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Pressure Tested Before & After  ·  Mastic Sealant  ·  Every Leak Point Found  ·  Guaranteed
Duct Sealing · Rancho Mission Viejo, CA

Duct Sealing in Rancho Mission Viejo, CA —
Call Now for Same-Day Scheduling.

Pressure testing before sealing quantifies total leakage. Every leak point located and sealed with correct materials. Post-sealing pressure test documents the improvement. Every service guaranteed.

Pressure Tested Before & After
Mastic Sealant
Every Leak Point Found
Guaranteed
Professional Duct Sealing

Professional Duct Sealing in Rancho Mission Viejo, CA

Your energy bills are higher than they should be for the amount of heating and cooling your home requires in Rancho Mission Viejo. Certain rooms will not reach the right temperature regardless of how long the HVAC runs in Rancho Mission Viejo, CA. You have had the equipment checked and it is working correctly in Rancho Mission Viejo. If the equipment is fine but the home is not comfortable and the bills are high, the problem is almost certainly in the distribution system in Rancho Mission Viejo, CA. Specifically, in duct leaks that are allowing conditioned air to escape into unconditioned attic or crawl space before it reaches the rooms you are paying to heat and cool in Rancho Mission Viejo.

Duct leakage happens at every unsealed joint between duct sections, at every branch takeoff from the trunk line, at every register boot connection in the walls and ceilings, and at the connections where the duct system meets the air handler in Rancho Mission Viejo, CA. The Department of Energy estimates that typical residential duct systems lose 20 to 30 percent of conditioned air through leakage in Rancho Mission Viejo. For a home spending $200 per month on heating and cooling, that is $40 to $60 per month escaping through duct leaks to the attic or crawl space in Rancho Mission Viejo, CA.

MBM Air Duct Cleaning finds and seals duct leaks throughout Rancho Mission Viejo, CA in Rancho Mission Viejo. Pressure testing before sealing to quantify the total leakage in Rancho Mission Viejo, CA. Systematic identification of every specific leak point through the accessible system in Rancho Mission Viejo. Correct sealant materials applied to every leak point in Rancho Mission Viejo, CA. Post-sealing pressure testing to document the improvement with measured numbers in Rancho Mission Viejo. And a guarantee on every sealing service in Rancho Mission Viejo, CA. Call now for same-day scheduling in Rancho Mission Viejo.

Why Correct Sealant Materials Last While Duct Tape Fails in Rancho Mission Viejo, CA

Standard duct tape uses a rubber-based adhesive that performs at room temperature but dries and loses adhesion when repeatedly exposed to the temperature extremes that duct systems experience during HVAC operation in Rancho Mission Viejo. A supply duct carrying cold conditioned air through a 130-degree summer attic cycles through extreme temperatures with every cooling cycle in Rancho Mission Viejo, CA. Standard duct tape adhesive is not formulated for this cycling and fails within a few seasons in Rancho Mission Viejo. Mastic sealant remains flexible after curing and maintains its seal through years of thermal cycling in Rancho Mission Viejo, CA. UL 181-rated foil tape maintains adhesion for 20 years or more in normal duct system conditions in Rancho Mission Viejo.

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Where Leaks Occur

Where Duct Leaks Occur and Why They Develop in Rancho Mission Viejo, CA

At Every Unsealed Duct Joint Throughout the System in Rancho Mission Viejo

Every connection between duct sections is a potential leak point in Rancho Mission Viejo, CA. In most residential installations, these joints were mechanically fastened without sealant during installation in Rancho Mission Viejo. Over years of thermal cycling that expands and contracts the ductwork with every HVAC cycle, even joints that were initially sealed with standard duct tape have failed as the tape dried and lost adhesion in Rancho Mission Viejo, CA.

At Branch Takeoffs From the Main Trunk Line in Rancho Mission Viejo, CA

Branch takeoffs split conditioned air from the main trunk line into the individual branch runs serving each room in Rancho Mission Viejo. They have multiple edges and angles that create significant potential leak area if not correctly sealed in Rancho Mission Viejo, CA. Branch takeoff leaks are among the largest individual leak points in typical residential duct systems in Rancho Mission Viejo.

At Register Boot Connections in Walls and Ceilings in Rancho Mission Viejo

The register boot connects the branch duct run to the wall, ceiling, or floor opening where the supply register mounts in Rancho Mission Viejo, CA. The connection between the flexible duct and the boot collar and the connection between the boot and the surrounding framing are both common significant leak points in Rancho Mission Viejo. Conditioned air escaping at the boot level leaks into the wall or ceiling cavity rather than through the register into the room in Rancho Mission Viejo, CA.

