Skip to content

Evenheat GTS 23 Glass Kiln

Save $658.00
Original Price $3,290.00
Current Price $2,632.00

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.

Controller selection
Solid State Relay

Are you located in Hawaii, Alaska, Puerto Rico... or anywhere outside the contiguous United States?

You'll need to contact us directly so we can provide you a shipping quote and help you complete your purchase.

The Evenheat GTS 23 Glass Kiln: A Legacy in Glass Firing Excellence

Introducing the Evenheat GTS 23 Glass Kiln, a 23" legacy design that has been a staple in the glass firing world from its inception. Known for its generous size and robust power, the GTS 23 is a beloved choice in both personal and professional studios. This kiln is adept at handling small pieces in large quantities and is equally capable of producing sizable, intricate works of art.

State-of-the-Art Control for Precision and Flexibility

Equipped with your choice of Evenheat's cutting-edge Icon, RampMaster 3, Icon+, or TAP II control systems, the GTS 23 offers unparalleled precision and flexibility in firing. These high-end controls ensure that your glasswork is fired under the most optimal conditions, producing results that are consistently impressive.

Exclusive Swing View Adjustable Viewing: A Touch of Convenience

The GTS 23 comes standard with Evenheat's exclusive Swing View Adjustable Viewing feature, providing the utmost convenience in monitoring your projects. This innovative design allows for effortless adjustments to the viewing angle, ensuring a comfortable and efficient firing experience.

Enhanced Performance with Quiet Drive Solid State Relay

Upgrade your GTS 23 with the Quiet Drive Solid State Relay option for even tighter temperature control and extended element life. This feature not only enhances the quality and precision of your firings but also contributes to the longevity of your kiln, making it a wise investment for both hobbyists and professionals.

Seamless Dyna-Lift Design for Smooth Kiln Lid Operation

Engineered with precision, it greatly minimizes the effort needed to operate the kiln lid, transforming your kiln operation into a smooth, effortless, and enjoyable experience. The superior design of the Dyna-Lift, featuring no attachment to the kiln body and a single-point lifting mechanism, guarantees a smooth and natural movement of the kiln lid with each use. This is an optional feature on the GTS 23.

Your Ideal Studio Companion

Whether you're crafting small, detailed pieces or exploring larger glass projects, the Evenheat GTS 23 Glass Kiln is your ideal studio companion. Its blend of size, power, and advanced features makes it a top choice for artists who demand the best in quality and reliability. Order your GTS 23 today and take the first step towards realizing your glass art dreams with precision and ease.

Chamber Dimensions 

23.5" Length x 13.5" Depth - 3.5 Cubic Feet

(59.7 cm L x 34.3 cm D - 99 L)

Outer Dimensions

28.5" Long x 38.5" Wide x 26.5" High (with 8" stand)

(72 cm D x 98 cm W x 67 cm H)

Maximum Temperature

1800°F (982°C)


240 Volts, 30 Amps, 7,200 Watts, 60Hz, Single Phase.

Power Cord Plug Configuration - NEMA 6-50

Consult with an electrician for proper fuse panel, service wire size, receptacle, and fusing requirements. It is possible that this model, when used as intended for its expected purpose, may be defined as "continuous use". Continuous use is defined as continuous, full power on for 3+ hours.

Model is available in 200V, 208V, 220V, 230V, 380V, 400V, and 415V. Contact Pottery Pulse to request pricing for and/or all other specifications for these power configurations.

Model will operate properly on both 50Hz and 60Hz.

​Model is available in 3 phase Delta and Wye (380V, 400V and 415V) designs. Again, contact Pottery Pulse to request.

Shipping Weight

210lb. (95.5 kg) - Approx.

Shipping Method

​Freight Truck​​

NRTL Listing Agency - TUV Listed United States and Canada - Designed and Tested to CSA & U/L 499

California Prop 65

Studio Pro models may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Evenheat's 23-inch Legacy Design - GTS 23

Top Load

The GTS 23 is a top loading design and offers a chamber 23.5" diameter x 13.5" deep.

Top-down view of Top-loading lid opened on Evenheat GTS 23 Glass Kiln also showing electrical box-controller on right

Full Firebrick Design

The GTS 23 features a construction made entirely of firebrick.

