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Evenheat Knife Oven - KO 22.5

SKU EH-KO-225
Save $665.01
Original Price $3,325.00
Current Price $2,659.99
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Not sure this is the right fit? Power, size, firing needs: talk it through with a real person before you order. Call or text (470) 264-3563

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Flat-Rate Freight Delivery
✓ No sales tax outside GA ✓ Quoted at checkout ✓ Authorized dealer
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Made to Order: EvenHeat kilns are built after ordering. Current estimate is 4–6 weeks. We confirm all details after your order is placed.
  1. 1 We submit your kiln order for production with the manufacturer.
  2. 2 We confirm the current estimated lead time and keep you updated.
  3. 3 Your kiln is built to your specifications and prepared for freight shipment.
  4. 4 We send tracking and delivery instructions once your kiln ships.
Evenheat  ·  Heat Treating Oven  ·  KO Series Evenheat Knife Oven - KO 22.5 Model EH-KO-225 · 240V · 22.5" Deep Chamber · 2350°F Max The KO 22.5 is Evenheat's second deepest knife oven, purpose-built for heat treating long, heavy blades and high-mass steel loads. Engineered with 3" firebrick insulation and special high-temperature alloy elements, this side-opening oven delivers faster heat-up times and precise temperature control up to 2350°F. The 180° swing-out door design keeps the super-heated door safely away from you during critical quenching operations.
Max Temp2350°F
Chamber22.5" Deep
Voltage240V
Insulation3" Firebrick
Optional accessories
Power Interrupt SwitchOptional switch that cuts power to the heating elements whenever the door is opened.
Additional Shelves or RacksCustom shelving solutions for organizing multiple blades or parts within the chamber. Contact us for configurations that fit your workflow.
Thermocouple UpgradesPremium thermocouple options for enhanced temperature accuracy and longer service life in demanding heat treating applications.
Replacement Door GasketKeep a spare high-temperature door gasket on hand to maintain chamber seal integrity and energy efficiency over time.
Heat Treating Tool KitSpecialized tongs, gloves, and handling tools designed for safely loading and unloading steel from high-temperature ovens.
Loud AlarmOptional loud alarm so you can hear the oven's signal from across the shop.
Controller upgrades
TAP Touchscreen — SDS IndustriesTop Tier
For knife makers running complex heat treating cycles, the TAP touchscreen delivers unlimited programming flexibility and complete remote monitoring via smartphone. The TAP mobile app lets you track critical temperature ramps from anywhere in the shop and sends push notifications when your quench window arrives.
  • Unlimited programs and firing steps
  • TAP mobile app — monitor from your phone
  • Push notifications when firing completes
  • Adjust temp or add time mid-firing
  • Auto-updates over Wi-Fi
  • Firing logs and maintenance schedules
Genesis Spark — Bartlett InstrumentsGreat Value
The Genesis Spark offers serious heat treating capability at a mid-range price point, with 30 programmable heat treat cycles and real-time firing adjustments. The color touchscreen interface makes programming austenitizing and tempering cycles straightforward, with Wi-Fi connectivity for firmware updates.
  • 30 programs × 32 segments each
  • 3.2″ color touchscreen display
  • Wi-Fi for remote updates and diagnostics
  • Cone fire and ramp/hold modes
  • Preheat capability built in
  • Adjust firing in real time
Common questions
What's the advantage of the 3-inch firebrick over standard insulation?The 3" Thermal Ceramics firebrick in the KO Series provides a half-inch more insulation than standard 2.5" brick, resulting in faster heat-up times, better heat retention, and lower energy costs. This extra insulation is especially important when heat treating high-mass loads or running back-to-back cycles. The thicker brick also enables the oven to reach and maintain the full 2350°F maximum temperature more efficiently.
Why is the side-opening door design better for heat treating?When you open a drop-down door on a front-loading oven, the super-heated door is directly in your path as you try to remove hot steel for quenching. The KO's side-swing design opens a full 180° to move the door completely out of your way, giving you a clear, safe path to quickly extract your work. This matters most during time-critical quenching operations where seconds count and you need both hands free to handle tongs safely.
Can this oven handle the heat treating requirements for high-alloy tool steels?Yes. The 2350°F maximum temperature covers the austenitizing range for virtually every knife steel you'll encounter, including high-alloy tool steels like CPM-154, S30V, S35VN, and even air-hardening steels like A2 and D2. The special high-temperature element alloy borrowed from ceramic kiln design ensures reliable performance at these extreme temperatures. Most carbon and stainless blade steels require significantly less than 2350°F, so you'll have plenty of headroom.
What does "second deepest" mean and what length blades will fit?The KO 22.5 has a 22.5-inch deep chamber, making it Evenheat's second deepest model in the KO line (only the largest model is deeper). This depth accommodates long blades, swords, and multiple smaller knives arranged front-to-back. Inside, the chamber is 22.5" deep, 9" wide and 5.5" high. For capacity planning for your work, contact us with your typical blade lengths and we'll confirm fitment and suggest the optimal rack configuration.
Does buying from Peach State Pottery affect my warranty?No. We are an authorized Evenheat dealer. Your two-year warranty is fully valid and you have direct access to Evenheat’s support team. Buying from an unauthorized seller can void your warranty entirely.
Not sure if the EH-KO-225 is right for you? We’re authorized Evenheat dealers based in Atlanta. Call, email, or chat — we’ll give you a straight answer about specs, sizing, and accessories before you spend a dollar.
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Common questions about this kiln