Why Original Installation Sealant Fails Over Time in Rancho Mission Viejo, CA

Systems sealed with standard duct tape develop leakage as the tape dries, cracks, and loses adhesion from temperature cycling in Rancho Mission Viejo. Standard duct tape on duct joints typically fails within three to five seasons of thermal cycling in Rancho Mission Viejo, CA. Joints that were sealed with standard tape appear sealed when first applied and are open to leakage again within a few years in Rancho Mission Viejo.

What Leakage Costs You

What Duct Leakage Costs You in Rancho Mission Viejo, CA

20–30%
DOE: Conditioned Air Lost
$40–$60
Per Month Wasted at $200/mo
$600+
Annual Waste at $200/mo Budget

How Leaking Ducts Create Comfort Problems Room by Room in Rancho Mission Viejo, CA

Supply duct leakage between the trunk line and the registers means rooms furthest from the air handler receive less conditioned air than they were designed to receive in Rancho Mission Viejo. The conditioned air that leaks out before reaching the register does not reach the room in Rancho Mission Viejo, CA. Rooms at the end of long duct runs with multiple leak points along the way receive the cumulative effect of all those leaks in Rancho Mission Viejo. The room that is always too hot in summer and too cold in winter is often at the end of a duct run with multiple unsealed joints in Rancho Mission Viejo, CA.

What Return Duct Leaks Do to Your Indoor Air Quality in Rancho Mission Viejo, CA

Return duct leaks draw air from the surrounding unconditioned space into the return airstream in Rancho Mission Viejo. A return duct leak in an attic draws hot, dusty attic air into the air handler in summer in Rancho Mission Viejo, CA. A return duct leak in a crawl space draws crawl space air including moisture, mold spores, and soil particulate into the system in Rancho Mission Viejo. This unconditioned air bypasses the filter and is distributed throughout the home in Rancho Mission Viejo, CA.

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Our Sealing Process

MBM's Duct Sealing Process in Rancho Mission Viejo, CA

1

Pressure Testing to Establish Total Leakage in Rancho Mission Viejo

MBM Air Duct Cleaning performs a duct pressure test before any sealing begins in Rancho Mission Viejo, CA. A calibrated fan is connected to the duct system and pressurized to a standard test pressure in Rancho Mission Viejo. The measured airflow represents the total leakage rate and provides the baseline for comparing with the post-sealing result in Rancho Mission Viejo, CA.

2

Systematic Leak Location Through the Accessible System in Rancho Mission Viejo, CA

With the system pressurized, MBM technicians work through the accessible duct system to locate every specific leak point in Rancho Mission Viejo. Every branch takeoff. Every duct joint. Every register boot connection. Every plenum seam and air handler connection in Rancho Mission Viejo, CA. Every identified leak point is marked for sealing in Rancho Mission Viejo.

3

Correct Sealant Selected for Each Leak Point in Rancho Mission Viejo

Mastic sealant for most duct joint and connection applications in Rancho Mission Viejo, CA. UL 181-rated foil tape for specific sheet metal seam applications in Rancho Mission Viejo. The correct material for the specific application in Rancho Mission Viejo, CA.

4

Every Leak Point Sealed Completely in Rancho Mission Viejo, CA

MBM systematically seals every identified leak point in the accessible duct system in Rancho Mission Viejo. Mastic applied at the correct thickness to cover the full joint gap and bond to the duct surfaces on both sides in Rancho Mission Viejo, CA. Every identified leak point addressed before the post-sealing pressure test in Rancho Mission Viejo.

5

Post-Sealing Pressure Test to Confirm the Result in Rancho Mission Viejo

After all identified leak points are sealed, MBM repeats the pressure test to measure the post-sealing leakage rate in Rancho Mission Viejo, CA. The before and after measurements quantify the leakage reduction achieved by the sealing in Rancho Mission Viejo. Documented evidence of the result provided to the homeowner in Rancho Mission Viejo, CA.

Sealant Materials

What MBM Uses to Seal Duct Leaks in Rancho Mission Viejo, CA

Mastic Sealant — The Professional Standard in Rancho Mission Viejo

Mastic is a water-based sealant specifically formulated for duct system applications in Rancho Mission Viejo, CA. It remains flexible after curing, maintaining its seal through the thermal cycling that duct systems experience in Rancho Mission Viejo. It does not dry out, crack, or lose adhesion from temperature cycling the way standard duct tape does in Rancho Mission Viejo, CA.