In a glass kiln, firebrick is highly valued for its heat retention properties at the start of the firing process, helping to stabilize temperature fluctuations. Towards the end of the firing, it gradually releases this stored heat, facilitating a gentle and even annealing process, particularly beneficial over an annealing range. This quality not only enhances performance but also adds an aesthetic charm.

Including firebrick in the construction of any glass kiln is essential, and the GTS 23 embraces this by incorporating firebrick fully in its design.

Full shot view of opened Evenheat GTS 23 Glass Kiln fully constructed with Firebrick

Swing View Equipped

The GTS 23 comes equipped with temperature controls housed in Evenheat's Swing View Adjustable Enclosure.

This unique feature is a pivoting, swing-up enclosure, designed to enable rotation of the control panel to your preferred angle for comfortable viewing and programming. After adjusting the settings, you can easily lay it back down for clear visibility from anywhere in your studio. It's effortlessly simple.

The Swing View is especially compatible with touchscreen controls such as the TAP II, Icon+, and Icon, allowing for the ideal alignment of the viewing angle. This feature is sure to enhance your kiln experience.

Close up of Evenheat temperature controller in swing view enclosure

Relay Access Port

The GTS 23 is designed with Evenheat's innovative Relay Access Port, streamlining the process of relay replacement without the hassle of removing panels.

To access the mechanical relays, you just need to remove the access plate. This design eliminates the need to dismantle the control panel or navigate through complex internal wiring. The process is incredibly straightforward and efficient, requiring nothing more than a screwdriver.

Given the inevitability of mechanical relay failures over time, this user-friendly relay access port proves to be extremely convenient and practical.

opened relay access port on an Evenheat glass kiln

The GTS 23 offers a diverse range of control options, such as the Icon, RampMaster 3, Icon+, and TAP II.

Evenheat enhances the finest control platforms available by integrating Special Limits thermocouples for accurate temperature measurement and incorporating non-metallic faceplates. This improves Wi-Fi connectivity, ensuring exceptional performance with online applications.


The Icon controller, leveraging Bartlett Industries' sophisticated Spark platform, has transformed the industry with its state-of-the-art touchscreen technology, becoming the controller of choice for the GTS 23.

During the latter part of 2023, the Icon was put through rigorous field tests on the newest version of the Bartlett Spark platform. This venture was a collaborative effort between Bartlett, Evenheat, and other industry leaders, yielding impressive outcomes. The Icon's programming was lauded for its intuitiveness and user-friendliness, and its touchscreen interface earned widespread acclaim. Additionally, the Quiet Drive Solid State relay exhibited exceptional performance, marking the testing phase as highly successful.

Aligning with Evenheat's dedication to pushing the boundaries of control technology, the Icon enhances the Spark platform with notable improvements. It integrates Special Limits thermocouples for unmatched temperature accuracy and includes non-metallic faceplates to improve Wi-Fi reception, enabling smooth operation with the Bartlett online app. These innovations position the Icon as a leading controller in the industry, providing remarkable performance and value.

RampMaster 3

The RampMaster 3, originating from Bartlett Instruments' V6-CF platform, is expertly crafted for glasswork and shines in heat treating applications. It stands as a prime choice for those who favor a traditional interface, offering dedicated buttons and a clear display for straightforward operation.

RampMaster 3 controller panel as shown on Evenheat Glass Kilns

Featured in Evenheat Glass Kilns, the RampMaster 3 controller panel exemplifies Evenheat's dedication to producing top-tier control systems.

Maintaining Evenheat's standards of excellence, the RampMaster 3 incorporates a Special Limits thermocouple to ensure precise temperature measurements. Coupled with the Quiet Drive Solid State relay system, the RampMaster 3 promises exceptional performance while maintaining a user-friendly, classic interface. This controller is ideal for craftsmen and artisans who appreciate a blend of classic usability with advanced technological features.


The Icon+, born from the distinguished Bartlett Genesis framework, revolutionizes controller technology standards. It features Special Limits thermocouples for unparalleled accuracy, and its design includes a non-metallic faceplate, significantly enhancing Wi-Fi reception. This improvement is vital for flawless integration with the Bartlett online app, propelling the Icon+ into a new era of controller functionality.

