Industrial process exhaust
Local exhaust ventilation for tanks, mixers, grinding, welding, cutting and packaging lines: hood design, capture velocity, duct transport velocity and fan selection.
ACGIH Industrial Ventilation · O. Reg. 851 · Reg. 833VENTILATION ENGINEERING
Industrial & Mining Ventilation Engineering
Local exhaust, dust collection, make-up air and ventilation assessments for industrial plants, mines, mineral processing and special-purpose facilities—designed to ACGIH practice and the codes that govern toxic, combustible and explosive atmospheres.
HOW IT WORKS
Capture at the source. Replace what you exhaust.
LOCAL EXHAUST + MAKE-UP AIR3D · LIVE
A capture hood draws contaminants from the process into the exhaust duct and roof fan, while the make-up air unit replaces the exhausted air with tempered outdoor air.
Contaminated air to exhaustMake-up (supply) air
Conceptual 3D illustration · Not a design drawing
APPLICATIONS
Where we design ventilation.
Every system starts with the contaminant, the process and the regulation that governs it. EEB identifies those first, then sizes hoods, ducts, fans and make-up air to match.
Combustible dust & explosive atmospheres
Dust collection and exhaust for combustible dusts, vapours and gases, coordinated with the dust hazard analysis, explosion prevention and deflagration venting.
NFPA 660 · NFPA 69 · NFPA 68 · NFPA 91Mining & mineral processing
Ventilation and dust control for concentrator buildings, crusher houses, conveyor galleries, storage domes and process plants, including quantitative ventilation assessments.
Ontario Reg. 854 (Mines) · ACGIH · provincial OHS regulationsSpecial-purpose facilities
Battery and charging rooms, laboratories, spray and finishing areas, hazardous process rooms and manufacturing of energetic or flammable products.
NFPA 69 · NFPA 91 · ASHRAE 62.1 · OBCMake-up air & building pressure
Make-up air units sized to the exhaust they replace, with heating, controls and interlocks, so doors, combustion appliances and capture hoods keep working in winter.
ASHRAE 62.1 · OBC Part 6Commercial kitchens & buildings
Hood exhaust and make-up air for restaurants, and outdoor-air ventilation for offices, schools and places of worship.
NFPA 96 · ASHRAE 62.1 · OBCDESIGN METHOD
Engineered to ACGIH practice.
Industrial ventilation is a system: if one element is undersized, contaminants escape at the hood or settle in the duct.
- Hood selection and capture velocity at the point of release
- Duct transport velocity that keeps dust airborne
- System pressure loss and fan selection on the fan curve
- Air cleaning: dust collectors, scrubbers and filters
- Make-up air balanced to the exhaust, with winter heating
- Explosion prevention and venting where the material is combustible
CODES & STANDARDS
The requirements we design to.
ACGIH Industrial Ventilation: A Manual of Recommended Practice for Design
The design method for hoods, capture velocities, duct transport velocities and system pressure losses. ACGIH Threshold Limit Values (TLVs) inform exposure targets.
ASHRAE 62.1
Ventilation for acceptable indoor air quality: outdoor-air rates for occupied spaces, exhaust rates and air classification.
NFPA 69
Explosion prevention systems: oxidant control, combustible-concentration reduction, isolation and suppression for vessels, ducts and collectors.
NFPA 68
Explosion protection by deflagration venting for dust collectors, silos and process enclosures.
NFPA 660
Combustible dusts and particulate solids, consolidating the former NFPA 652, 654, 655, 664 and related standards.
NFPA 91
Exhaust systems for air conveying of vapours, gases, mists and particulate solids: duct construction, clearances and fans.
NFPA 96
Ventilation control and fire protection of commercial cooking operations.
Ontario regulations
O. Reg. 851 (Industrial Establishments), Reg. 833 (exposure to biological or chemical agents), Reg. 854 (Mines and Mining Plants) and OBC Part 6. Out-of-province projects follow the applicable provincial regulations.
EXISTING FACILITIES & MINES
Ventilation assessments.
For operating plants and mine sites, EEB reviews installed systems, process data and exposure information, calculates the required ventilation and reports where the facility falls short—with practical upgrade options.
Typical assessment scope
- Review of drawings, equipment data and process information
- Quantitative ventilation and capture calculations against the governing regulation
- Compliance gap summary
- Upgrade options with budget-level comparison
- Design and permit drawings for the selected upgrade
Designed with the whole facility
Ventilation interacts with heating, process equipment, fire protection, electrical and structure. Because EEB designs those disciplines in-house, fans, make-up air units, collectors, duct penetrations, roof supports, interlocks and gas detection are coordinated on one drawing set.
Sealed design: drawings and calculations are sealed by a licensed Ontario P.Eng.
PROJECT SUPPORT
Start with a defined scope.
Send your building location, available drawings, required services and target schedule. EEB will discuss the technical requirements and prepare an appropriate proposal.
Request an estimate →QUESTIONS
Frequently asked questions
Which standard do you use to design industrial exhaust?
Hoods, capture velocities, duct velocities and fan selection follow ACGIH Industrial Ventilation: A Manual of Recommended Practice for Design, checked against the exposure limits in Ontario Reg. 833 and the requirements of O. Reg. 851, ASHRAE 62.1 and the applicable NFPA standards.
Do you design ventilation for combustible dust and explosive atmospheres?
Yes, within a defined scope. EEB designs source capture, transport velocities and collector arrangements using the process information and dust hazard analysis, coordinated with NFPA 660, NFPA 69 explosion prevention, NFPA 68 deflagration venting and NFPA 91 exhaust system requirements.
Do you work on mining and mineral processing projects?
Yes. EEB carries out ventilation and dust-control design and quantitative ventilation assessments for concentrator buildings, crusher houses, conveyor galleries, domes and process plants, working to the mining regulation of the province, such as Ontario Reg. 854.
Why does an exhaust system need make-up air?
Every cubic metre exhausted must be replaced. Without make-up air the building goes negative: doors are hard to open, combustion appliances backdraft and hoods lose capture. EEB sizes make-up air units to the exhaust they replace, with winter heating and interlocks.
Can you check whether our existing ventilation meets the regulations?
Yes. EEB reviews the installed systems and process information, calculates the required ventilation and reports compliance gaps with practical upgrade options.
What do you need from me to quote ventilation work?
The facility type, the processes and contaminants involved (safety data sheets and any dust hazard analysis), floor areas and heights, existing equipment data, and any inspection order or exposure results you need to respond to.
START WITH A CONVERSATION