UL 181-Rated Foil Tape for Specific Applications in Rancho Mission Viejo, CA

UL 181-rated foil tape is tested and rated specifically for HVAC duct applications in Rancho Mission Viejo. Unlike standard duct tape, it maintains its adhesion through the temperature cycling of duct system operation in Rancho Mission Viejo, CA. Appropriate for specific sheet metal seam applications in Rancho Mission Viejo.

Standard Duct Tape Is Never Used in Rancho Mission Viejo

Standard silver duct tape is not rated for duct system applications in Rancho Mission Viejo, CA. Its rubber-based adhesive dries and loses adhesion from temperature cycling in Rancho Mission Viejo. MBM Air Duct Cleaning never uses standard duct tape for duct sealing work in Rancho Mission Viejo, CA.

Why MBM

Why Choose MBM Air Duct Cleaning for Duct Sealing in Rancho Mission Viejo, CA

Pressure Tested Before and After — Documented Improvement in Rancho Mission Viejo

MBM performs pressure testing before and after every duct sealing service in Rancho Mission Viejo, CA. The before and after measurements document the leakage reduction achieved in Rancho Mission Viejo. Documented improvement, not assumed improvement in Rancho Mission Viejo, CA.

Every Accessible Leak Point Sealed in Rancho Mission Viejo, CA

MBM seals every identified leak point in the accessible duct system in Rancho Mission Viejo. Not a representative sample. Not the most obvious points only in Rancho Mission Viejo, CA. Every identified leak point in Rancho Mission Viejo.

Correct Materials That Maintain Effectiveness Long Term in Rancho Mission Viejo

Mastic sealant and UL 181-rated foil tape that maintain their effectiveness through the thermal cycling of long-term HVAC operation in Rancho Mission Viejo, CA. Never standard duct tape in Rancho Mission Viejo.

Every Sealing Service Guaranteed in Rancho Mission Viejo, CA

Every MBM Air Duct Cleaning duct sealing service is guaranteed in Rancho Mission Viejo. If the sealing does not produce the expected improvement within the guarantee period, we return and address it at no additional charge in Rancho Mission Viejo, CA.

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Pricing

Duct Sealing Cost in Rancho Mission Viejo, CA

All pricing confirmed upfront before work begins in Rancho Mission Viejo. No surprises in Rancho Mission Viejo, CA.

Small system — up to 10 vents in Rancho Mission Viejo$300 to $600
Standard residential system — 10 to 20 vents in Rancho Mission Viejo, CA$500 to $1,000
Large residential system — 20 or more vents in Rancho Mission Viejo$800 to $1,500+
Aeroseal treatment for inaccessible leaks in Rancho Mission Viejo, CA$1,500 to $3,000+

A sealing service that reduces leakage by 15 to 20 percentage points returns that proportional energy cost reduction on every subsequent energy bill in Rancho Mission Viejo, CA. For a home spending $200 per month on heating and cooling, a 15 percent leakage reduction saves approximately $30 per month in Rancho Mission Viejo. A sealing service costing $500 to $1,000 pays for itself in energy savings within 18 to 36 months in most cases in Rancho Mission Viejo, CA. Every month after payback is net return on the investment in Rancho Mission Viejo.

Pressure tested before and after. Every leak found. Correct materials. Guaranteed. MBM Air Duct Cleaning in Rancho Mission Viejo, CA.

Call now for same-day scheduling in Rancho Mission Viejo.

