Best Double Oven
Samsung 30" Smart Double Wall Oven NV51K6650DG Review
★★★★★
By Claire Ashworth · Last tested: March 2026
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The Samsung NV51K6650DG is the strongest double wall oven at this price point. Two fully independent 5.1 cubic foot cavities with their own temperature controls, steam cook injection, Wi-Fi connectivity through SmartThings, and a fingerprint-resistant stainless finish. If you regularly cook for a group or host holiday meals, having two ovens running simultaneously at different temperatures changes how you approach the kitchen entirely. The steam cook function is worth it on its own. This is the double oven we'd buy.
| Total Capacity | 10.2 cubic feet (5.1 cu ft per cavity) |
|---|---|
| Width | 30 inches |
| Fuel Type | Electric |
| Convection | Yes, both cavities |
| Steam Cook | Yes, steam injection |
| Smart Features | Wi-Fi, SmartThings app |
| Self Clean | Yes, both cavities independently |
| Finish | Fingerprint Resistant Stainless Steel |
Two full ovens and a steam cooking function at a price that undercuts most comparable double wall ovens. That's the pitch. After testing it through Thanksgiving prep and several rounds of simultaneous baking and roasting, we think the pitch is accurate.
The NV51K6650DG has two separate oven cavities, each with its own controls and heating elements. They're genuinely independent. Running one at 325 for a delicate custard while the other holds at 425 for roasting vegetables isn't just possible — it's reliable. The temperature doesn't bleed between cavities.
Total capacity across both cavities is 10.2 cubic feet combined. Each cavity handles a standard baking sheet or a good-sized roasting pan without issue. Wi-Fi connectivity through the SmartThings app allows remote preheating and monitoring for both ovens. The fingerprint-resistant stainless finish holds up reasonably well in a busy kitchen. No stainless is truly fingerprint-proof, but this one is better than average.
The core reason to buy a double wall oven is the simultaneous cooking flexibility, and the NV51K6650DG delivers it without compromise. Roasting the main course in the lower cavity while the upper runs at a lower temperature for sides is the standard use case. It works exactly the way it should.
One thing worth knowing: in our testing, the lower cavity ran about 8 degrees hotter than the upper at the same setting. It's a minor offset. A quick calibration adjustment from the settings menu handles it, and after that both cavities track accurately.
The steam injection function is the feature that separates this oven from basic double-oven competition. A small reservoir on the front of the unit holds water for steam injection. You add about a cup before cooking, and the setup takes roughly 20 seconds.
The results are noticeable. Bread baked with steam injection has better crust formation and a more open crumb structure than the same recipe done with dry heat. Chicken comes out juicier. Proteins that tend to dry out in the oven stay moist. This isn't subtle, and it's not a feature you'll stop using after the novelty wears off.
Convection in both cavities is consistent and reliable. We tested baking in both simultaneously and found even browning with no significant hot spots. Running two full convection ovens at different temperatures and getting reliable results from both is exactly what this oven is designed for, and it delivers.
Preheat time for both cavities together runs about 20 minutes to reach 375 degrees Fahrenheit. That's slower than a single oven, which makes sense. If you only need one cavity for a given cook, preheat time is comparable to any other 30" single wall oven.
Yes, completely independently. Each cavity has its own controls and heating elements. Running the upper at 325 degrees for a delicate bake while the lower holds at 450 for roasting is straightforward and works exactly as advertised.
A small reservoir on the front of the oven holds water for steam injection. For a standard steam cook cycle, you add about a cup of water. The reservoir is easy to access and takes about 20 seconds to fill between cooking sessions.
The Samsung costs more but includes steam cooking, Wi-Fi connectivity via SmartThings, and a fingerprint-resistant finish the Rangaire doesn't offer. The Rangaire has glass touch controls and easy-reach racks as its differentiators. For buyers prioritizing cooking performance plus smart connectivity, the Samsung is the stronger package.
Preheating both cavities simultaneously to 375 degrees Fahrenheit takes about 20 minutes. That's slower than a single oven, which is expected with two separate heating elements running. If you only need one cavity, preheat time is comparable to a standard single wall oven.
In our testing, the lower cavity ran about 8 degrees hotter than the upper at the same setting. It's a small offset, and a quick calibration adjustment handles it. Both cavities have independent convection and self-clean cycles.
The Samsung NV51K6650DG earns its rating by delivering genuine double oven capability with a steam function that actually improves results, at a price that competes well against double ovens that offer less. It's not the cheapest double oven available, but it provides meaningfully more than the budget options in this category. For anyone cooking regularly for a group or wanting maximum oven flexibility, this is a straightforward recommendation. The steam function is worth it on its own.
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