Residential Testing Services
Independent blower door and duct leakage testing for homeowners, builders, and energy code compliance — certified and documented.
dL Flow Tech has been performing residential energy testing across the Hudson Valley since 1982. We test new construction for code compliance, existing homes for energy program qualification, and individual homes where the owner wants to know where their heat and cooling is going. NEBB-certified. BPI-certified. Independent.
Blower Door Testing
Whole-house air leakage testing that measures how tight your home is — required for energy code compliance, HERS ratings, BPI audits, and utility rebate programs. We test in a single visit and hand you the report the program needs.
- Energy code compliance (IECC / ECCC)
- HERS / RESNET ratings
- BPI energy audit qualification
- Utility incentive programs
- New construction & existing homes
Residential Duct Leakage Testing
Duct blaster testing that measures how much conditioned air your duct system is losing to unconditioned spaces — attics, crawlspaces, and garages. Required for energy code compliance and HERS ratings on homes with ducted HVAC systems.
- Duct leakage to outside (Qn,out)
- Total duct leakage (Qn,total)
- IECC / ECCC compliance
- HERS / RESNET documentation
- Combined blower door + duct test
Why homeowners and builders choose dL Flow Tech
Independent, certified testing
NEBB-certified and BPI-certified technicians using calibrated RetroTec equipment. The report your program needs, produced correctly the first time.
Energy code compliance expertise
We know the IECC and New York State ECCC requirements for residential air tightness and duct leakage — and how the testing must be documented for permit signoff.
No upsell, no insulation sales
We test. We report. We don't sell insulation, weatherization, or HVAC equipment — so our results are what we measure, not what makes us a second sale.
Ready to schedule testing?
Call us at (845) 265-2828 or use the contact form to request a quote. We serve the Hudson Valley and NYC metro.
Request a Quote