Your energy bills are higher than they should be for the amount of heating and cooling your home requires in South Portland. Certain rooms will not reach the right temperature regardless of how long the HVAC runs in South Portland, ME. Maybe you have even been told your HVAC system is undersized and needs to be replaced in South Portland. Before you spend money on a larger system, consider what happens when a correctly sized system is running against a duct network that is losing 20 to 30 percent of its conditioned air through unsealed joints and connections in South Portland, ME. The system appears undersized because it is losing a significant portion of what it produces before that conditioned air reaches the rooms in South Portland. A new system with the same leaky ducts loses the same percentage and produces the same disappointing results in South Portland, ME.
Duct leakage is the loss of conditioned air through gaps, holes, and unsealed joints in the duct system in South Portland. It happens at every unsealed duct joint, at every connection between duct sections, at branch takeoffs and splitter boxes, and at the connections where duct registers meet the boot at the ceiling or floor in South Portland, ME. In most residential duct systems, these joints were installed with mechanical connections and no sealant, or with standard duct tape that dries, cracks, and loses adhesion within a few seasons of thermal cycling in South Portland. The Department of Energy estimates that typical residential duct systems lose 20 to 30 percent of conditioned air through leakage in South Portland, ME. For a home spending $200 per month on heating and cooling, that is $40 to $60 per month delivered to the attic or crawl space rather than to the living spaces in South Portland.
ISA Air Duct seals duct systems throughout South Portland, ME in South Portland. Pressure testing before sealing to quantify the leakage. Systematic identification of every leak point in South Portland, ME. Correct sealant materials for every joint type in South Portland. Pressure testing after sealing to confirm the improvement with measured results in South Portland, ME. We pick up. We show up. We seal it correctly in South Portland.
Duct sealing is the application of correct sealant materials to every unsealed joint, connection, and seam in the duct system to eliminate conditioned air loss in South Portland. It is a different service from ductwork repair in South Portland, ME. Ductwork repair addresses physical structural damage to the duct system. Duct sealing addresses air leakage through the joints and connections of a structurally sound duct system in South Portland. A duct system can be structurally intact with no disconnections, no torn flexible duct, and no collapsed sections, and still lose 20 to 30 percent of conditioned air through unsealed joints in South Portland, ME. That is the problem duct sealing addresses in South Portland.
Duct sealing is the process of identifying and sealing every air leakage point in the duct system in South Portland. It addresses the conditioned air loss that occurs through gaps and unsealed connections throughout the duct network in South Portland, ME. The result is a duct system that delivers more of the conditioned air the HVAC produces to the rooms it is intended to reach, reducing energy consumption, improving comfort, and in the case of return duct leakage, improving indoor air quality in South Portland.
Ductwork repair addresses physical structural faults including disconnected sections, torn flexible duct, and collapsed runs in South Portland. Duct sealing addresses air leakage through the joints and connections of a structurally sound system in South Portland, ME. A system may need repair for structural faults, sealing for joint leakage, or both in South Portland. ISA Air Duct assesses the specific condition of the system and recommends the correct service for what is actually found in South Portland, ME.
ISA Air Duct's duct sealing service covers pre-sealing pressure testing to quantify the leakage, systematic identification of every leak point through the accessible duct system, application of correct sealant materials to every identified leak point, and post-sealing pressure testing to confirm and quantify the improvement in South Portland, ME. Complete sealing of every accessible joint and connection in the system in South Portland.
Every point where two duct sections connect is a potential leakage point in South Portland, ME. In sheet metal duct systems, the longitudinal seams in individual duct sections and the transverse joints where sections connect are leakage sources if not sealed with mastic or appropriate tape in South Portland. In most residential installations, these joints were mechanically connected without sealant in South Portland, ME. The gaps at the joint edges allow conditioned air to escape into the surrounding space with every HVAC cycle in South Portland.
Branch takeoffs are the fittings that split conditioned air from the main trunk line to the individual branch duct runs in South Portland. They are connection points with multiple edges and angles that are particularly prone to leakage if not correctly sealed in South Portland, ME. Splitter boxes in zoned systems have multiple connection points that represent significant potential leakage area in South Portland. ISA Air Duct pays specific attention to branch takeoffs and splitter boxes during leak identification because they represent some of the largest individual leakage points in typical residential systems in South Portland, ME.
