HVAC Testing & Balancing Services
Independent, NEBB-certified TAB — air side, water side, envelope, and acoustics — documented in a certified report since 1982.
Every service dL Flow Tech performs is done to NEBB procedure with calibrated instruments on a documented schedule. The deliverable is a certified report — the kind an engineer of record can stamp and an authority can accept. We work independent of the installing mechanical contractor, so the report is genuine third-party verification.
Core Service
Testing, Adjusting & Balancing (TAB)
The engineering discipline that measures an HVAC system's actual airflow and water flow, adjusts every component to the design intent, and certifies the result. NEBB-certified. Independent of the installing contractor.
Full TAB overviewHVAC System Surveys
Systematic field investigation of existing HVAC systems — troubleshooting comfort issues, informing design reviews, and documenting what the building actually delivers.
Learn moreJoint Commission Ventilation Testing
Annual ventilation testing for healthcare facilities — air changes, pressure relationships, and humidity documented to meet Joint Commission and ASHRAE 170 requirements.
Learn moreLEED & Energy Code Compliance
Enhanced commissioning authority for LEED projects and energy code sign-off — documented for GBCI and the AHJ.
Learn moreVentilation Verification & IAQ
Outdoor-air rates, room pressurization, and air change rates measured and documented to ASHRAE 62.1 and 170.
Learn moreFume Hood Testing
Face velocity and containment performance measured to ASHRAE 110 and SEFA standards. Annual testing cycles.
Learn moreFire & Smoke Damper Inspection
NFPA 80 and NFPA 105 fire and smoke damper inspection — documented, deficiency-reported, code-ready.
Learn moreCleanroom Airflow Testing & Balancing
ISO 14644 cleanroom airflow testing — air changes, pressurization, particle counts, and HEPA integrity documented.
Learn moreHomeowners & Builders
Residential Testing Services
Blower door and duct leakage testing for energy code compliance, HERS ratings, BPI audits, and utility programs. NEBB-certified. BPI-certified.
Need a TAB Proposal?
Send your mechanical drawings and we'll return a fixed-scope proposal. Call (845) 265-2828 or use the contact form.
Request a Quote