EDWC if you prefer a traditional stainless steel look and are already budgeted for a higher-priced unit. It is also a reasonable pick if you find it on sale and the lower wattage draw is a consideration for your electrical setup.
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The Samsung NV51K6650DG/AA is a 30-inch built-in electric convection double wall oven priced at $1,099. It edges out the COSMO on capacity at 5.1 cu ft and carries a 4.5-star rating, though from a smaller sample of 11 reviews. The black stainless steel color with a stainless finish gives it a distinctive look that suits modern kitchen designs. At 25.69 x 29.88 x 51.38 inches and 260 lb, it is slightly taller and heavier than the COSMO, which is worth noting if the cabinet opening has tight height clearance.
Buy this if: The Samsung NV51K6650DG/AA is the stronger choice for budget-conscious buyers who still want a name-brand convection double wall oven with a larger total capacity. Its black stainless steel finish also suits anyone updating to a contemporary kitchen color scheme.
Check price on AmazonYes. Both the COSMO COS-30EDWC and the Samsung NV51K6650DG/AA require a 240-volt dedicated circuit, which is standard for electric wall ovens in this class. If your kitchen currently has a 120-volt outlet at the wall oven location, you will need an electrician to run a new circuit before installation. Budget for that cost when comparing prices.
The Samsung NV51K6650DG/AA has a marginally larger combined capacity at 5.1 cu ft compared to the COSMO COS-30EDWC at 5.0 cu ft. In practical terms the difference is negligible for most cooking tasks. Both ovens fit a standard 30-inch cabinet cutout, so the usable interior space per cavity is very similar.
Based on the available spec data and ratings, the Samsung offers equal or better capacity at roughly $800 less. The COSMO's higher wattage at 4,800W could mean faster preheat times, but neither oven has sufficient review volume to declare a clear performance winner. Unless the COSMO is discounted significantly or you specifically need its finish style, the Samsung represents better value.
Both are designed for a standard 30-inch built-in wall installation. The COSMO is 29.87 inches wide and the Samsung is 29.88 inches wide, so both should drop into the same opening. Always confirm the height and depth clearances against your specific cabinet dimensions before ordering, since the Samsung stands about a quarter inch taller at 51.38 inches versus the COSMO at 51.18 inches.