The Potterycrafts Heatworker 135L: Professional Front-Loading Kiln
The Potterycrafts Heatworker 135 Litre front-loading kiln is a premium ‘tubed’ kiln designed for potters, studios, schools, and colleges that demand the very best. Built for reliability and durability, this kiln uses an advanced tube-mounted element system that improves efficiency, reduces stress on the chamber, and extends lifespan. Call us now on 01206 648025 for our free kiln selection service. If the kiln is not the right one for you, the return is completely free.
Potterycrafts Heatworker 135L Capacity
With a firing chamber of 135 litres, this kiln is ideal for professional and educational use where large capacity and consistent results are essential.

Premium Construction
Constructed from durable low thermal insulation brick with two high-grade backup insulation boards, all enclosed within a high-quality pressed steel and powder-coated frame. The brick-to-brick door seal ensures a flush fit, reducing heat loss and increasing firing efficiency.
Advanced Tubed Element Design
Unlike conventional grooved-wall systems, the Heatworker 135L uses ceramic support tubes to mount the elements in free air, giving several advantages:
- Higher maximum temperature of 1320 °C.
- Reduced stress on elements and chamber walls.
- Improved efficiency as radiant heat enters the chamber directly.
- Easier element changes when required.
- Extended brickwork life as bricks are not weakened by grooves.
- Reduced risk of element failure causing brick damage.

Made in the Potteries
Designed and built in Stoke-on-Trent, England, Potterycrafts kilns are trusted across Europe for their tried-and-tested performance. Spare parts are always in stock at our factory, ensuring long-term support.
Safety Features
- Dual contactors and over-temperature monitoring prevent overfires (when paired with Potterycrafts controllers).
- Type R thermocouple for accuracy and durability.
- Roof and door vents provided as standard for safe venting and cooling.
- Captive interlock safety switch prevents operation unless locked securely.
- Fully ROHS and WEEE compliant.
Temperature Control
The Heatworker 135L is compatible with the following advanced controllers:
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CERA-10+ Controller: 32 programs with 32 segments each (ramp, target temp, hold period). Simple enough for basic use yet advanced for scientific, glass, or industrial applications.
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CERA-10+ WIFI Controller: All CERA-10+ features plus remote control via PC, tablet, or smartphone using the GATEway app.
Specifications
Internal Size: 41.5 cm (W) × 44 cm (D) × 69 cm (H)
External Size: 73 cm (W) × 94 cm (D) × 156 cm (H)
Capacity: 135 Litres
Weight: 290 kg
Power: 7.5 kW
Supply: Single Phase – 40 A (hard-wired by qualified electrician), or 3 Phase & Neutral – 15 A per phase (on request)
Maximum Temperature: 1320 °C (User max: 1300 °C; Application max: 1280 °C)
Warranty: 2 years (excluding elements)
Controller: Optional (CERA-10+ or CERA-10+ WIFI)