About Us


About Us

The Building Dynamics Advantage


Building Dynamics, LLC (BDL) is an independent engineering and industrial hygiene consulting firm specializing in HVAC systems, Indoor Environmental Quality (IEQ) and Energy Analysis.  BDL was founded in 1996 by Ed Light, Certified Industrial Hygienist (CIH), and James Bailey, Professional Engineer (PE), to provide clients with a multi-disciplinary perspective and cost-effect solutions to building issues and occupant concerns. Ed has been a nationally recognized leader in the IEQ field for 35 years, while Jim’s 40 year career in HVAC design and operation includes specializations in moisture control and building science.

Our technical expertise is rooted in hands-on experience with building operations and communication with stakeholders in contentious situations. We enjoy the challenges of problem-solving and welcome involvement in cutting-edge issues.

BDL consistently adds value to client projects by following a site-specific/evidence-based approach, teaming with site personnel and accessing state-of-the-art information.

Professional Affiliations

American Society for Heating, Refrigerating and Air-Conditioning Engineers
National Society of Professional Engineers
American Industrial Hygiene Association
International Society of Indoor Air Quality and Climate
American Society of Testing and Materials
International Code Commission: Green Building Standard Committee on IEQ
Washington Conservation Guild
Spray Polyurethane Foam Alliance
Maryland Homebuilders Association
American Society of Plumbing Engineers

We have consulted with and relied on Building Dynamics to address specialized industrial hygiene and HVAC needs for many years. While I have found their level of expertise and ability to work with the client impressive, it is their exceptional ability to quickly focus and resolve issues through the common sense application of scientific principles that clearly sets them apart.
— Randy Melvin, Director, Research and Codes Maryland/Virginia Homebuilder



Building Dynamics Services


BDL Environmental Services

Construction Process

Water infiltration and moisture condensation can become major issues on construction sites.  Similarly, dust and odor migration in occupied buildings under construction may result in health concerns and disrupt the construction process.  BDL has pioneered in the development of construction management programs for minimizing mold growth and protecting occupants during renovation and phased completion of new buildings.  As a consultant to general contractors and building owners, BDL has facilitated the timely completion of numerous projects by addressing these issues on a pro-active basis.  When needed, BDL provides rapid intervention to resolve unanticipated mold and air quality issues.  BDL’s work has demonstrated that most IAQ and moisture-related problems can be prevented by attention during design and construction.  Acceptable conditions at completion are established by BDL based on detailed inspection, not random air tests.

Indoor Air Quality

BDL's approach to IAQ recognizes the importance of understanding occupant concerns in the context of building operation. Many IAQ complaints involve maintenance issues which can be resolved in-house following the procedures outlined in the NIOSH/EPA publication Building Air Quality (co-authored by BDL President, Ed Light). BDL assists building owners and managers with complex IEQ issues, or when a third-party opinion is needed. Because IAQ studies based on air testing are inconclusive, BDL investigations emphasize building science and engineering analysis, bringing in medical professionals where specific health issues are presented. BDL offers practical, cost-effective solutions to IAQ problems. IAQ concerns may not be fully resolved unless stakeholders are involved in the process and all parties communicate effectively. BDL has a proven track record of effectively working with occupants to address their concerns.

Building Restoration

BDL provides practical, cost-effective solutions for addressing sites impacted by biological growth, smoke and chemical agents.  BDL considers mold growth to be unacceptable in buildings, but not a hazardous material. Mold assessment and clearance follows an engineering approach and does not rely on microbiological testing.  Flexible mitigation strategies are offered which ensure resolution of water damage while fully protecting occupants.  BDL personnel have hands-on experience managing restoration contractors.  BDL research has developed new protocols for the assessment of corrosive drywall emissions, smoke damage and residue from misapplication of spray foam.

BDL Engineering Services

Mechanical/Electrical Design

Building Dynamic’s engineering staff provides a full range of mechanical design services for new construction, renovations and special operations.  BDL develops construction drawings and specifications, while assisting with the bidding process, submittal review, construction  administration and project commissioning.  BDL’s design team has a thorough understanding of construction techniques, project phasing, standards and building codes, coupled with expertise in IEQ and energy conservation.  Coordination with other members of the design team and building operating personnel is emphasized.  We find that each building is unique and attention to design details is critical to providing an efficient and comfortable indoor environment. We strive for on-time completion within budget.

HVAC Evaluation

With a long history of involvement in building O&M, BDL offers practical solutions to questions involving controls, comfort, ventilation and mechanical hygiene.  BDL works closely with O&M personnel to identify root causes of HVAC problems and recommend cost-effective improvements which utilize existing equipment wherever possible.  BDL also provides comprehensive, system-wide assessments, including cost estimates for a range of alternative solutions.

Energy Management

BDL recognizes the importance of providing accurate information concerning a building’s energy consumption and energy saving opportunities.  BDL’s goal in evaluating energy conservation measures is to use economically viable technology without sacrificing IEQ and occupant comfort.  To accomplish this, it is important to collect detailed information concerning building operations and maintenance, utility rates, the building envelope, lighting systems, and mechanical systems.  Building operations and systems are simulated using computer programs to provide an accurate model of current energy consumption and energy savings potential.  Economic performance of ECMs is analyzed using simple payback, return on investment, or life cycle cost methods.

In every instance in which we have recommended clients to BDL, they have responded promptly and effectively to diagnose the cause of the problems at issue and resolve them. We have worked with BDL and its principles for over ten years and plan to continue to do so.
— Ronald E. Gots, MD, PHD, DABT, International Center for Toxicology and Medicine



Building Dynamics Portfolio


BDL Investigates IAQ at the South Pole

South Pole.jpg

Provided comprehensive assessment of HVAC systems and IAQ in South Pole Station research buildings.  Work included determining air change rates in buildings using Tracer Gas Decay methods and detailed testing for volatile organics.  BDL’s analysis was used by the National Science Foundation to support design of the new South Pole Station.




BDL Modernizes Middle School HVAC

Renovated middle school, replacing the boiler plant with high efficiency gas-fired pulse combustion condensing boilers, converting hot water and chilled water pumping systems to primary-secondary systems controlled with variable frequency drives and replacing local HVAC equipment.  BDL also monitored IAQ in occupied areas during construction.

BDL Modifies High School HVAC system to Control Mold

Performed moisture evaluation of high school with re-occurring mold growth.  BDL identified excessive infiltration, poorly insulated pipes and VAV deficiencies and was retained to design replacement systems.  As Project Engineer, BDL verified the installation of new central plant and distribution equipment and controls.  The school now provides a healthy and comfortable learning environment.

BDL Facilitates Construction of Sports Arena


Monitored moisture conditions throughout construction of sports arena for the General Contractor.  Evaluated and supervised the mitigation of water infiltration and condensation issues, preventing the formation of mold growth.  At completion, BDL verified the arena was free of mold growth and ongoing moisture sources.




Other BDL Projects include:

·    Blair House: Recommendations for HVAC operation and moisture control issues

·    U. S. Justice Department: Restoration of NYC facilities impacted by 9/11

·    NIST Boulder Campus: Audit of building environmental conditions

·    GSA Research Study: Enhanced facilities management to improve IAQ in office buildings

·    Hospital with widespread mold growth: Resolved moisture and exposure issues.

·    Middle school with extensive smoke damage: Managed restoration and cleared for re-occupancy.