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Call or Book Online
Call (408) 300-8254. We call back within 2 hours. Tell us what you're experiencing — uneven temps, high bills, dust, or noise.
Actual EVS work
Bay Area HVAC service
Duct Repair & Ductwork Sealing in Santa Clara & the Bay Area
Professional duct repair, leak sealing, and airflow restoration for Bay Area homes. Fix hot and cold spots, reduce energy waste, and improve indoor air quality. Licensed and insured. Permits handled where required. Family-run.
CA Lic #1089826Licensed · Insured · Bonded1-2 Hour CallbackPermits Handled
Duct repair in Santa Clara and the Bay Area — EVS Mechanical repairs leaking, damaged, and undersized ductwork for homes with Carrier, Bryant, Goodman, Daikin, and Lennox HVAC systems. Every repair includes inspection, sealing, and airflow testing. Call (408) 300-8254 for a free estimate.
What Is Duct Repair?
Duct repair means fixing your home's ductwork — the network of metal, fiberglass, or flexible tubing that carries heated and cooled air from your HVAC system to each room. Over time, ducts develop leaks, come apart at seams, get crushed or kinked, or become clogged with debris. Duct repair restores proper airflow, improves system efficiency, and can lower your energy bills.
When to call about yours:
- Some rooms are noticeably hotter or colder than others
- Your energy bills are high and your HVAC system is relatively new
- You can see visible damage to exposed ductwork in your attic or crawlspace
- There's excessive dust or debris coming from your vents
- Your system runs constantly but never seems to catch up
- You hear whistling, rattling, or whooshing sounds from vents
Who this is for: Homeowners in Santa Clara, San Jose, Sunnyvale, Mountain View, Palo Alto, Los Gatos, Santa Cruz, Cupertino, Campbell, Saratoga, Los Altos, and Milpitas. Residential and light commercial.
What you get from an EVS install
Diagnosis before repair.
We don't guess where the problem is. We inspect the full duct run, measure airflow at each register, and use a pressure test to find leaks.
Permanent fixes, not tape jobs.
We use mastic sealant and metal-backed foil tape — not standard duct tape, which degrades within a year in attics.
Permits handled.
Some duct repairs require permits depending on scope. EVS handles the paperwork when needed.
1-2 hour callback.
Call (408) 300-8254. We call back within 2 hours.
Works with any system.
Carrier, Bryant, Goodman, Daikin, Lennox, or any other brand — duct repair isn't brand-specific.
Family-run.
Euler Vargas oversees every job. No subcontractors. No national call center.
Diagnosis before repair.
We don't guess where the problem is. We inspect the full duct run, measure airflow at each register, and use a pressure test to find leaks.
Permanent fixes, not tape jobs.
We use mastic sealant and metal-backed foil tape — not standard duct tape, which degrades within a year in attics.
Permits handled.
Some duct repairs require permits depending on scope. EVS handles the paperwork when needed.
1-2 hour callback.
Call (408) 300-8254. We call back within 2 hours.
Works with any system.
Carrier, Bryant, Goodman, Daikin, Lennox, or any other brand — duct repair isn't brand-specific.
Family-run.
Euler Vargas oversees every job. No subcontractors. No national call center.
From first call to finished job
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Diagnostic Inspection
We inspect all accessible ductwork — attic, crawlspace, basement, and wall chases where visible. We use a manometer to measure static pressure and identify leaks and restrictions.
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Written Estimate
You get a written estimate with: what we found, what needs repair, the method (sealant, tape, section replacement), labor, and total price.
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Repair Work
We seal all accessible leaks with mastic and metal-backed tape. Replace damaged sections where needed. Reattach disconnected joints. Secure sagging flex duct. Test airflow at registers after completion.
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Final Testing + Walkthrough
We measure airflow at each register to confirm improvement. Walk you through what was fixed and how to monitor for future issues.
Our Work
Real installs — our crew on every job
Gas furnace installed in closet alcove
Carrier outdoor condenser unit on pad
Bryant gas furnace in garage
TOSOT heat pump outdoor unit
Furnace on raised platform in utility closet
Air handler with insulated ductwork in attic
HVAC unit with ductwork in crawlspace
Furnace installation in garage
Garage HVAC system wide view
EVS technicians servicing a Lochinvar commercial rooftop unit
EVS technician working on commercial rooftop HVAC equipment
Two TOSOT heat pump units installed on a flat roof
New TOSOT heat pump installation on a flat roof
TOSOT inverter heat pump dual-fan condenser
TOSOT heat pump with EnergyGuide rating, rooftop install
TOSOT condenser unit secured on a flat roof
Completed rooftop heat pump installation, wide view
Air handler with new insulated ductwork installation
Pricing
Typical ranges for planning
Higher cost:
Limited access (crawlspace, tight attic), multiple stories, asbestos-wrapped old ducts (requires remediation before repair)
Lower cost:
Easy attic access, single-story, minor repair, bundled with new HVAC installation
Financing: Coming soon — call for current options.
Homeowner Proof
5.0
49 Google reviews
Clean work. Clear prices. People who answer after the install.
Customers remember the details: showing up, explaining the options, protecting the home, and standing behind the system later.
