For Duct Sealing in KC

Web Design for Duct Sealing Companies in Kansas City

Duct sealing customers are KC homeowners who have rooms that never reach setpoint despite a new HVAC system, homeowners with high utility bills and an otherwise efficient system, or homeowners who were told by a home energy auditor that their duct system is losing conditioned air to the attic or crawl space. The central education is what duct leakage to unconditioned space means and why it's different from leakage between rooms. Duct leakage to outside (Qn,out): conditioned air escaping from supply ducts into the attic, crawl space, or garage — this air is lost entirely from the living space; typical existing homes lose 15–30% of system airflow this way; DOE studies show duct leakage is responsible for 25–40% of heating and cooling energy waste in homes with ducts in unconditioned space. Duct blaster test: a calibrated fan seals to the duct system (registers taped) and pressurizes to 25 Pascals — result expressed in CFM25 (cubic feet per minute at 25 Pascals); leakage to outside is measured by comparing total leakage with house pressurized and unpressurized; Energy Star new construction target is 4 CFM25 per 100 sq ft of floor area; existing KC homes commonly test at 15–30 CFM25 per 100 sq ft. Manual sealing methods: mastic sealant (water-based, fiberglass mesh for gaps over 1/4 inch, paintbrush applied, remains flexible) is the preferred method at accessible joints and connections; UL 181-rated foil tape is code-compliant for metal ducts but requires clean surfaces and may peel under thermal cycling; duct tape (cloth) is not code-compliant for HVAC ducts and fails within 5–10 years. Aeroseal duct sealing: pressurizes the duct system with a mist of acrylate polymer particles (similar to Elmer's Glue) — particles travel to leakage sites and accumulate at edges, sealing gaps from the inside out; effective on leaks up to approximately 5/8-inch diameter; computer-controlled process measures and documents leakage before and after; typical results: reduce duct leakage by 90% in 4–6 hours without accessing inaccessible ducts in finished walls and ceilings. Duct insulation: leakage sealing addresses airflow loss but not conduction loss through duct walls — ducts in attics should be insulated to R-8 (KC code), existing flex duct at R-4 to R-6 should be replaced or supplemented; thermal bridging at metal duct connections in unconditioned space reduces effective insulation by 25–50%. A duct sealing website that explains what leakage to outside means in dollars, how duct blaster testing quantifies the problem before and after, and what Aeroseal does that manual sealing cannot earns the homeowner who knows something is wrong but has been told the equipment is fine.