Jen-Ken AF JK² 29" Ceramic Kiln

The Jen-Ken AF JK² 29" is built for ceramic artists who need serious firing capacity for oversized pieces, slip-cast molds, yard art, holiday trees, platters, and tall forms. Its generous square interior provides exceptional usable shelf space and easy loading, making it ideal for high-volume studios and community ceramic programs producing large work.

Engineered with heavy 2300°F brick construction and powerful side-firing elements, this kiln excels at frequent low-fire ceramic production (Cone 04–06) with the ability to fire occasional mid-range loads up to Cone 8 when programmed slowly. Standard lid lifters make loading effortless, even with frequent use, and the wide chamber lets you fire large pieces that would never fit in round kilns.

The JK² 29" comes standard as a 45-amp plug-in kiln (NEMA 6-50) with an optional 55-amp direct-wire configuration available for users who want improved power delivery for more demanding cycles or higher-temperature work.

Smart Digital Controller Options

Standard: Orton AutoFire 12-Key Controller
Cone-fire programs, custom schedules, mid-firing edits, holds, skips, and reliable precision for studio workloads.

Upgrade Options:
Orton AutoFire Slide Touchscreen — Intuitive touchscreen firing control
TAP Smart Touchscreen Controller — Wi-Fi, unlimited programs, cloud backup, firing logs, and remote monitoring

Optional Enhancements

Furniture Kit
Add shelves, posts, and kiln wash to maximize space and load flexibility — essential for multi-level bisque and glaze firing.

Solid-State Relay (SSR) Upgrade
Upgrade to silent, precise power control for smoother heating curves and extended relay life — ideal for frequent firing environments.

Included With This Kiln

Orton AutoFire 12-Key Controller
Lid lifters
Kiln stand
Instruction manual
2-year manufacturer warranty

Best For

Studios firing large works, slip-casters, ceramic sculptors, and production potters who need maximum loading space and dependable low-fire output with occasional mid-range capability.

• Model: AF JK² 29"
  
• Inside Chamber Dimensions: 27" W x 27" D x 29" H
• Cubic Feet: 11.4
• Overall Dimensions (Footprint and Height): 36" W x 46" D x 39" H
• Maximum Temperature: 2250°F/1232°C
• Elements: side firing
• Kiln weight: 250 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 45A config, 70A for 55A config
• Circuit wire gauge: 6 with 45A config, 4 with 55A config

The furniture kit option includes:

• 4 layers of shelves: 8 half
• 6 each: 1, 2, 4, and 6 inch posts
• 1 pound of shelf primer

Until further notice, Jen-Ken Kilns order-to-ship lead time is approximately 13-17 weeks.

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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.

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.

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.)