Call Now — (888) 216-9551
Service Area

Serving Rancho Mission Viejo, CA and Surrounding Areas

Downtown Rancho Mission Viejo

Homes, condos, apartments in Rancho Mission Viejo, CA

North Rancho Mission Viejo

Full north-side coverage in Rancho Mission Viejo, CA

South Rancho Mission Viejo

All south-side communities in Rancho Mission Viejo

East Rancho Mission Viejo

East-end homes and properties in Rancho Mission Viejo, CA

West Rancho Mission Viejo

Full west-side coverage in Rancho Mission Viejo

Surrounding Areas

Call to confirm availability in Rancho Mission Viejo, CA

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FAQ

Duct Sealing FAQs in Rancho Mission Viejo, CA

The clearest indicators in Rancho Mission Viejo are energy bills that seem high relative to your usage, rooms that consistently will not reach the right temperature, an HVAC system that runs continuously without achieving comfort setpoint, higher than expected dust levels throughout the home, and humidity problems during cooling season in Rancho Mission Viejo, CA. Pressure testing is the definitive way to quantify the leakage in your specific system in Rancho Mission Viejo.
A duct pressure test connects a calibrated fan to the duct system and pressurizes it to a standard test pressure in Rancho Mission Viejo. The airflow required to maintain that pressure is measured in Rancho Mission Viejo, CA. The measured airflow represents the total leakage rate of the system in Rancho Mission Viejo. MBM Air Duct Cleaning performs pressure testing before and after every duct sealing service in Rancho Mission Viejo, CA.
The Department of Energy estimates that typical residential duct systems lose 20 to 30 percent of conditioned air through leakage before it reaches the living spaces in Rancho Mission Viejo. In systems with particularly poor sealing or failed original sealant, the loss can exceed 30 percent in Rancho Mission Viejo, CA.
Duct cleaning before duct sealing allows the mastic sealant to bond to clean duct surfaces in Rancho Mission Viejo. Applying mastic to duct surfaces coated with accumulated dust and debris reduces the bond quality and long-term sealing effectiveness in Rancho Mission Viejo, CA. MBM Air Duct Cleaning recommends cleaning before sealing when both services are needed and can coordinate both in a single visit in Rancho Mission Viejo.
Mastic is a water-based sealant specifically formulated for duct system applications in Rancho Mission Viejo. It remains flexible after curing and maintains its seal through the thermal cycling that duct systems experience during operation in Rancho Mission Viejo, CA. Standard duct tape uses a rubber-based adhesive that dries and loses adhesion from temperature cycling, failing within a few seasons in Rancho Mission Viejo.
Yes. Return duct leaks in crawl spaces draw crawl space air including its elevated moisture content into the return airstream in Rancho Mission Viejo. The additional moisture enters the air handler and is distributed throughout the home in Rancho Mission Viejo, CA. Indoor relative humidity rises despite the air conditioner running because the additional crawl space moisture load overwhelms the system's dehumidification capacity in Rancho Mission Viejo.
Aeroseal is a technology that seals duct leaks from inside the pressurized duct system in Rancho Mission Viejo. Aerosolized sealant particles are introduced into the system and travel to leak points where they accumulate and seal the gap in Rancho Mission Viejo, CA. It is needed when significant leakage exists in duct sections in wall cavities or ceiling plenums that cannot be physically accessed for manual sealant application in Rancho Mission Viejo.
Mastic duct sealant maintains its sealing effectiveness for the life of the duct system when correctly applied in Rancho Mission Viejo. UL 181-rated foil tape maintains adhesion for 20 years or more in normal duct system conditions in Rancho Mission Viejo, CA. Both materials significantly outlast standard duct tape in duct system applications in Rancho Mission Viejo.
Yes. Sealing the duct system reduces the conditioned air loss the system was experiencing and delivers more of the conditioned air the HVAC produces to the living spaces in Rancho Mission Viejo. The reduction in leakage translates directly to reduced energy consumption for the same heating and cooling output in Rancho Mission Viejo, CA.
Yes for systems with return duct leaks in unconditioned spaces in Rancho Mission Viejo. Return duct leaks in attics and crawl spaces draw unconditioned air including dust, moisture, and mold spores into the return airstream in Rancho Mission Viejo, CA. Sealing these leaks eliminates the pathway and keeps the circulated air to what is drawn from the living spaces in Rancho Mission Viejo.
Duct sealing costs in Rancho Mission Viejo range from $300 to $600 for smaller systems, $500 to $1,000 for standard residential systems, $800 to $1,500 and above for larger systems, and $1,500 to $3,000 and above for systems requiring Aeroseal treatment in Rancho Mission Viejo, CA. All pricing confirmed upfront before work begins in Rancho Mission Viejo.
Yes. Every MBM Air Duct Cleaning duct sealing service is guaranteed in Rancho Mission Viejo. If the sealing does not produce the expected improvement within the guarantee period, we return and address it at no additional charge in Rancho Mission Viejo, CA.
Call Today

Ducts Losing Conditioned Air? Call MBM Air Duct Cleaning in Rancho Mission Viejo, CA Today.

Duct leakage pays for conditioned air that heats and cools your attic and crawl space instead of your living spaces every month in Rancho Mission Viejo. MBM Air Duct Cleaning quantifies the leakage with pressure testing, locates every specific leak point, seals every accessible leak with correct materials, confirms the improvement with post-sealing testing, and guarantees every service in Rancho Mission Viejo, CA. Call now for same-day scheduling in Rancho Mission Viejo.

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Our HVAC & Air Duct Services in Rancho Mission Viejo, CA

Duct SealingHVAC RepairAir Conditioning RepairDryer Vent CleaningFurnace RepairHeat Pump RepairEmergency HVAC RepairCommercial HVAC RepairHVAC InstallationHVAC Replacement

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