Developing Quality Solutions to Combat Unique Building Threats

JENSEN HUGHES evaluates airflow within buildings to determine the impact of normal building contaminants and industrial gases, as well as chemical, biological, radiological, and nuclear (CBRN) threats. Our engineers use building airflow and CFD models to construct detailed models of buildings, including the building ventilation systems. The models are used to assess the impact of various forces impacting airflow (such as HVAC systems, wind driven flows, and stack effect flows). The impact of HVAC system sequence of operations changes and varying building conditions can be evaluated, as well as the impact of filtration systems, and placement of vents.

For our building airflow modeling brochure and capabilities list click here.

CBRN Modeling

Terrorist attacks involving CBRN materials are of particular concern to high profile government and military facilities, commercial buildings, corporate campuses, and assembly spaces. Detailed computer models have been developed by JENSEN HUGHES engineers to assess the impact of CBRN events. Picture_Section 1 - Services_Specialty Eng Services_Building Airflow ModelingWe use these models to evaluate agent spread under a variety of building conditions, and to evaluate the effectiveness of various mitigation strategies. Filtration, ventilation, and compartmentation have been shown to be effective strategies, alone or in combination, to protect buildings. Analysis can be performed to site chemical or biological agent detectors, either externally to a building or within a building, and to create a targeted HVAC response that is initiated either manually or automatically.

JENSEN HUGHES has constructed computer models that were used to model the impact of CBRN events on the new World Trade Center complex in New York City, the Pentagon office building, and other government/military buildings. JENSEN HUGHES engineers developed the HVAC protocols integrated into the operational Pentagon Shield System that protects the Pentagon in the event of a CBRN attack.

Indoor Air Quality (IAQ)

Picture_Section 2 - Services_Specialty Eng Services_Building Airflow ModelingGaseous and particulate contaminants have the potential to work their way into a building’s heating and air conditioning system and in high enough concentrations can cause problems for building occupants. Indoor air quality (IAQ) problems can lead to a phenomenon known as “sick building syndrome”. Building airflow modeling can be used to track the spread of contaminants such as ozone, volatile organic compounds (VOCs), pesticides, molds, asbestos/fiberglass insulation, construction dust/debris, and combustion fumes (from loading docks or other areas) within buildings. Models can then be used to evaluate modifications to building HVAC systems that can mitigate the problems found and improve air quality.

Building Airflow Analysis

Picture_Section 3 - Services_Specialty Eng Services_Building Airflow ModelingBuilding airflow models can be used to evaluate a wide arrange of issues concerning buildings. Proper balancing of air flows to achieve desired heating/cooling levels can be evaluated in most buildings using models. Industrial process buildings and laboratory buildings often utilize fume hoods and pressurization to contain hazardous substances to pre-defined areas of buildings. Modeling can be used to either design these systems or aid in the balancing of these systems to achieve desired airflows under a range of operating conditions, while not creating undesired overpressure conditions that could either damage ductwork or impede occupant egress.


Contact Us Today:

Contact us today using our online form or by contacting one of our many regional branches.  For specific questions regarding JENSEN HUGHES’ specialty engineering services, please contact:

Mike Ferreira
410-737-8677  x284