Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterFast, Reliable Duct Sealing Across Beverly Hills
Duct sealing in Beverly Hills typically runs $1,200 – $3,800 per system depending on accessibility, with most jobs completed in one day and a written price agreed before any work starts. Our crews serve Beverly Hills from our Los Angeles office, and we know the local building department’s inspection standards well enough to document every sealed joint to permit level. Call (361) 326-5060 for a free estimate.
We’ve worked on enough Beverly Hills homes to know the pattern: a 1920s Spanish Colonial south of Santa Monica Boulevard needs a completely different approach than a 2015 hillside estate off Benedict Canyon. The old houses have gravity-fed ductwork with asbestos-wrapped joints and no returns. The new ones hide multi-zone systems behind custom millwork where you can’t reach the plenum without a finish carpenter on standby. Both leak. Both drive up HVAC bills. Both need sealing by crews who understand what they’re looking at, not technicians running a cookie-cutter checklist.
Why Hollis Air Duct Cleaning Is Beverly Hills’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004, and our Beverly Hills customers come back because we treat duct sealing as a documentation job, not just a tape job. Our 365-Day Done Right Promise covers every sealed joint in writing: if a seal fails within a year, we return and make it right at no charge, including a free second visit. That matters in Beverly Hills, where resale inspections can surface problems years later.
Our technicians are background-checked, uniformed, and trained to The Garrison Standard: arrive inside the quoted window, price in writing before touching anything, complete the job by the book, and leave the site clean. Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
We dispatch to Beverly Hills from our Los Angeles office, and we carry the equipment to handle both the flats and the hills: Rotobrush rotary brush systems for mechanical cleaning before sealing, Nikro negative-air machines for containment during source removal, and professional-grade mastic and mesh from Abatement Technologies and Guardsman for seals that hold up to local inspection.
HVAC Duct Sealing in Beverly Hills
HVAC Duct Sealing in Beverly Hills means closing the gaps, cracks, and failed joints in your forced-air system so conditioned air reaches the rooms it’s supposed to reach instead of leaking into attics, crawlspaces, or wall cavities. Most Beverly Hills homes lose 20 – 30% of heated or cooled air through duct leakage, and in a climate with heavy year-round HVAC use, that adds up fast on utility bills. We seal with mastic and reinforced mesh, not duct tape, because tape dries out and peels in Beverly Hills’ warm, dry air within a few years.
A typical HVAC duct sealing job in Beverly Hills runs $1,200 – $2,800 for a single accessible system in a flat or mid-century home. Hillside estates with multiple zones, concealed chases, or custom millwork typically range $2,200 – $3,800 per system. We price per system, not per vent, and we put that price in writing before any work begins.
Pre-Sealing Inspection and Pressure Testing
We start every job with a camera inspection and a duct blaster or pressure pan test to map exactly where your system is leaking. In Beverly Hills, this step is non-negotiable: without a baseline, you can’t prove improvement to a buyer’s inspector or the building department later. We document everything.
Mastic Application to Permit Standards
Our sealing method uses water-based duct mastic with fiberglass mesh reinforcement at joints and seams. In Beverly Hills, we apply to visible standards because your building department may flag sealant appearance on resale or renovation permits. We photograph every sealed joint and label the log by location.
Duct Repair in Beverly Hills
Duct Repair in Beverly Hills addresses the physical damage that sealing alone won’t fix: crushed flex duct, disconnected plenums, corroded metal runs, or asbestos-wrapped joints that have deteriorated beyond safe sealing. In the 1920s – 40s Spanish Colonials south of Santa Monica Boulevard, we regularly find original gravity-furnace ductwork with wall registers, no return air pathways, and decades of attic insulation pulled into the system through gaps that opened as tape failed. These systems need repair before they can be sealed effectively.
Duct repair in Beverly Hills typically costs $800 – $2,400 depending on material access and whether asbestos abatement is required. We do not disturb asbestos-wrapped joints without proper containment and disposal protocol. If your system contains asbestos, we’ll tell you upfront and coordinate with licensed abatement specialists.
Gravity-Furnace Duct Restoration
Original gravity-fed systems in Beverly Hills flats often have no mechanical blower and no return ductwork. We repair these by rebuilding supply plenums, adding return pathways where structurally possible, and transitioning to modern sealed duct where the original metal is too corroded to salvage. Every repair is photographed and mapped for future inspection.
Multi-Zone System Reconnection
Hillside estates frequently have zone dampers and flex-duct branches hidden behind soffits or in chases. We find the disconnections, repair or replace damaged sections, and seal the plenum connections that were left accessible only to the original builder. This is detailed work that requires patience and documentation.
