Jen-Ken 28-E 15" 3" Glass Kiln

The 28-E 15″ 3″ is a powerhouse glass kiln built for artists tackling large, complex projects. With its 26″ solid round shelf and 15″ depth, it easily accommodates oversized sinks, bowls, and fused panels up to 18″ × 18″ square. Its round shape eliminates cold corners for uniform heating, while 3″ firebrick walls and lid enhance insulation, efficiency, and durability. Two lid coils and four side coils deliver balanced top-and-side firing, giving you consistent results across every piece. Lid lifters are included for effortless handling during long sessions.

Controller Options

This kiln comes standard with the Orton AutoFire 4000 12-Key Controller, offering reliable, precise digital control. Two upgraded touchscreen options are also available:

• Orton AutoFire Slide Touchscreen – simple and intuitive operation for streamlined programming.

• TAP II Touchscreen Smart Controller – advanced connectivity, Wi-Fi access, and data logging for total firing insight.

Optional Add-Ons

Enhance your setup with an SSR (Solid State Relay) for quieter, smoother temperature control, or add the Small Furniture Kit (26″ shelf with four ½″ posts) for multi-level firing flexibility.

What’s Included

• Orton AutoFire 4000 12-Key Controller (standard)

• Kiln Stand

• Kiln Wash

• Instruction Manual

• 2-Year Limited Warranty (on kiln and controller)

Engineered for reliability and performance, this kiln’s 3″ insulation, balanced heating, and generous interior make it a favorite among serious glass artists and studios.

• Model: 28-E 15" - 3" Glass
  
• Inside Chamber Dimensions: 28” W x 15” H
• Cubic Feet: 5.33
• Maximum Temperature: 1700°F
• Elements: Top, Side firing
• Kiln weight: 275 pounds
  
• Volts: 240
• Amperage: 45A
  
• Watts: 10,800
  
• Plug configuration: NEMA 6-50
• Breaker: 50A
• Circuit wire gauge: 6

The furniture kit includes:

• (1) 26" shelf
• (4) 1/2" posts

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

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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.)