Service · Industrial Extraction · HRV/ERV · ATEX · Cleanrooms
Forced ventilation, industrial extraction, and air quality systems for kitchens, parking garages, warehouses, cleanrooms, and ATEX zones — engineered to DS 594, NFPA 96, ASHRAE 62.1, and ISO 14644.
Applications
Extraction hoods with grease filters, 16-gauge stainless steel ductwork, high-static-pressure centrifugal fans (500–1,500 Pa), and makeup air units for restaurants, hotels, casinos, hospitals, and industrial canteens. Airflow calculations per DS 594 and NFPA 96.
Jet-fan impulse ventilation systems with automatic CO/NO₂ sensor control. The system activates at 15 ppm CO and extracts until levels fall below 25 ppm (OSHA/DS 594 limit). For garages with more than 3 levels, CFD simulation is recommended to validate airflow patterns.
Sensible (HRV) and enthalpy (ERV) heat recovery units for offices, hotels, and clinics. Allows 100% fresh air renewal with less than 25% loss of HVAC energy. Integration with existing VRF and fan-coil systems via Modbus/BACnet controllers.
Explosion-proof (ATEX-certified) fans and ductwork for plants with potentially explosive atmospheres: solvent storage, agrochemical warehouses, gas processing facilities. Zone classification design (Zone 1/2 for gases, Zone 21/22 for dust) with EX-certified equipment selection.
Ventilation systems for pharmaceutical cleanrooms (ISO 7–8), laboratories (HEPA + differential pressure control), and server rooms (±1°C precision with CRAC/CRAH). Air change calculations per ISO classification and particle count validation for GMP certification.
Industrial warehouses, manufacturing plants, and distribution centers with assisted natural ventilation (louvered panels) or mechanical ventilation with indirect evaporative coolers for high heat-load zones. Sensible heat gain calculations and air distribution design for working environments.
Why D&Z Building
Computational fluid dynamics (CFD) simulation for parking garages, warehouses, and complex-geometry spaces where empirical design is insufficient.
Revit MEP modeling for coordination with structural, architectural, and other building systems. Clash detection before construction.
BMS integration with CO/NO₂ sensors, smoke detectors, and Modbus/BACnet controllers for autonomous operation.
We know DS 594, NFPA 96, ASHRAE 62.1, ATEX, and SEREMI health permit requirements. We prepare and accompany the permitting process.
Need a ventilation design?
Tell us your space type, surface area, occupancy, and applicable regulations. We will send you a preliminary design and cost estimate.
FAQ
Per NFPA 96 and ASHRAE 154, a commercial kitchen with open-flame cooking equipment needs 30–60 air changes per hour, depending on cooking load. The exhaust must exceed the supply (negative pressure in the kitchen) to prevent odors from migrating to the dining area. Exact airflow is calculated from installed cooking capacity (BTU/h) and equipment type (fryer, grill, combi-oven).
Enclosed parking in Chile is governed by DS 594 (Sanitary Conditions for Workplaces), which sets a CO limit of 25 ppm for 8-hour exposure. The OGUC (General Urban and Construction Ordinance) requires ventilation in enclosed parking for more than 5 vehicles. For facilities with more than 50 vehicles, NFPA 88A is recommended along with automatic CO/NO₂ sensors.
An HRV (Heat Recovery Ventilator) renews indoor air without discarding the energy used to condition it. It extracts stale interior air and, before expelling it, transfers its heat (or coolness) to incoming fresh air — at 70–85% efficiency. In an air-conditioned office, an HRV can reduce ventilation energy consumption by 30–40% compared to direct exhaust systems.
An extraction hood with grease filters, stainless steel duct, centrifugal fan, and makeup air unit for a 30–60-seat restaurant kitchen costs approximately UF 120–350 (Unidad de Fomento, Chile's inflation-indexed unit, ≈ USD 33 in 2025), depending on duct run length, filter count, and whether odor treatment is required (activated carbon or UV filtration). For hotel or industrial canteen kitchens, the complete system can exceed UF 800.
An ATEX zone (ATmosphere EXplosive) is an area where an explosive mixture of gases, vapors, or combustible dust with air can form. Zone classification (Zone 0/1/2 for gases, Zone 20/21/22 for dust) determines which equipment is permitted. In an ATEX zone, fans, motors, and control panels must hold EX certification (flame proof, pressurized, or intrinsically safe). Non-compliant installations can void the facility's insurance and create criminal liability in case of an incident.
Yes. We prepare the ventilation calculation report, duct layout drawings, and technical memorandum in the format required by the regional SEREMI de Salud. The sanitary permit for commercial kitchens (resolución sanitaria) requires demonstrating that the extraction system meets minimum airflow rates and that grease cannot accumulate in the duct. We accompany the client throughout the permitting process.
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