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Straight-on view of opened, oval-shaped AF Ceram-A-Glass kiln from Jen-Ken ideal for ceramics, glaze firings, and glass fusing, slumping, and annealing. It's on a short metal stand and showing the electrical box with an Orton AutoFire 4000 12-button controller.

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

Save $1,415.00
$7,076.00
$5,661.00
Financing Information i

Financing through Approve is exclusively for business equipment loans and is available to all types of organizations, excluding personal loans. Minimum purchase price of $1,500.

A huge dual-media kiln for studios needing high-volume glass and ceramic firing in one machine. Ideal for large slumps, big platters, production bisque loads, and serious makers.

Important Details:

  • Chamber size: 39" W x 24" D x 18" H
  • Volume: 9.33 cubic feet
  • Max temp: 1700° (Glass), 2150° (Ceramic)
  • Electrical: 45A and 55A configs available
  • See specifications tab for details

iNot sure what product options to choose? Check out our Kiln FAQs below!

Controller selection
Relay selection
Furniture selection

Need a formal quote or to request a W9? Let us know!

Interested in all Reviews ever provided to Pottery Pulse, regardless of product? Click here.

Jen-Ken AF Ceram-a-Glass Oval 3" Kiln – Maximum Capacity Dual-Media Firing Power

The Jen-Ken AF Ceram-a-Glass Oval 3" 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: AF 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

Estimated order-to-ship lead time is approximately 6 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.

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.

FAQs - Configuring Your Kiln

There are certain selections you must choose. And then there are options you can click on or ignore. The answers below should help you make the best choices for you.

 Which Kiln Voltage Should I Select?

Higher voltage means lower amperage draw and greater efficiency, which can save money long term. 240V and 208V cost the same—most home studios use 240V, while 208V is common in schools or large facilities. Amperage refers to the amount of electrical current a kiln draws—higher amps require heavier wiring and breakers.

What's The Difference Between Single-Phase and Three-Phase?

Single-phase is what almost all homes have. If your facility has three-phase, you can choose either—but three-phase is typically the better long-term option due to smoother power and improved efficiency.

Which Relay Option Do I Need?

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.

What Are The Differences Between Kiln Controllers?

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.

What Are Collars For?

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.

What Does The Power Interrupt Switch Do?

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.)
Description

Jen-Ken AF Ceram-a-Glass Oval 3" Kiln – Maximum Capacity Dual-Media Firing Power

The Jen-Ken AF Ceram-a-Glass Oval 3" 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.

Specifications
  • Model: AF 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
Current lead times

Estimated order-to-ship lead time is approximately 6 weeks.

Why Buy From Us

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.

Customer Reviews

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.