The Icon+'s interface, designed with user convenience in mind, ensures a smooth and effective user experience. When paired with the innovative Quiet Drive Solid State Relay system, the Icon+ stands out as a transformative innovation in the industry. It represents a seamless blend of Bartlett's technical expertise and Evenheat's dedication to pushing the envelope in control technology, marking a substantial leap forward in the field.


The TAP II, a standout in Evenheat's lineup of controllers, features a large display and user-friendly interface, ensuring remarkable ease of use. It simplifies the creation and monitoring of firing schedules, perfectly blending ease of operation with precision. Echoing the qualities of the Icon+, the TAP II is also equipped with Special Limits thermocouples and non-metallic faceplates, enhancing Wi-Fi reception for a stable connection with the SDS online app.

Choosing the TAP II translates to selecting a control experience that is both effective and uncomplicated. Its seamless integration with the online app, combined with accurate temperature control capabilities, renders the TAP II an ideal selection for artists and craftsmen who value a harmonious mix of functionality and user-friendliness in their kiln operations.

Want to avoid the drawbacks and maintenance costs associated with mechanical relay failures?

The Evenheat Quiet Drive Solid State Relay System represents a peak in kiln innovation. Characterized by its lack of mechanical components, this sophisticated system guarantees a hassle-free, maintenance-free operation with lasting dependability. Its ability to provide consistent and accurate heating leads to exceptionally high-quality outcomes.

Close up of Evenheat Kiln's Quiet Drive Solid State Relay

Solid-State Relays: Revolutionizing Kiln Technology for the Future

Solid-state relays (SSRs) mark a major step forward from traditional mechanical relays that rely on physical contacts and electromagnets. By using solid-state semiconductors, SSRs eliminate moving parts, reducing wear and significantly improving temperature control in kilns.

Advantage 1 - Superior Durability: SSRs are renowned for their extended service life, free from the mechanical wear and electrical arcing typical of mechanical relays. Unlike mechanical relays, which are known for their characteristic clicking sound indicating wear, Evenheat's SSRs operate quietly and with high reliability, greatly prolonging their lifespan to match that of your kiln.

Advantage 2 - Exceptional Temperature Control: Mechanical relays usually cycle every 10 to 14 seconds to balance control with lifespan, whereas SSRs can cycle as frequently as 120 times per second. This rapid cycling allows for quick adjustments and exceptional temperature control. All Evenheat control systems, including the sophisticated Icon controller, benefit from this, achieving unparalleled temperature accuracy.

Advantage 3 - Increased Heating Element Longevity: SSRs employ Zero Crossing technology, activating at the zero-voltage point of AC power cycles. This method helps extend the life of heating elements by maintaining optimal voltage levels, an advantage absent in mechanical relays.

Design Excellence - 30 Amp Capacity: Evenheat chooses 30-amp rated SSRs but operates them at a conservative 15 amps. This approach provides a significant safety margin, ensuring the SSRs remain within their derating curve even at a 15-amp load, resulting in cooler operation and extended lifespan, a testament to Evenheat's commitment to superior design.

Design Excellence - Externally Mounted SSR Heatsinks: The effectiveness and lifespan of SSRs greatly depend on proper cooling. Hence, Evenheat has strategically mounted SSR heatsinks externally, facilitating airflow and preventing heat buildup inside the control box. This design approach minimizes heat transfer to the SSRs and includes standoffs to create an air gap for additional cooling. This meticulous design ensures optimal SSR performance, as demonstrated by an impressive six-year track record of zero failures.

Estimated order to ship lead time is 6 weeks.

Pottery Pulse ships orders FREE to customers within the lower 48 contiguous United States (including the District of Columbia).

We don't want to mess around with fine print and extra charges, we
like things to be simple and easy.

Free is pretty easy.

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.

  • Price Match Guarantee. Best prices online guaranteed.
  • 30 Day Easy Returns. Changed your mind? We'll take it back no questions asked.
  • Super amazing service. Great service isn't enough these days, is it? We pride ourselves on the best service, anywhere.

Customer Reviews

Be the first to write a review