The register boot is the fitting that connects the branch duct run to the floor, ceiling, or wall opening where the register grille mounts in South Portland, ME. The connection between the flexible duct and the boot collar and the connection between the boot and the surrounding framing are both common leakage points in South Portland. Conditioned air escaping at the boot level leaks into the wall or floor cavity rather than through the register into the room in South Portland, ME.
Flexible duct connects to sheet metal fittings, boot collars, and plenum connections using a mechanical connection where the flexible duct liner and outer jacket are secured to the fitting with zip ties or straps in South Portland. Without mastic sealant applied to the connection before securing, the connection leaks at the gaps between the duct liner and the fitting surface in South Portland, ME. Mastic sealing of flexible duct collar connections is a standard component of ISA Air Duct's sealing service in South Portland.
Systems that were initially sealed with standard duct tape develop leakage as the tape dries, cracks, and loses adhesion in South Portland, ME. Standard duct tape is not rated for the temperature cycling that duct systems experience during normal operation in South Portland. Within a few seasons, standard duct tape on duct joints fails and the underlying joint gap opens to leakage again in South Portland, ME. Mastic sealant and UL 181-rated foil tape are the materials that maintain their sealing effectiveness through the thermal cycling of long-term HVAC operation in South Portland.
The Department of Energy estimates that typical residential duct systems lose 20 to 30 percent of conditioned air through leaks, holes, and poorly connected ducts before that air reaches the living spaces in South Portland. This estimate is based on testing of real residential duct systems across a range of ages and construction types in South Portland, ME. In systems with particularly poor initial installation or significant seal failure, the loss can be higher in South Portland.
Supply duct leakage in the spaces between branch duct connections and the registers means the rooms furthest from the air handler receive less conditioned air than they were designed to receive in South Portland. The conditioned air that leaks out of the supply duct before reaching the register is air that does not reach the room in South Portland, ME. Rooms at the end of long duct runs with multiple leak points along the way receive the cumulative effect of all those leaks in South Portland. The room that is always too hot in summer and too cold in winter is often a room at the end of a leaky supply run in South Portland, ME.
Return duct leakage draws air from the surrounding space into the return airstream in South Portland, ME. In an attic, that means drawing hot, dusty attic air into the air handler in summer in South Portland. In a crawl space, that means drawing crawl space air including moisture, mold spores, and whatever else is in the crawl space environment into the system and distributing it throughout the home in South Portland, ME. Return duct sealing eliminates this pathway and keeps the circulated air to what is drawn from the living spaces in South Portland.
An HVAC system compensating for duct leakage losses runs longer cycles, works against the pressure imbalance that leakage creates in the duct system, and conditions more total air volume than the living space requires in South Portland. The cumulative effect is accelerated component wear across the blower motor and other system components in South Portland, ME. Sealing the duct system reduces the load the HVAC operates under and extends the equipment service life in South Portland.
ISA Air Duct performs duct system pressure testing before sealing to quantify the total leakage in the system in South Portland, ME. A calibrated fan is connected to the duct system and the system is pressurized to a standard test pressure in South Portland. The airflow required to maintain that pressure is measured in South Portland, ME. The measured airflow represents the total leakage rate of the system and provides the baseline for comparing before and after sealing performance in South Portland.
With the system pressurized, ISA Air Duct technicians systematically locate every specific leak point in the accessible duct system in South Portland. A pressurized leaking duct system produces audible air movement and detectable airflow at leak points that can be located systematically in South Portland, ME. Every identified leak point is marked for sealing in South Portland.
ISA Air Duct selects the correct sealant for each specific leak point based on the duct type, the joint configuration, and the access conditions in South Portland, ME. Mastic duct sealant for most duct joints and connections in South Portland. UL 181-rated foil tape for specific sheet metal seam applications in South Portland, ME. The correct material for the specific application in South Portland.
ISA Air Duct systematically seals every identified leak point in the accessible duct system in South Portland. Mastic applied at the correct thickness to cover the full joint gap and bond to the duct surfaces on both sides in South Portland, ME. UL 181-rated tape applied with adequate overlap and firm pressure for full adhesion in South Portland. Every leak point addressed before the post-sealing test in South Portland, ME.
