Jen-Ken Ceram-a-Glass Oval 3" Kiln

This is a large-format dual-media kiln built for studios that need serious capacity and the flexibility to fire both glass and ceramics. With a massive 39" × 24" × 18" chamber and 3" brick insulation for superior efficiency and heat retention, it’s ideal for production-scale glass artists, ceramicists, and mixed-media makers. Its oval interior fits two 21" × 18" D-shelves, forming a generous 21" × 36" firing surface—perfect for large slumps, wide platters, fused panels, and bigger bisque or glaze loads.

A dedicated glass/ceramic switch tailors heating mode to your project: top-focused heat for smooth, even glass results, and controlled side-element firing for clay up to ~Cone 6 (≈2150°F). Lid lifters make opening and closing effortless despite its generous size.

This kiln includes a standard 45-amp plug-in configuration for low-fire and mid-range use, with an optional 55-amp direct-wire upgrade for enhanced power delivery and extended element life during frequent firing cycles.

Standard with the Orton AutoFire 4000 12-key controller, this kiln delivers consistent firing profiles with room to grow. For advanced workflows, upgrade to a touchscreen controller for even more precision and convenience.

Controller Options

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

Optional Enhancements

• Solid State Relays (SSRs) – Silent, precise power cycles & longer relay life
• Furniture Kit – D-shelves, posts & kiln wash for efficient multi-layer firing

Key Features

• Dual-media: glass & ceramics
• Huge 39" × 24" × 18" chamber
• Fits dual 21" × 18" D-shelves (21" × 36" firing surface)
• Side-firing ceramics to ~Cone 6 (~2150°F)
• Glass firing to ~1700°F
• Standard 45A plug or optional 55A direct-wire power configuration
• 3" brick insulation for energy savings & stability
• Lid lifters included
• SSR & furniture kit options
• Stand, kiln wash & manual included
• 2-year limited warranty

For studios needing oversized fused work, large slump forms, or high-volume ceramic loads, the Ceram-a-Glass Oval 3" provides unmatched space, flexibility, and efficiency in one powerhouse kiln.

• Model: Ceram-A-Glass Oval 3"
  
• Inside Chamber Dimensions: 39" W x 24" D x 18" H
• Cubic Feet: 9.33
• Maximum Temperature: 1700°F (Glass), 2150°F (Ceramic)
• Elements: Side, Top/Side
• Kiln weight: 375 pounds
  
• Volts: 240
• Amperage: 45A with NEMA 6-50 Plug, 55A direct wired
  
• Watts: 10,800 with 45A config, 13,200 with 55A config
  
• Breaker: 60 amp for both configurations
• Circuit wire gauge: 8 with 55A config

The furniture kit option includes:

• 3 layers of shelves: 6 ″D″-Shaped Half Shelves
• 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.

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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.)