Charcoal and wood-fired cooking — increasingly popular in premium restaurants — generates exhaust that is fundamentally different from gas or electric cooking. Higher temperatures (300-800°C at the fuel bed), large quantities of ash, live embers, and complex smoke chemistry require specialized purification approaches beyond standard ESP configuration.
| Parameter | Specification |
|---|---|
| Key Challenges | Very high exhaust temperature (up to 200°C at intake); Ash and embers (damage ESP cells); Creosote/tar compounds (sticky, hard to clean); Intermittent very high particulate load |
| Recommended Configuration | Water spray pre-treatment (SPL Series) OR cyclone pre-filter + high-temperature ESP cell |
| Fire Safety | Spark arrestor upstream of ESP essential; Fire-rated duct between grill and purification; Automatic fire suppression recommended |
| Model Recommendation | SPL-60 (water spray for heavy charcoal) or Heavy-duty Series with high-temp modifications and cyclone pre-filter |
Application Scenarios
- Josper charcoal oven restaurant (Barcelona): A restaurant centered on Josper charcoal ovens (Spanish closed-charcoal grills) specified SPL-60 water spray pre-treatment before Heavy-duty Series ESP. The water spray captures ash and embers, cools the exhaust from 150°C to 40°C, and captures approximately 60% of particulate — dramatically reducing the load on the downstream ESP. The system has operated for 3 years with quarterly ESP cell cleaning (vs monthly without water spray).
- Wood-fired pizza restaurant chain (Naples, Italy): A Neapolitan pizza chain with wood-fired ovens at 800-900°F (425-480°C) dome temperature installed Souniny SPL units for exhaust treatment. The water spray serves a dual purpose: particulate control and critical fire safety (any ember drawn into the duct is immediately extinguished). Italian fire safety regulations (Prevenzione Incendi) for wood-fired cooking in commercial premises specifically require spark arresting — the SPL satisfies this requirement.
- American BBQ smokehouse (Texas, USA): A Central Texas BBQ restaurant operating offset smokers 24 hours daily installed Heavy-duty Series with high-temperature modifications and cyclone pre-filter. The key modification: ESP cells with increased plate spacing (10mm vs standard 8mm) to handle the sticky creosote compounds in wood smoke that would bridge standard-spaced plates. The cyclone captures 80% of large particulate, and the modified ESP handles the remaining fine smoke. Cell cleaning interval: 4-6 weeks (vs 1-2 weeks for standard cells).
- Argentine asado restaurant open kitchen (Buenos Aires): A parrilla (Argentine grill) restaurant with open kitchen asado (wood-fire grilling visible to diners) installed Cabinet-Cabinet Purifier units with flexible duct intakes positioned near the grill. The portable format was chosen because the restaurant is in a historic building where fixed duct installation was prohibited. The units capture smoke at the source without overhead hoods that would interfere with the open-kitchen visual experience.
