About
About Us
We test ductwork. That's it.
What We Are
Westchester Duct Testing is a residential duct leakage testing service operated by Marcy Engineering, PLLC, a licensed professional engineering firm (PLLC) based in Harrison, NY.
We test residential HVAC ductwork for air leakage per New York State energy code requirements and provide signed test reports to contractors for building department submission. We work exclusively with residential HVAC contractors.
We don't sell HVAC systems. We don't do energy audits. We don't do home inspections. We don't do blower door testing. We test ductwork.
Engineering Oversight
Marcy Engineering, PLLC is led by Jake Stone, PE — a licensed Professional Engineer in New York. PE-backed testing means building departments trust the signed report. A test report from a licensed engineering firm carries weight when you hand it to the building official.
Why We Exist
The 2025 ECCCNYS (effective December 31, 2025) eliminated the conditioned-space exemption for duct testing and made duct leakage testing a near-universal requirement for new duct installations in Westchester County — including HVAC retrofits.
No dedicated duct testing company serves Westchester. Brooklyn-based testers spend two hours driving to Scarsdale for one job. Nobody offers same-day service. Nobody publishes pricing. Nobody hands you a signed report before they leave the job site.
We fix that. Based in Harrison, we can do 4–6 tests per day across Westchester. We show up when we say we will. You get the report before we leave. If it fails, we identify the leaks and schedule the re-test. That's the whole model.
Where We Operate
Westchester County, NY
All 42+ municipalities — based in Harrison
Rockland County, NY
Clarkstown, Orangetown, Ramapo, Haverstraw, Stony Point
Putnam County, NY
Carmel, Putnam Valley, Southeast, Patterson
Fairfield County, CT
Greenwich, Stamford, Darien, New Canaan, Norwalk
For MEP/HVAC consulting engineering services, see marcyengineering.com. Westchester Duct Testing handles duct leakage testing only.
Ready to schedule a test?
Response within 1 hour during business hours · Mon–Fri 7 AM–6 PM · Sat 8 AM–2 PM