Feature
Three temperature sensors.
Benefit
Heat is monitored and adjusted throughout the cook.
Outcome
The recipe that worked last Sunday works this Sunday.
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Flagship · Steam-Assisted Convection
The Certainty Oven 33.8 QT
Steam-assisted convection for the cook who plans the bake. Bake flat foods on up to four racks at once, with room for airflow. Add steam during Bake mode when the recipe calls for it.
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1-year warranty
01 / The Certainty Oven
For the cook who plans the bake — not the one hoping it works out.
You already know the feeling: two trays in, one pale, one burnt. The Certainty Oven brings a high-flow fan and three temperature sensors to the task. One sensor monitors the cavity; two monitor the steam system. Every batch counts.
Multi-Rack Baking
4 Racks for flat bakes.
Bake cookies or other low-profile foods on up to four racks at once. Leave room above each tray for air to circulate.
Steam or Roast, No Gamble
3 Three steam levels. On cue.
Pure steam and three adjustable steam levels for Steam, Roast and Reheat. In Bake mode, activate a five-second burst of steam when bread or pastries need moisture.
Set the Temp, It’s the Temp
3 Sensors, working together.
Three temperature sensors monitor the cavity and steam system as the oven cooks.
01 / Racks
Four racks for cookie-batch day.
Use up to four racks at once for cookies and other low-profile bakes. Leave enough space above the food for air to circulate.
02 / Steam
A measured pulse, not a fog.
Pure steam mode for fish and vegetables. Three adjustable steam levels are available in Steam, Roast and Reheat. In Bake mode, activate a five-second burst of steam for bread, rolls or pastries.
03 / Control
The setting and the cavity stay in conversation.
Three temperature sensors monitor the oven cavity, evaporator and steam tray during cooking.
04 / Probe
The probe calls it done.
The included food probe reads the roast from the inside. Set the target, close the door, and the oven holds its side of the deal — no opening the door to poke, no guessing at carryover. Done means done.
05 / Daily
Counter-resident, not retreat-to-the-pantry.
Self-clean cycle and hidden heating elements make cleanup easier. The steam tray, baking tray, and wire rack are dishwasher-safe; wash the water tank by hand.
06 / In the box
Everything you need to start cooking.
Oven body, 304 stainless steam tray, 304 stainless baking tray, 304 stainless wire rack, food probe, silicone gloves, and instruction manual — all included.
Engineering
From spec sheet to dinner table.
Feature
High-flow fan + circulating duct geometry.
Benefit
Room to bake low-profile foods on up to four racks at once.
Outcome
More cookies in one batch.
Feature
Steam · 3 levels · five-second steam burst in Bake mode.
Benefit
Moisture lands exactly when the bake needs it.
Outcome
Bread with an ear. A roast with crackle.
Outcomes
What it bakes.
01 / Bread
Open-crumb sourdough.
02 / Roast
Sunday chicken with crackle.
03 / Bake
Up to four racks of cookies in one batch.
04 / Steam
Salmon that stays moist.
Specs
The numbers.
MODEL
ZKW320-220B1
DIMENSIONS
20.4 × 21.1 × 15.9 in (517 × 536 × 404 mm)
NET WEIGHT
37.3 lb (16.9 kg)
CAPACITY
33.8 QT
MODES
Steam · Bake · Roast · Air Fry · Reheat · Proof · Dehydrate · Self-Clean
CONTROL
3 temperature sensors · 1 food probe
STEAM
Steam · 3 levels for Steam, Roast and Reheat · five-second burst in Bake mode
CERTIFICATION
FCC
POWER
1800 W · 120 V
Reviews
What owners say.
Customer reviews coming soon.
In the box
- Oven body
- 304 stainless steam tray
- 304 stainless baking tray
- 304 stainless wire rack
- Food probe
- Silicone gloves
- Instruction manual
FAQ
Questions.
A steam-microwave heats water with microwaves; the Certainty Oven uses convection heat with measured, true steam at controlled levels. The difference shows up in crust formation, oven spring, and browning — which is to say, in everything that makes baking feel like baking.
Yes, for cookies and other low-profile foods. Leave enough room above each tray for air to circulate, and follow the recipe for rack placement and timing.
It reads the internal temperature of the food and ends the cook when the target is reached. The probe works with Steam, Bake, Roast and Air Fry. Set 165°F for chicken, close the door, and stop guessing at doneness. The probe ships in the box with the 33.8 QT Standard.
Outlet and circuit requirements for this 33.8 QT model are being verified. Contact support@ouninglobal.com for the manual that matches your unit’s model number before connecting it.
Both are in development. The 21.1 QT Mid targets 2–3 person households; the 14.8 QT Compact brings full steam to small kitchens. Join the Certainty Club below and we’ll tell you the moment either goes live.
Yes — you may request a return or exchange within 30 days from delivery of the final item in your order. Our team reviews each request before a return is sent. You pay return shipping for a change of mind or an unsuitable product; Ounin covers it for approved defective, damaged-on-arrival, or incorrectly supplied products. See our return policy for conditions and the effective date.