If you are shopping for a built-in electric double wall oven under $2,300, the COSMO COS-30EDWC and the KoolMore KM-WO30D-SS cover the same basic territory but differ sharply on capacity, wattage, and cabinet width. The COSMO fits a standard 30-inch cutout and draws 4,800 watts across its two convection cavities, delivering a combined 5.0 cu ft of cooking space at $1,889.99. The KoolMore squeezes a much larger 10.0 cu ft combined capacity into a narrower 23.5-inch body at 8,500 watts and costs $2,203.90, about $314 more. Both run on 240-volt circuits, finish in stainless steel, and carry buyer ratings above 4.0 stars. The right pick comes down to your cabinet opening and how much oven space you actually need.
The KoolMore KM-WO30D-SS wins on capacity and wattage for cooks who need the room and have a 23.5-inch cutout; the COSMO COS-30EDWC is the better fit for standard 30-inch kitchens at a lower price.
| Spec | COSMO COS-30EDWC Double Wall Oven | KoolMore KM-WO30D-SS Double Wall Oven |
|---|---|---|
| Price | $1889.99 | $2203.90 |
| Rating | ||
| Capacity | 5.0 cu ft | 10.0 cu ft |
| Fuel type | Electric | Electric |
| Heating | Convection | Convection |
| Wattage | 4800 W | 8500 W |
| Installation | Built-In Wall | Built-In |
| Width | 30.0 in | 23.5 in |
| Finish | Stainless Steel | Stainless Steel |
| Color | Stainless Steel | Silver |
| Dimensions | 23.5 X 29.87 X 51.18 In | 23.5 X 23.5 X 51.2 In |
| Weight | 236.5 lb | 230.0 lb |
| Voltage | 240 Volts | 240 Volts |
The COSMO COS-30EDWC is a 30-inch wide built-in electric double wall oven priced at $1,889.99. Its convection heating spans a combined 5.0 cu ft across both cavities, which handles everyday family cooking without a problem. At 4,800 watts and 240 volts, it has enough power for baking and roasting without demanding anything beyond a standard double-oven electrical circuit. The unit weighs 236.5 lb and measures 23.5 x 29.87 x 51.18 inches, fitting the 30-inch cutouts found in most American kitchens. It holds a 4.0-star rating from 37 buyers, giving a reasonable real-world sample.
Buy this if: The COSMO COS-30EDWC is the right call if your kitchen has a standard 30-inch double-oven cutout and you want to stay below $1,900. It suits households that cook regularly but do not need to run two large roasting pans at the same time. If budget and a drop-in fit are the top priorities, the COSMO delivers both.
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The KoolMore KM-WO30D-SS is a 23.5-inch wide built-in electric double wall oven priced at $2,203.90. Its standout spec is a combined 10.0 cu ft capacity, double what the COSMO provides, making it one of the roomier options in this price range. The 8,500-watt draw is nearly twice the COSMO's, so it can preheat faster and recover heat more quickly after the door opens. It measures 23.5 x 23.5 x 51.2 inches and weighs 230 lb, slightly lighter than the COSMO despite the larger interior volume. Buyers give it a 4.2-star rating across 30 reviews, a small edge over the COSMO.
Buy this if: The KoolMore KM-WO30D-SS suits cooks who need serious oven real estate and have a 23.5-inch cutout or are remodeling and can size the cabinet to match. The 10.0 cu ft combined capacity is genuinely useful for holiday cooking, batch baking, or any household that runs both cavities at once on a regular basis. If you can absorb the extra $314 and the narrower width works for your space, the KoolMore gives you considerably more oven for the money.
Check price on AmazonNo. The COSMO COS-30EDWC requires a 30-inch wide opening, which is the standard wall-oven cutout in most American kitchens. The KoolMore KM-WO30D-SS needs a 23.5-inch wide opening, so it will not drop into a standard 30-inch cabinet without modification. Measure your existing cutout before ordering either unit.
The KoolMore KM-WO30D-SS has significantly more space at a combined 10.0 cu ft versus the COSMO's 5.0 cu ft. That is double the capacity, which matters if you frequently cook large roasts, multiple sheet pans, or run both cavities simultaneously. For everyday two- to four-person households, the COSMO's 5.0 cu ft is generally sufficient.
The KoolMore draws 8,500 watts versus the COSMO's 4,800 watts, both at 240 volts. Higher wattage means the KoolMore can preheat faster and recover temperature more quickly when you open the door mid-cook. Both require a dedicated 240-volt circuit, but verify your home's breaker capacity before installing the KoolMore given its substantially higher draw.
The COSMO lists at $1,889.99 and the KoolMore at $2,203.90, a gap of roughly $314. For that extra spend you get double the oven capacity and nearly double the wattage, which is solid value if you regularly push a double wall oven hard. If you mostly use one cavity at a time and bake at modest volume, the COSMO's lower price is hard to argue with.