Trust our team of experts. Coward Environmental Systems, Inc. (CESI) has been supporting the airflow industry for over 75 years. Dedicated to our customers, we partner with you on all your air handling and indoor environment needs.  

CESI represents leading commercial systems in cooling and heating air handling units for pharmaceutical, healthcare, and education industries.  We can help create fully integrated systems customized for size and function and can include features that control a precise temperature and humidity

Areas of Expertise

We help clients with every detail of the entire AHU and ERU specification process – from design to production. CESI combines the strictest standards of project management, proven know-how, and almost four decades of commercial HVAC and air handling experience.



AHUs in commercial spaces  provide a healthy, comfortable, and efficient built environment.  Beyond that, monitoring airflow is necessary to regulate indoor air quality, energy usage, building pressurization, and humidity control. Coward Environmental represents airflow monitoring manufacturers that offer best-in-class solutions and a wide array of products to fit nearly any design.



Healthy spaces, clean rooms, and precision manufacturing all demand a higher level of purified air and surfaces. Facilities that need to remove or destroy pathogens, viruses, germs, and other microbial particles can work with Coward Environmental Systems, Inc. We help our clients manage a range of unseen risk factors that can compromise occupants or procedures.



CESI offers a variety of advanced products that deliver energy-efficient solutions for any cleanroom application. Our cleanrooms maintain a controlled environment that virtually eliminates pollutants, including aerosol particles, chemical vapors, dust, and airborne microbes.



Our prefabricated central utility plants and penthouses save time, money, and ensure the attention to detail provided by assembly in a controlled environment. Constructed and tested offsite, each prefab option is easy to transport and is installed quickly onsite, avoiding construction deadlines and interference from other building trades.



Coward Environmental helps our clients size and select efficient air-cooled, water-cooled, adiabatic cooling, and dry air cooling systems. Our wide selection of cutting-edge chillers, condensers, and coolers, allow our team to drive whole-life ownership costs down while mitigating mechanical risks.



Each of the custom fans CESI offers, from blowers to plume fans, is designed to suit a particular use and a specific function. Our sales engineers understand the differences among these product lines and the applications they serve, and can quickly determine the best choice for any project. We help clients identify efficient custom fan solutions, regardless of the design intricacies.



We work with leading manufacturers of dehumidification equipment around the world to provide the best solutions. Our engineering department helps clients identify systems that work with their build, energy requirements, facilities, and the unique dehumidification challenges presented by the various industries served.



Our sales engineering department helps size and specify sophisticated technology designed for toxin collection, scrubbing, extraction, and environmental purification, regardless of the application.


Enthalpy and Heat wheels, made of a thermally conductive material, play a pivotal role in various heating, ventilation, and air conditioning (HVAC) systems, recovering up to 90% of the heat that would otherwise be lost in the exhaust air stream

CESI provides high-quality geothermal and WSHP systems in a range of sizes, designs, and types of exchange fields. CESI sales engineers help clients create zone-by-zone air control, helping clients navigate the considerations specific to each build and application.




Our humidifier manufacturers continue to introduce sophisticated innovations that allow engineers to create solutions that stabilize humidity, maintain occupant health and comfort, and provide more consistency to a wide range of medical applications and industrial processes.



Even at the microbial level, the air in operating rooms must be closely monitored and meticulously maintained. A properly-designed OR air system continuously meets demanding standards. Coward Environmental’s engineering department understands the unique challenges faced by OR design professionals, and offers the products needed to address them.
Pump skids are pre-engineered and prefabricated pump systems. These self-contained, compact systems contain one or more pumps, a control panel, valves, and piping mounted on a skid. In commercial HVAC systems, pump skids circulate fluids for chilled and hot water and energy recovery and rejection.

Engineers continually combine and customize air handling and environmental systems to meet a wide range of client needs. CESI works with many leading manufacturers from around the globe to offer a variety of products, parts, features, and enhancements to meet the needs of any application, commercial or industrial.