103+ Years in Business — Family-Owned Mechanical Contractor
Mechanical systems for institutions where failure is not an option.
Selected Work
Power Generation
Life Sciences
Healthcare
Education
Government
Power Generation
Plumbing systems across regional generating stations
duration
sqft
systems
“We take every project personally. Our name is on the building.”
Life Sciences
GMP piping, cleanroom HVAC, controls
GMP-compliant process piping and environmental controls for advanced pharmaceutical manufacturing — built with zero deviation tolerance.
duration
sqft
systems
“We take every project personally. Our name is on the building.”
Healthcare
Cleanroom mechanical, lab HVAC, exhaust
Cleanroom mechanical systems engineered for the strictest regulatory and operational requirements in pharmaceutical research.
duration
sqft
systems
“We take every project personally. Our name is on the building.”
Education
Chiller plant, distribution, BAS
Central plant systems delivering reliable climate control across a historic campus — balancing heritage architecture with modern performance.
duration
sqft
systems
“We take every project personally. Our name is on the building.”
Government
Federal energy retrofit, boiler replacement, design-build
A design-build energy retrofit inside the 2.5M SF Harry S. Truman Building — nine condensing boilers, 15,000 feet of pipe, and a single-day 600-ton crane lift one block from the National Mall.
duration
sqft
systems
“We take every project personally. Our name is on the building.”
Proven Under Pressure
Healthcare
Full mechanical renovation inside an active pediatric hospital. Operating rooms running. Patients in beds. Medical helicopters landing on the roof. Every system stayed live — every hour, every day — while Heffron’s crews worked around them.
Higher Education
When extreme winter weather ruptured aging pipes beneath campus, floodwater threatened a historic cemetery and shut down dormitories mid-semester. Heffron’s crew mobilized immediately — working four consecutive days without sleep, then staying two full weeks to engineer and install a permanent solution that preserved the grounds, restored student housing, and protected irreplaceable heritage.
Life Sciences
Capabilities
From preconstruction through ongoing maintenance, Heffron delivers complete mechanical solutions for the most demanding environments.
Full-scope mechanical construction — from preconstruction through commissioning — for new builds, renovations, and mission-critical expansions.
Preventive maintenance, diagnostics, emergency repairs, and equipment overhauls to protect your investment and maintain uptime.
In-house prefabrication and process piping — tighter tolerances, accelerated schedules, and reduced field labor.
Deep sector expertise in healthcare, life sciences, government, education, and mission-critical facility environments.
Fabrication
Our fabrication shop delivers tighter tolerances and faster schedules. Mechanical prefabrication and process piping assemblies are built under controlled conditions, then installed with surgical precision.
Faster delivery
Controlled conditions
Reduced field labor
Always Available
When critical systems fail, Heffron responds. Our service team is available around the clock throughout the DC Metro area.
Est. 1922 · Washington, D.C.
A century of mechanical excellence, built one project — and one generation — at a time.
