CHAPPELLE MECHANICAL SERVICES LLC

Chappelle Mechanical Services LLC specializes in mission-critical plumbing, heating, ventilation, and air conditioning (HVAC) systems maintenance and repair for federal facilities. The contractor delivers precise mechanical interventions including boiler plant outage support, chilled and hot water coil replacements, expansion vessel and air separator repairs, pump and valve substitutions, and welding of high-pressure piping systems. Their technical expertise extends to ABSL-3 biosafety suite HVAC verification and repair, demonstrating proficiency in controlled-environment systems requiring stringent environmental controls and regulatory compliance. They routinely address complex infrastructure failures in aging federal buildings, ensuring uninterrupted operation of research, laboratory, and clinical environments through rapid-response mechanical services. The company maintains a consistent and deep relationship with the Department of Health and Human Services, providing ongoing mechanical infrastructure support across multiple campus facilities. Work includes routine maintenance, emergency repairs, and preventive interventions tied to annual facility verifications and research continuity requirements, indicating a trusted, long-term operational partnership within HHS-managed biomedical and public health sites. Chappelle Mechanical Services LLC operates primarily under NAICS 238220, focusing on specialized HVAC and plumbing services for institutional and federal buildings. Their market positioning centers on high-reliability mechanical systems support in sensitive environments, distinguishing them through responsiveness to critical facility needs rather than new construction. They are not certified under any federal small business or socioeconomic programs, and their geographic footprint is anchored in Lorton, Virginia, serving federal installations in the National Capital Region with a focused, technically precise service model.