Kiln and lehr zone temperatures held within ±2°C — preventing glaze defects and thermal stress.
No combustion gas in kiln chamber or drying drum — no carbon deposits, no discolouration.
kW Heat Output
Single and double-burner configurations for kilns, lehrs, and rotary drying drums.
Stone & Soil
Process
Heating
Indirect process heating for ceramics, glass, and aggregate drying operations.
Purpose-built indirect process heaters for the stone and soil industry. From ceramic tunnel kilns and glass annealing lehrs to rotary drying drums for sand and mineral aggregates — clean, precise, contamination-free thermal energy.
Stone & Soil
Applications
Select an application to see how our process heaters address your specific stone and soil industry heating needs.
Ceramic firing and glass annealing demand stable, contamination-free heat across every zone of the kiln or lehr. Temperature variation as small as ±5°C between shelf positions produces uneven shrinkage, glaze crawling, and stress fractures that destroy entire kiln loads. Our indirect process heaters deliver 750–2,500 kW of modulating thermal output to tunnel kilns, shuttle kilns, and glass annealing lehrs — holding zone temperatures within ±2°C without introducing combustion gases into the product chamber.
Indirect Heating
No combustion gas in kiln chamber
Zone Precision
±2°C across kiln and lehr zones
Smart Controls
Modulating burners with PLC automation
20+ Year Life
Free-floating tube bundle design
Built for
Stone & Soil Industry
Key advantages of indirect process heaters for ceramics, glass, and mineral drying operations.
No Combustion Gas in Product
Indirect heat exchange keeps combustion gases completely separated from kiln chambers and drying drums — no carbon deposits on ceramics, no discolouration of filler sand.
Precise Zone Temperature
Modulating burners maintain kiln and lehr zone temperatures within ±2°C — eliminating uneven shrinkage, glaze defects, and thermal stress in ceramic and glass products.
750 kW to 2500 kW Output
Single and double-burner EcoHeat configurations scale from small batch shuttle kilns to continuous tunnel kilns and high-throughput rotary drying drums.
Multi-Fuel Flexibility
Natural gas, LPG, or biogas — switch fuel source to match site infrastructure and energy contracts without any burner modification.
20+ Year Service Life
Free-floating tube bundle absorbs continuous thermal cycling in high-temperature kiln environments without stress cracking — built for round-the-clock industrial operation.
Rapid Startup & Recovery
Cold to full output in ~30 minutes. Rapid recovery after kiln door cycles and drum load changes — keeping production throughput on schedule.
Built to Fit
Your Operation
Drop-in heat source for your existing kiln, annealing lehr, or rotary drying drum — standard connections, minimal downtime.
Clean Heat In.
Perfect Product Out.
Combustion gas in a kiln chamber deposits carbon on glazed surfaces and shifts clay body colour. In a drying drum, direct flame discolours filler sand and damages mineral coatings. EcoHeat indirect heaters seal all combustion products inside the heat exchanger — only clean, temperature-controlled air reaches your product. No contamination, no colour shift, no rejected loads.
Indirect heating eliminates combustion gas contact with kiln atmosphere — removing the sulphur compounds that cause glaze crawling, bloating, and colour deviation.
Clean hot air delivery prevents carbon staining and surface discolouration of filler sand and mineral aggregates — keeping output within specification and grading compliance.
Modulating burners maintain lehr zone temperatures within ±2°C for controlled stress relief — preventing spontaneous fracture from uneven cooling profiles.
Modulating burners maintain lehr zone temperatures within ±2°C for controlled stress relief — preventing spontaneous fracture from uneven cooling profiles.
Stone & Soil
FAQs
Common questions about using indirect process heaters for ceramics, glass, and aggregate drying applications.
Stone & Soil
Consultation
Our engineering team specialises in stone and soil thermal solutions. Tell us about your kiln, lehr, or drying drum heating requirements.
- Ceramic kiln heating
- Glass annealing lehr heating
- Rotary drying drum heating
- Retrofit & integration planning