Feature
3 NTC sensors + SCR power control.
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
Steam-assisted convection for the cook who plans the bake. Four racks come out the same. Steam arrives exactly when it should. The temp is the temp you set.
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Free shipping
30-day trial
2-year warranty
120V · standard outlet
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, and an oven dial that treats 350°F as a suggestion. The Certainty Oven treats it as a contract. Three sensors hold the cavity to the number on the display. Steam isn’t mystery — it’s physics, delivered on cue. Every batch counts.
Multi-Rack, Same Result
4 Four racks. One outcome.
A high-flow fan and a circulating duct — air out around the edges, back through the center — keep every rack at the same temperature. Up to four racks, no rotating trays halfway.
Steam or Roast, No Gamble
3 Three steam levels. On cue.
Pure steam, three adjustable steam levels, and one-touch steam shots mid-bake. Steam Bake adds moisture automatically when the crumb needs it — not when the fog decides.
Set the Temp, It’s the Temp
3 Sensors, working together.
Three NTC sensors and SCR power control monitor the cavity and adjust the heating elements continuously, giving recipes a steadier, more dependable environment.
01 / Racks
Four racks at once. Four racks the same.
The fan and duct geometry were designed for stacking: air pushes out around all four edges and returns through the center, so the top rack bakes the same as the bottom. Cookie batch day stops being triage.
02 / Steam
A measured pulse, not a fog.
Pure steam mode for fish and vegetables. Three steam levels for bread and roasts. A one-touch steam shot when the crust is setting. Steam Bake watches the cavity and adds moisture automatically — enough for oven spring and gloss, never a sauna.
03 / Control
The setting and the cavity stay in conversation.
Three NTC sensors read the cavity; SCR power control adjusts the elements continuously instead of relying on broad on-off swings. That steadier heat makes repeat recipes easier to trust.
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, hidden heating elements, removable racks, and dishwasher-safe trays. The oven that earns Sunday keeps its place on Monday.
Engineering
From spec sheet to dinner table.
Feature
High-flow fan + circulating duct geometry.
Benefit
Even heat across up to four racks at once.
Outcome
48 identical cookies, not 36 + 12 burnt.
Feature
Pure steam · 3 levels · one-touch steam shot.
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
Four racks of cookies, all the same color.
04 / Steam
Salmon that stays moist.
Specs
The numbers.
MODEL
ZKW320-220B
DIMENSIONS
20.4 × 21.1 × 15.9 in (517 × 536 × 404 mm)
NET WEIGHT
33.5 lb (15.2 kg)
POWER
2200 W · 120 V
CAPACITY
33.8 QT (32 L)
MODES
Steam · Bake · Roast · Air Fry · Reheat · Proof · Dehydrate · Self-Clean
CONTROL
3 NTC sensors · SCR power control
STEAM
Pure steam · 3 levels · one-touch steam shot · Steam Bake auto-moisture
CERTIFICATION
To be confirmed
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. The fan and duct were designed for stacking — air pushes out around the edges of the cavity and returns through the center, so each rack sees the same moving air at the same temperature. No rotating trays halfway through.
It reads the internal temperature of the roast and ends the cook when the target is reached. Set 165°F for chicken, close the door, and stop guessing at doneness. The probe ships in the box with the 32L Standard.
No. It runs on a standard 120V US outlet. No hardwiring, no dedicated circuit.
Both are in development. The 20L Mid targets 2–3 person households; the 14L Compact brings full steam to small kitchens. Join the Certainty Club below and we’ll tell you the moment either goes live.
Yes — 30-day in-home trial. If it doesn’t earn its counter space, we’ll arrange pickup and refund you in full.