Still stuck? Call or text (470) 264-3563 and talk it through with a real person.

Is freight delivery included in the price?

No. Kiln prices do not include freight, and we do not quietly build it into the product price. Freight is charged at a flat rate based on your delivery address and is shown at checkout. Liftgate service is included when it is needed, and standard delivery is curbside. You can estimate your delivered cost with the ZIP code tool above the Add to Cart button.

Can I return this kiln if it is not right?

Return requests can be submitted within 30 days of delivery. The kiln needs to be in its original packaging, in new and resellable condition, and approved before it is sent back. A restocking fee may apply. Completing the manufacturer's recommended first test firing does not by itself make a kiln non-returnable, so you can confirm it works before you commit. Full terms are on our Returns page.

What electrical supply do I need for this kiln?

The Specifications tab on this page lists this model's voltage, amperage, required breaker size and NEMA plug configuration. Most 240V kilns need their own dedicated circuit fitted by a licensed electrician, while many 120V models run from a standard household outlet. If you are unsure what your space can support, call or text (470) 264-3563 before ordering.

Does this kiln come with a warranty?

Yes. This kiln carries the Evenheat manufacturer warranty. Coverage length, what is included and any registration deadline are listed in the Specifications tab on this page. We are an authorized Evenheat dealer, which is a condition of warranty coverage on most kiln brands.

What comes with the kiln, and what do I need to buy separately?

The What's Included tab on this page lists exactly what ships with this kiln. Most kilns need shelves, posts and kiln wash before your first firing, and these are not always included. A vent is recommended for indoor installations. Any add-ons available for this model are shown above the Add to Cart button.

About this kiln
Best for: Glass artists, ceramic hobbyists, knife makers, and specialty craftspeople who need a precision American-made kiln with accurate temperature control and a compact, studio-friendly footprint.
🔨 Lead time
4–6 weeks
Made to order — built to your specifications. We confirm the current estimate after your order is placed.
✓ Warranty
Manufacturer warranty
Full coverage included. We are here if anything goes wrong after your order.
Why buy from Peach State Pottery?
★ Authorized EvenHeat Dealer
★ No sales tax outside Georgia
★ Flat-rate freight delivery
★ Real support before & after order
★ Military discount for veterans
★ We are here if anything goes wrong
Call or text us:✆ (470) 264-3563
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EvenHeat production slots fill fast
Placing your order now locks in your position in the build queue and secures today’s pricing. Lead times can shift during high-demand periods.