Jen-Ken JK² Ceram-a-Glass Kiln

This kiln brings serious versatility to artists who want one machine for both glass and ceramics. With a unique octagonal “square-with-corners-cut” chamber and a roomy 27" × 27" × 22" interior, it fits large platters, slump molds, casting projects, sculpture work, tiles, and multi-layer loads with ease—perfect for studios exploring multiple firing disciplines.

A dedicated glass/ceramic switch toggles between lid-dominant heat for glass and side-element firing for clay, glazes, and casting materials. Fire glass up to 1700°F for fusing, slumping, and annealing, or ceramics up to 2150°F for bisque, low-fire, mid-range holds, and specialty glass casting techniques. Lid lifters come standard for easy, ergonomic lifting and safe use.

The kiln includes the Orton AutoFire 4000 12-button controller for reliable, programmable firing control, with options to upgrade to touchscreen interfaces for advanced profiles and modern workflow features.

Controller Options

• Orton AutoFire 4000 12-Key Controller (standard)
• Orton AutoFire Slide Touchscreen Controller (upgrade)
• TAP II Touchscreen Smart Controller (upgrade; Wi-Fi capable)

Optional Enhancements

• Solid State Relays (SSRs) – Silent, precise power control and longer relay life; ideal for glass and long holds
• Furniture Kit – Shelves, posts, and wash for efficient multi-level loading and heat flow

Key Features

• Dual-media kiln for glass & ceramics
• Fires to 1700°F (glass), 2150°F (ceramics)
• Spacious 27" × 27" × 22" interior
• Unique octagonal footprint for efficient loading
• Glass/ceramic heating mode switch
• Lid lifters standard
• Optional SSRs & furniture kit
• Includes stand, kiln wash, and manual
• 2-year limited warranty

Designed for artists who need a single kiln that can fuse, slump, cast glass and also bisque and glaze fire clay, the JK² combines capacity, flexibility, and control for ambitious studio practices.

• Model: JK² Ceram-A-Glass
  
• Inside Chamber Dimensions: 27" W x 27" D x 22" H
• Cubic Feet: 9.11
• Overall Dimensions (Footprint/Height of Kiln Body): 36” x 40” x 27”
• Maximum Temperature: 1700° (Glass), 2150° (Ceramic)
• Elements: Side or Top/Side
• Kiln weight: 375 pounds
  
• Amperage/volts: 45 at 240 volts
  
• Watts: 10,800
  
• Breaker: 60 amps required
• Plug configuration: NEMA 6-50
  

The furniture kit option includes:

• 3 layers of shelves: 6 half
• 6 each: 1, 2, 4 and 6 inch posts
• 1 pound of shelf primer

Jen-Ken's current production timeline is about 6 to 8 weeks.

We get it. You've got a lot of choices when it comes to online retailers. Here's why we think you should shop with us at Pottery Pulse.

• Best Price Guarantee. Better price elsewhere? We'll beat it.
• Risk-Free Shopping. 30-day returns. No restocking fees. No return shipping fees. No transaction fees.
• Hassle-Free Cancellations. That's good for your heart. Cancel any time before shipping with no penalties or hidden fees!
• 5-Star Support. Read our verified reviews. Our customers know we put everything into their shopping experience.

If this specific product has already been reviewed, you will find it below all the product information tabs, and above the "You may also like..." section.

If it has not, you can still find all reviews left from Pottery Pulse customers at this Reviews page on our site. Please click that link and read what other customers are saying as you consider whether or not to provide your business to Pottery Pulse.

We are confident we sell outstanding products from outstanding manufacturers, and that we'll top the best customer experience you can find anywhere. We are devoted to our customers because we simply are out of business without them.

Simply put, you could say that makes you the center of our universe.

Choose the voltage that matches the electrical service where the kiln will be installed. Some kilns are available in only one voltage, while others can be ordered in multiple voltages. If both 120V and 240V are available, 240V is generally the preferred choice because it places less demand on your electrical system, while 120V offers the convenience of operating on a dedicated standard household circuit. If both 208V and 240V are available, select the voltage that matches your building's electrical service—240V is most common in homes, while 208V is common in many commercial, educational, and institutional buildings. If you're unsure which voltage you have, confirm it with your electrician before ordering.

Your kiln must be built to match the electrical service where it will be installed. Choose single-phase if that's what your building has (almost all homes do). Choose three-phase only if your building has three-phase power available. If both are available, three-phase is generally the preferred option. If you're unsure, verify the available electrical service with your electrician before placing your order.

Mechanical relays are standard and reliable. Solid-state relays (SSR) offer silent operation, faster cycling, greater precision, and longer lifespan—ideal for frequent or high-accuracy firings.

The following controllers are used across kilns sold by Pottery Pulse. Not all models offer every option—available controllers are listed on each product page. Some kilns include only the standard controller, while most allow upgrades for added precision and convenience.

Olympic Kilns

• Infinite Switch – Manual dial control for simple heat adjustments.
• KilnStar – Digital controller with preset and user-defined programs.
• Genesis – Advanced touchscreen interface with Wi-Fi and data logging.

Evenheat Kilns

• Icon – Digital 3-button controller for straightforward firing.
• RampMaster II – Manual digital controller for ceramic kilns; flexible ramp/hold programming.
• RampMaster 3 – Updated version for glass kilns with refined interface.
• Icon+ – Enhanced digital control with expanded profiles and precision.
• TAP II – Smart touchscreen controller with Wi-Fi, data tracking, and remote access.

Hot Shot Kilns

• Novus – “Set & Go” controller: set a target temperature and it does the rest (no segments).
• Spark – Entry-level touchscreen controller with intuitive operation and limited program control.
• TAP II – Smart touchscreen controller with Wi-Fi and real-time monitoring.

Jen-Ken Kilns

• Orton AF3P 3-Button – Reliable and straightforward for basic firing.
• Orton AutoFire 4000 12-Key – Expanded program capacity and fine control.
• Orton AutoFire Slide Touchscreen – Modern, responsive touchscreen interface.
• TAP II Touchscreen Smart Controller – Wi-Fi connectivity and real-time data tracking.

Not all kilns can use a collar, but Olympic’s Hot Box kilns can be ordered with a collar to expand versatility. A blank collar simply adds height to the firing chamber, while a bead collar adds the same height and includes a built-in bead or annealing door for quick-access lampwork projects.

This safety feature automatically cuts power to the heating elements whenever the kiln lid or door is opened. It prevents accidental burns, protects elements, and resumes power only when safely closed. (Also called an automatic lid shutoff on Olympic kilns.)