Trusted Brands We Service in Beverly Hills
Our equipment roster includes Rotobrush rotary brush systems for mechanical agitation inside ductwork, Nikro negative-air machines for containment during cleaning and repair, and sealing products from Abatement Technologies and Guardsman that meet commercial-grade standards. We stock common fittings and mastic compounds locally so Beverly Hills jobs don’t wait on parts. For filtration upgrades after sealing, we carry Honeywell, Aprilaire, and Guardsman products sized to your system’s new airflow profile. Every brand we use is chosen for durability in dry climates, because Beverly Hills conditions punish hardware-store-grade materials.
Common Duct Sealing Problems We See in Beverly Hills Homes
- Dried and cracked mastic on original 1920s – 40s Spanish Colonial runs. The dry inland-adjacent air here dries out duct tape and old mastic within three to five years, especially where previous crews applied sealant over dusty, unprimed metal without cleaning first. We remove the failed material, mechanically clean the joint, and reseal with reinforced mastic rated for your conditions.
- Concealed flex-duct leaks in hillside estate chases. Multi-zone systems tucked behind custom millwork often get sealed at the visible register but left leaking at the concealed plenum connection. Homeowners feel no pressure improvement because the fix was cosmetic. We pressure-test before and after to prove the seal holds everywhere, not just where it’s easy to reach.
- Wildfire ash contamination compromising fresh sealant. After major fire seasons, canyon homes pull ash and soot into ductwork. Crews who seal without first doing source removal and negative pressure containment trap that contamination against fresh mastic, preventing proper cure and creating an odor problem. We clean first, contain the work zone, then seal.
- Unpermitted flex-duct penetrations flagged at resale. Because Beverly Hills operates its own building department, visible duct sealant and flex-duct penetrations are scrutinized on resale and renovation permits in ways neighboring cities don’t enforce. We document every sealed joint to inspection-pass standards so your work doesn’t become a closing-day surprise.
Pricing for Duct Sealing in Beverly Hills, CA
Honest pricing for duct sealing in Beverly Hills starts with understanding that this market has two very different housing stocks. In the flats, a single-system home with accessible ductwork typically runs $1,200 – $2,200 to seal. Hillside estates with multiple zones, concealed runs, or custom millwork typically run $2,200 – $3,800 per system. Asbestos-wrapped joints requiring abatement coordination add $800 – $1,500 to the total.
We price per system, not per vent. One flat price per system, agreed in writing before we start. No per-vent upcharges. No surprises when the technician walks through your door. Every estimate includes the camera inspection, pressure testing, sealing labor, materials, and documentation photo log. Call (361) 326-5060 for your free estimate.
We Also Serve Cities Near Beverly Hills
Our Duct Sealing crews work throughout the Westside and Mid-City area, including Beverly Hills and neighboring communities. We regularly serve West Hollywood, Culver City, Santa Monica, and Marina del Rey with the same written pricing, documented standards, and 365-Day Done Right Promise.
Serving Beverly Hills, CA - Our Local Coverage Area
We’re based in the Beverly Hills area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Duct Sealing in Beverly Hills
Beverly Hills operates its own building department, and visible duct sealant and flex-duct penetrations get flagged during resale and renovation permit inspections in ways that neighboring cities like West Hollywood and Culver City simply don’t enforce. We photograph every sealed joint, label the photo log by room and duct location, and format the documentation to permit-inspection standards so your work passes scrutiny when you sell or remodel.
Yes, in most cases, but only after a camera inspection determines whether the asbestos-wrapped joints are intact enough to seal safely. Our tech was called to a 1928 Spanish Colonial on the flats where decades of attic insulation had been pulled into the system through leaking joints. We ran a camera inspection, sealed the accessible supply and return ducts with mastic and mesh, and left the homeowner with a labeled photo log of every sealed joint so the work could stand up to Beverly Hills building department scrutiny at resale. If asbestos is too deteriorated, we coordinate abatement before sealing.
A hillside estate often has three to five separate HVAC systems serving different zones, each with its own duct network, plenum, and accessibility challenges. Per-vent pricing would either undercharge for a concealed system behind custom millwork or overcharge for a straightforward accessible run. Per-system pricing lets us assess each network individually: one might need two hours and basic access, another might need a finish carpenter on standby and a full day. One flat price per system, written down before we start.
No. Sealing over ash-contaminated ducts traps soot against fresh mastic, prevents proper cure, and creates persistent odor. The correct sequence is source removal first: mechanical agitation with a Rotobrush system, negative-air containment with a Nikro machine, then verification with camera inspection, then sealing. We do not seal ducts that haven’t been cleaned and cleared first. Call (361) 326-5060 and we’ll walk you through the proper sequence for your canyon home.
We provide three proofs: a before-and-after pressure test showing measurable leakage reduction, a camera inspection video of key joints, and a labeled photo log of every sealed connection with room location noted. In Beverly Hills, where building department scrutiny is a real factor at resale, this documentation protects your investment. The 365-Day Done Right Promise covers any seal failure within a year at no charge, including a free return visit. Call (361) 326-5060 to schedule your inspection and estimate.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Beverly Hills since 2004 as part of the Garrison Partners family.