Ninja Foodi Double Oven with Foodi Smart Thermometer DCT451 review

The Ninja Foodi Double Oven DCT451 is an earlier two-zone model that combines a six-slice upper toaster, lower Air Fry and Dehydrate programs, and an included wired Foodi Smart Thermometer. Its menu is distinct from the later Double Oven Pro models: DCT801BK has two zones but no listed probe or Dehydrate mode, while DCT871 adds a Pro Cook probe but omits Dehydrate.

Two chambers, each with a defined job

The DCT451's top chamber is the quick toaster-oven side: Broil, Toast, Bagel, Bake, Reheat and Keep Warm. The bottom chamber handles Air Fry, Convection Bake, Pizza, Air Roast, Whole Roast and Dehydrate. Those are 12 modes across the appliance, not 12 settings per chamber. The guide specifies one rack position above and two below, with accessories and rack levels assigned by function. That makes the split easy to understand, but it does not turn the unit into two full-size wall ovens or prove that every favorite pan will fit.

The independent settings can avoid back-to-back use of one cavity when breakfast and a side need separate timing. Smart Finish can sync two routines, with the shorter program waiting while the longer one runs. If you mainly bake one casserole at a time, the 31.3-pound two-zone body may be more than you need. Check the listed 18.6-inch length, 16.39-inch width and 13.26-inch height; allow the manual's inch of airflow above and on every side, plus room for doors, hot pans and the plug.

What the included probe can—and cannot—do

The useful distinction from an ordinary two-zone oven is the Foodi Smart Thermometer in the DCT451's listed box. The DCT450-series guide shows a preset and manual doneness workflow, with target and current temperature information, and describes use in supported protein routines. That can help when a household repeatedly roasts thicker cuts and wants the control panel to follow the probe rather than relying only on a timer. The guide also gives careful insertion advice: place the tip in the thickest part, away from bone and fat; for a whole chicken, use the breast and avoid the bone and cavity.

This is not an all-mode probe. The guide rules it out for Top Toast, Bagel, Reheat and Keep Warm, and Bottom Dehydrate. It also says not to probe frozen protein or cuts one inch thick or thinner, warns that the probe is hot, and directs users to verify safe food temperatures with an external food thermometer. In practice, DCT451 offers both a probe-guided roast routine and a separate Dehydrate routine—not probe monitoring while drying food. The probe is a real included feature, not a food-safety guarantee.

Dehydrate and Air Fry are different jobs

Air Fry circulates hotter air for foods such as wings or fries; the manual places the basket in the lower chamber and allows an under-pan for drips. Dehydrate is a separate low-temperature cycle, up to 24 hours, without preheating. The basket is one drying level; the guide says a separate accessory is needed for two. The product page's six-pound wings example and the manual's 4.5-pound Whole Roast chicken example describe different jobs, not a shared or simultaneous load guarantee.

Placement, setup and cleanup

Before a first cook, remove packing material, wash and dry the listed accessories, and use the manual's suggested empty run: Bake at 450°F in the top oven while Air Fry runs at 450°F in the bottom for 25 minutes, with good ventilation. Keep the unit on a level, stable countertop, leave the specified airflow gaps and do not use an extension cord. The published 1,800-watt, 120-volt rating is worth checking against the outlet you plan to use.

After use, unplug and wait for the oven to cool before cleaning. The manual calls for frequent crumb-tray emptying and hand washing the sheet pan and crumb tray; those pieces should not go in the dishwasher. The wire racks and air-fry basket are dishwasher-capable, though the guide says they may wear faster. Keep the crumb tray below the heating elements, not as an extra shelf. The manual’s parts diagram shows a magnetic holder for the probe, but SharkNinja’s exact box list does not include it; check the specific package if storage matters. For missing parts, verify DCT451 compatibility rather than assuming a similar Ninja pan or probe will fit.

Who should still consider it?

Choose the earlier DCT451 as a reference point if you need all three: two separately scheduled chambers, a dedicated Dehydrate program and an included wired probe for compatible foods. If you only want the two-zone cooking and do not need the probe, compare the smaller, lighter DCT801BK listing; its exact menu differs and it does not include the probe. If probe-guided cooking matters but Dehydrate does not, compare the DCT871, whose published body is wider, deeper and taller than the DCT451. The Double Stack DCT651 is another two-zone model with an included probe and Dehydrate, but its physical layout and exact measurements are different again. Don't treat compatible parts or similar product names as interchangeable model evidence.

In the finder, DCT451 is hidden unless you choose to include earlier models. A probe requirement can include it, as can two independent zones or a Dehydrate requirement; a strict 16-inch body-width limit rejects it because the listed width is 16.39 inches. Requiring a probe to operate during Dehydrate also rejects it, because the manual says those modes do not work together. If you need a current model only, leave the earlier-model option off. If you are evaluating a used or remaining offer, inspect the exact model label, probe, racks, pans, tray, seller terms and condition.

This is a source-based model assessment, not a cooking trial. No toast-evenness, temperature-accuracy, cooking-time, energy or durability test is claimed. See the Ninja Double Oven generations comparison, the DCT801BK and DCT871 comparison and the Double Stack DCT601/DCT651 guide before deciding whether you need a probe, a dedicated drying mode or a different footprint.