From air and water balancing to FGI-compliant healthcare testing, The THB Company delivers the full spectrum of TAB services — TABB and NEMI certified, across all of New England.
The foundation of a properly functioning HVAC system. Our TABB-certified technicians measure, adjust, and document airflow and water flow to ensure every zone in your building performs exactly as designed.
Air balancing involves systematically measuring and adjusting the airflow at every supply, return, and exhaust point throughout your HVAC system. Water (hydronic) balancing applies the same precision to heating and cooling water circuits — ensuring pumps, coils, chillers, and boilers operate at peak efficiency with even distribution across all zones.
Unbalanced systems waste energy, create occupant discomfort, and accelerate mechanical wear. Proper TAB pays for itself — often within a single heating or cooling season.
Protecting building occupants requires more than comfort — it requires verified, code-compliant life safety systems. Our NEMI-certified life safety testing ensures your HVAC infrastructure performs when it matters most.
Life safety testing encompasses the verification and documentation of all HVAC-related systems that directly protect building occupants in emergency conditions. This includes smoke control systems, pressurization systems for stairwells and corridors, and the integration of HVAC controls with fire alarm systems.
Our technicians follow rigorous national standards and provide complete documentation suitable for Authority Having Jurisdiction (AHJ) review, certificate of occupancy requirements, and ongoing compliance records.
Fire dampers are a critical passive fire protection element in any commercial or institutional building. Regular inspection and testing is not optional — it's mandated by NFPA 80 and The Joint Commission for healthcare facilities.
Fire dampers are installed throughout ductwork to prevent the spread of fire and smoke through HVAC systems. Over time, dampers can become stuck, corroded, or obstructed — rendering them inoperable exactly when they're needed. THB performs thorough damper inspections, operational testing, and re-inspection to ensure every damper in your system is functional and code-compliant.
For healthcare facilities, Joint Commission standards require fire and smoke damper testing at defined intervals. Our detailed reports provide the documentation your facility needs for accreditation and compliance.
Duct leakage is one of the most significant sources of energy waste in commercial buildings. Our duct leakage testing accurately quantifies losses, documents compliance, and identifies where remediation is needed.
Even well-constructed duct systems develop leaks over time — at joints, connections, and access panels. In a commercial building, duct leakage can account for 20–30% of total HVAC energy loss. Our pressurized duct leakage testing measures the exact leakage rate of your system and compares it against design specifications and energy code requirements (ASHRAE 90.1, IECC).
We perform both supply and return duct leakage testing, provide full documentation for code compliance, and support LEED and green building certification requirements.
Commissioning is the quality assurance process that verifies every building system is designed, installed, and operating as intended — before occupancy and throughout the building's life. THB provides independent, third-party commissioning for new construction and existing buildings.
A newly constructed building is only as good as its commissioning. Without it, HVAC systems may be installed correctly on paper but underperform in practice — wasting energy, generating comfort complaints, and failing inspections. Our commissioning process systematically verifies every system component from design review through functional performance testing.
We also offer retro-commissioning for existing buildings where systems have drifted from original design intent — a common situation in buildings more than five years old.
Healthcare facilities operate under the most stringent HVAC performance requirements of any building type. The THB Company has deep experience with FGI Guidelines-compliant testing — serving hospitals, surgical centers, and medical research facilities across New England.
The Facility Guidelines Institute (FGI) publishes the Guidelines for Design and Construction of Health Care Facilities — the reference standard for healthcare construction and renovation across the United States. FGI requirements for HVAC include precise air pressure relationships, minimum air change rates, temperature and humidity ranges, and filtration levels that vary by room type and function.
Our team has performed FGI-compliant TAB at major New England healthcare institutions including Boston Children's Hospital and Dana-Farber Cancer Institute. We understand the unique demands of operating rooms, isolation rooms, clean corridors, and laboratory environments — and we deliver the documentation your facility needs.
How We Work
We review design documents, specifications, and scope before mobilizing — so we arrive prepared and efficient.
Our certified technicians use state-of-the-art instruments to measure, test, and document system performance in the field.
We make precise adjustments to bring every component into compliance with design intent and applicable standards.
You receive a comprehensive TAB report — cloud-generated, fully documented, and ready for AHJ, commissioning, or accreditation review.
Get Started
Call us or send a message — we're happy to review your project scope and recommend the right approach.