Adwest is a global leader in thermal and catalytic oxidizer design, manufacturing, and installation to reduce volatile organic compounds (VOCs.)

A leader in thermal and catalytic VOC abatement solutions, Adwest custom designs and manufactures highly efficient Regenerative Thermal Oxidizers (RTO), VOC concentrators, Direct Fired Thermal Oxidizers (DFTO) and catalytic oxidation solutions. These systems are used for the abatement of volatile organic compounds (VOCs), gaseous toxic fumes, hazardous air pollutants (HAPs), odors from process emissions, hydrocarbons, and acid gas process-laden streams for customers around the globe.

Founded in 1988, Adwest began providing compact, skid-mounted and cost-effective VOC air abatement solutions to a wide range of industries. It was a pioneer in compact electric RTOs with flameless NGI operation, which provided NOx-free operation – an industry first.  Adwest then began providing point source small-trailer and skid-mounted electric RETOX RTOs for soil remediation and soil vapor extraction, as well as halogenated point source chemical process VOC abatement. Due to the high efficiency, reliability, and cost-effectiveness of Adwest solutions, the markets served rapidly expanded into pharmaceuticals, paint finishing, composites, fiberglass, spray booths, chemical processing, food processing, metal litho, flexible packaging, flexographic and web offset printing, wood products and resin manufacturing, asphalt and metal/chemical/food recycling.

The RETOX 2 chamber RTOs were introduced in 1993, with larger multi-chamber units following soon after. Adwest oxidizers and concentrators are controlled by the proprietary Adwest PLC Control System with ethernet data logging. This unique system allows our customers to continuously monitor their equipment and process with online telemetry diagnostic capabilities, resulting in a reduced chance of dangerous issues and costly shutdowns.

Regenerative Thermal Oxidizers (RTOs) have proven to be the most cost-effective and reliable VOC control technology for efficient VOC abatement. Thermal abatement leaves no carbon to dispose of and they provide consistently high levels of VOC removal, with 99%+ capabilities, making even harshest processes safer for the environment and community.

Since joining CECO Environmental in 2012, Adwest has grown rapidly, with over 1,200 installations worldwide. Our team has over a century of combined experience in pollution control applications, providing trusted solutions in dozens of industries. A major advantage of choosing Adwest as your equipment provider is the high-level shop assembly of all units, which provides our clients with rapid and cost-effective equipment installation, leading to minimal time spent on field assembly. We know that time is money and make every effort to make the most of our customers’ investment.

Adwest now serves a multitude of industries and applications across the globe, providing trustworthy and efficient air pollution and odor-control technologies in even the harshest of environments.

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Adwest has been a pioneer and leader in the design of alloy Regenerative Thermal Oxidizers (RTO) for acid gas and halogen laden process VOC streams in a wide range of industries, including pharmaceuticals, auto metal mega-shredders, bakery ovens, composites, EPS styrene, soil vapor extraction/SVE, chemical resin manufacturing and printing applications.

RETOX RTOs have been designed in stainless alloys, as well as duplex alloys up to C2076 Hastelloy. We also offer Titanium RTO designs for optimal corrosion resistance. Our poppet valve flow control is custom designed in-house and provides a simple, lower cost and lower maintenance RTO flow control system compared to hydraulic butterfly valves or complex rotary indexing valve designs. Our zero leakage Adwest poppet valves allow our RTOs to achieve 99% or greater destruction rate efficiency (DRE).

See our complete Regenerative Thermal Oxidizer (RTO) Landing Page!




The Food & Beverage manufacturing industry contains companies involved in processing raw food materials, packaging, and distribution. This includes fresh, prepared foods as well as packaged foods. CECO Environmental delivers proven products and systems for a wide range of emission control, filtration and fluid handling challenges including volatile organic compound (VOC) abatement, mist elimination, acid gas scrubbing, dry particulate filtration, industrial dust, fume, mist and air handling systems, fluid handling, filtration, and fume hood exhaust.

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Yes! Adwest custom designs and manufactures thermal oxidizers from just 100 SCFM single canister units to extremely large 100,000+ SCFM multi-canister systems. These larger multi-can units provide up to 99% Destruction Rate Efficiency (DRE), with heat recovery capabilities up to 97%.

Adwest has over three decades of experience providing technologies and solutions to a wide variety of industries across the globe. From oil and gas to food and beverage, and industry in between, Adwest has provided over 1,200 completely different solutions for some of the harshest and most challenging applications on the planet, including:

  • Paint spray booths and finishing
  • Paint and varnish manufacturing
  • Surface coating and wood finishing
  • Metal litho, foil and coil coating
  • Concentrators and spray dryers
  • Web converting and laminating
  • Flexible packaging/flexo printing
  • Dryers, ovens and roasters
  • Web, offset, gravure and inkjet printing
  • Chemical and pharmaceutical processes
  • Ethanol, biofuels and food processing
  • Oil, gas and geothermal processing
  • Halogenated VOCs, CO venting and amines
  • Air strippers and soil remediation
  • Microelectronics and semiconductor
  • Solvent recycling and megashedders
  • Composites, gelcoat and EPS styrene

Adwest has been a pioneer at the forefront of innovation and technology development for decades. Our extensive experience and forwarding thinking team of experts pride themselves on providing the most reliable and efficient solutions in the industry. We were one of the first to provide NOx-free operation with flameless natural gas injection (NGI) on our units and continue to supply only the Best Available Control Technologies (BACT) to our customers. There is a reason we have so many customers returning to us for service and new projects.

Adwest contact


Fullerton, CA, USA

Phone: 714-632-9801



Shanghai, China

Phone: +86 21-54222502