After sealing is complete, ISA Air Duct repeats the pressure test to measure the post-sealing leakage rate in South Portland, ME. The before and after measurements quantify the leakage reduction achieved by the sealing in South Portland. The post-sealing test confirms the sealing produced meaningful improvement and provides documented evidence of the result in South Portland, ME.
Mastic is a water-based sealant specifically formulated for duct system applications in South Portland, ME. It remains flexible after curing, which means it maintains its seal through the expansion and contraction that duct systems experience during thermal cycling in South Portland. It bonds well to sheet metal, flexible duct liners, and fibrous duct board in South Portland, ME. It does not dry out, crack, or lose adhesion from temperature cycling the way standard duct tape does in South Portland. Mastic is the correct sealant for most duct joint applications and the material ISA Air Duct uses on the majority of duct sealing work in South Portland, ME.
UL 181-rated foil tape is a pressure-sensitive tape specifically tested and rated for HVAC duct applications in South Portland. Unlike standard duct tape, UL 181 foil tape maintains its adhesion through the temperature cycling of duct system operation in South Portland, ME. It is appropriate for specific sheet metal seam applications where a clean, smooth seal is needed in South Portland. ISA Air Duct uses UL 181-rated foil tape where its specific properties make it the correct choice for the application in South Portland, ME.
Standard silver duct tape is not rated for duct system applications in South Portland, ME. Its rubber-based adhesive dries and loses adhesion from the temperature cycling that duct systems experience during normal operation in South Portland. Standard duct tape on duct joints fails within a few heating and cooling seasons in South Portland, ME. Joints sealed with standard duct tape appear sealed when the tape is first applied and are open to leakage again within a few years in South Portland. ISA Air Duct never uses standard duct tape for duct sealing work in South Portland, ME.
Aeroseal is a duct sealing technology that seals leaks from the inside of the duct system in South Portland. Aerosolized sealant particles are introduced into the pressurized duct system and travel with the airstream to leak points where they accumulate and seal the gap in South Portland, ME. Aeroseal is particularly effective for sealing leaks in inaccessible duct sections that cannot be reached for manual sealant application in South Portland. ISA Air Duct provides information on Aeroseal duct sealing for systems where inaccessible duct sections represent significant leakage that manual sealing cannot address in South Portland, ME.
ISA Air Duct performs pressure testing before and after every duct sealing service in South Portland, ME. The before and after measurements document the leakage reduction achieved by the sealing in South Portland. Verified improvement, not assumed improvement in South Portland, ME.
Mastic for most duct joint applications in South Portland. UL 181-rated foil tape for specific sheet metal seam applications in South Portland, ME. Never standard duct tape in South Portland. The correct material for every specific application in South Portland, ME.
ISA Air Duct seals every identified leak point in the accessible duct system in South Portland, ME. Not a representative sample. Not the most obvious points only in South Portland. Every identified leak point in South Portland, ME.
Every ISA Air Duct technician performing duct sealing in South Portland is licensed and insured in South Portland, ME.
Every ISA Air Duct duct sealing service is guaranteed in South Portland, ME. If the sealing does not produce the expected improvement within the guarantee period, we return and address it at no additional charge in South Portland.
All pricing confirmed upfront before work begins in South Portland. No surprise charges in South Portland, ME.
A duct sealing service that reduces leakage by 15 to 20 percentage points on a system that was losing 25 percent of conditioned air returns that proportional energy cost reduction on every subsequent energy bill in South Portland, ME. For a home spending $200 per month on heating and cooling, a 15 percent reduction in duct leakage saves approximately $30 per month in South Portland. A sealing service that costs $500 to $1,000 pays for itself in energy savings within 18 to 36 months in most cases in South Portland, ME. Every month after payback, the savings are net return on the sealing investment in South Portland.
We pick up. We show up. We seal it correctly in South Portland.
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Duct leakage is paying for conditioned air that heats and cools your attic and crawl space instead of your living spaces in South Portland. ISA Air Duct quantifies the leakage with pressure testing, seals every accessible leak point with correct materials, confirms the improvement with post-sealing testing, and guarantees every service in South Portland, ME. We pick up. We show up. We seal it correctly in South Portland. Call now in South Portland, ME.
Call Now — (888) 216-9551