Hot Shot 18A - The Annealing Cabinet
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Original Price
$5,172.00
Current Price
$4,558.00
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Hot Shot Ovens & Kilns · Glass Kiln · Annealing Cabinet
Hot Shot 18A Annealing Cabinet
Purpose-built annealing cabinet with precision temperature control for glass artists working with rapid cooling schedules and controlled stress relief. Front-loading clamshell design with solid state relay for smooth, even heat distribution across the 18-inch cubic chamber. Operates on standard 120V household power or upgradable to 240V for faster recovery times.
Max temperature1100°F
Interior chamber18″ × 18″ × 18″
Voltage options120V or 240V
Control systemSolid state relay standard
What’s included
Solid state relay control
Precision temperature management with smooth power modulation eliminates hot spots during critical annealing cycles
Front-loading clamshell design
Easy access to the full 18-inch chamber depth for loading and unloading finished glass work
2-inch insulating brick
Efficient heat retention for maintaining stable annealing temperatures with minimal power consumption
120V standard configuration
Plugs into standard household outlet; field-convertible to 240V for enhanced performance
Balanced heating elements
Strategically positioned elements ensure uniform heat distribution throughout the annealing chamber
Reinforced steel jacket
Durable powder-coated exterior with integrated stand for studio floor installation
Technical specifications
Model numberHS-18A
Interior dimensions18″W × 18″D × 18″H
Chamber capacity3.4 cubic feet
Brick thickness2 inches
Maximum temperature1100°F
Voltage (standard)120V single phase
Voltage (optional)240V single phase
Amperage (120V)15 amps
Wattage (120V)1800 watts
Breaker requirement (120V)20 amp dedicated circuit
Plug configuration (120V)NEMA 5-15P (standard household)
Control typeSolid state relay with digital controller
Door designFront-loading clamshell
Estimated shipping weight225 lbs
Optional accessories
240V conversion kit
Upgrade to 240V operation for faster heating and recovery times between annealing cycles
Kiln shelf set for glass
Mullite shelves sized for the 18-inch chamber, heat-resistant to 1100°F for proper glass support
Digital pyrometer upgrade
Enhanced temperature monitoring with Type K thermocouple for precise annealing schedule verification
Fiber paper and shelf primer
Essential kiln wash and separator materials for glass fusing and slumping work
Atmosphere port kit
Add controlled atmosphere capability for specialized glass techniques requiring inert or reducing conditions
Emergency parts kit
Backup heating elements, thermocouple, and critical components for minimal studio downtime
Controller upgrade
Genesis Touchscreen — Bartlett InstrumentsRecommended
Replace the standard digital controller with Bartlett's Genesis touchscreen for advanced multi-segment programming, custom annealing schedules, and real-time firing data. Ideal for glass artists running complex cooling curves or managing multiple project types.
- Full-color 4.3-inch capacitive touchscreen with intuitive interface
- Store up to 100 custom firing programs with 32 segments each
- Delay Start function lets you schedule firings to begin automatically
- Real-time cone offset adjustment for precise annealing point control
- Thermocouple offset calibration ensures accuracy across the temperature range
- USB data logging exports complete firing history for production records
Common questions
What's the difference between annealing, fusing, and slumping temperatures?
The HS-18A is optimized for annealing (stress relief) at temperatures typically between 900°F–1050°F, where glass is held at a stable temperature to equalize internal stresses. While this kiln reaches 1100°F, it's not designed for full fusing (1400°F+) or most slumping work (1200°F–1350°F). It excels at controlled cooling schedules and maintaining precise hold temperatures for thick glass pieces that need extended annealing cycles.
Can I add atmosphere control for flame-working or specialized techniques?
Yes, the HS-18A can be fitted with an optional atmosphere port kit that allows you to introduce inert gases or create reducing atmospheres. This is useful for certain dichroic treatments, metal inclusion work, or preventing devitrification on sensitive glass compositions. The solid state relay control maintains stable temperatures even when atmosphere flow is introduced.
Should I run this on 120V or upgrade to 240V?
The 120V configuration is convenient for studios with standard outlets and works well for typical annealing schedules where slow, controlled heating isn't time-sensitive. Upgrading to 240V provides faster recovery between cycles and better performance if you're running the kiln continuously or need quicker ramp rates. Your electrician can convert the kiln in the field—it requires a dedicated 240V circuit and appropriate breaker sizing.
What controller should I choose for complex annealing schedules?
The standard digital controller handles basic ramp-hold programs suitable for most annealing work. If you're managing multiple glass types (soft vs. hard glass, varying thicknesses) or need to store and repeat specific cooling curves, the Genesis Touchscreen upgrade provides 100 programmable slots with 32-segment capacity. It's especially valuable for production studios or artists working with thick cast glass that requires elaborate cooling schedules.
Is my purchase covered under warranty if I buy from Peach State Pottery?
Yes. Peach State Pottery is an authorized Hot Shot Ovens & Kilns dealer, which means your HS-18A is covered by the manufacturer's one-year limited warranty. You must register the kiln within 30 days of delivery to activate coverage. Warranty is only valid when purchased through authorized dealers—gray market or used kilns are not covered.
Not sure if the HS-18A is the right annealing cabinet for your glass studio?
Our kiln specialists can help you evaluate chamber size, voltage options, and controller features based on your annealing workflow and production volume.
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