“We converted our home from a gas furnace to a full electric heat pump system and upgraded to a two-zone setup, giving each floor its own temperature control. EVS guided us through every step, explained our options clearly, and made a complicated project feel straightforward. The installation was clean and completed with a high level of craftsmanship — and their pricing was the most competitive of all the quotes we received.”
AOVerified
Aditya O.
Gas-to-heat-pump conversion, two zones · Bay Area
“Really impressed with EVS Mechanical — they earned every one of these five stars. The heat pump they installed has been incredibly efficient, and our energy bills have actually dropped. They showed up exactly when they said they would and were careful with our home during the installation. Would absolutely recommend EVS to anyone in the Bay Area.”
NVerified
Nate
Heat pump installation · Bay Area
“EVS Mechanical made what could have been a stressful process incredibly smooth. They diagnosed and repaired our HVAC system quickly and got everything running again. They didn't just do the work — they made sure we understood what was happening and why. Honest pricing, no upselling on things we didn't need. If you need HVAC work done right, call EVS Mechanical.”
MCVerified
Michael C.
HVAC repair · Bay Area
“I called EVS for a regular furnace service and they were here very quickly. They performed the service in one day and also discovered the very old condensate pump was not working properly causing water to pool around the furnace. They replaced the pump the next day. Would definitely use their services again.”
CHVerified
Christopher H.
Furnace service & repair · Bay Area
“Euler and his team were able to replace our 23 year old attic Carrier furnace after our existing unit's heating chamber failed. I called him at 10am, and he was at my house by 11am, diagnosed the issue and found a new replacement unit and had it installed by 4pm. Very friendly and great price too.”
BRVerified
Byron R.
Same-day furnace replacement · Bay Area
“We had a great experience with Euler at EVS Mechanical installing a heat pump heating and A/C system in our home. He was professional, knowledgeable, and easy to work with from start to finish. The installation was clean and efficient, and the system works beautifully. Highly recommend!”
AGVerified
Ani G.
Heat pump installation · Scotts Valley
“I had a great experience with Euler & Axel. They came promptly to check my AC issue and quickly assessed the problem. I really appreciated that I had already received a clear quote upfront, so there were no surprises. They also went above and beyond by helping with my dryer. Professional, reliable, and efficient.”
VRVerified
Varsha R.
AC repair · Bay Area
“EVS Mechanical is a great HVAC company! They were very professional, on time, explained everything and had a very competitive price. They found asbestos and we had to replace our entire furnace and duct work — it was done in a week. They filed the permits and handled everything. I highly recommend them.”
RYVerified
Rosalyn Y.
Furnace & ductwork · San Jose
“Excellent experience with Euler. Very professional, punctual, knowledgeable, and genuinely helpful. The installation was completed on time with an exceptionally clean job. Nearly a year after the installation, I contacted him about a repair issue. He fixed the problem without any hassle. Highly recommend.”
AAVerified
Aditya A.
Installation & follow-up repair · Bay Area
Frequently Asked Questions
Common signs: rooms that never reach the thermostat temperature, higher energy bills than expected, excessive dust from vents, whistling sounds, and your system running longer than it used to. EVS can confirm with a pressure test during a site visit.
Yes. Leaking ducts can waste 20-30% of conditioned air. Sealing them typically reduces HVAC runtime and energy consumption. Many homeowners see the repair pay for itself in 1-2 years through lower PG&E bills.
Minor repairs (1-2 leaks) take 1-2 hours. A full duct system seal takes 4-8 hours depending on home size and access.
Usually yes. Uneven temperatures are often caused by leaking ducts, disconnected ducts, or undersized branch runs. EVS diagnoses the root cause during inspection.
Yes. Duct repair isn't brand-specific. We work with any HVAC system — Carrier, Bryant, Goodman, Daikin, Lennox, or others. Ductwork connects to any brand the same way.
Minor duct repairs typically don't require permits. Major repairs or full replacement do. EVS handles permit determination during the inspection.
No. Standard duct tape degrades within a year in attic temperatures. EVS uses mastic sealant and UL-listed metal-backed foil tape for permanent repairs.
Yes. Leaking return ducts pull unfiltered air from your attic, crawlspace, or wall cavities into your HVAC system and distribute it throughout your home. Sealing these leaks keeps that air out.
Yes. If your ducts are clean but leaking, we repair them. If they have accumulated dust or debris, we recommend cleaning first, then repair if needed. Ask during your estimate.
Bay Area Specifics
Older Homes
Bay Area homes built before 1960 often have original ductwork — metal ducts that are still structurally sound but may have disconnected at joints or accumulated decades of debris. Many have no return ducts in bedrooms, which creates pressure imbalances.
Attic Ducts in South Bay Summers
Santa Clara, San Jose, Cupertino, and Saratoga summer attics can reach 130-150°F. Leaking ducts in these attics lose significant cooling capacity. Sealing attic ducts is one of the most cost-effective improvements for South Bay homes.
Crawlspace Ducts
Homes in Santa Cruz and the Los Gatos hills often have crawlspace ductwork. Moisture, pests, and insulation degradation are common issues. EVS evaluates crawlspace ducts carefully during inspections.
PG&E Connections
Leaking ducts force your HVAC system to run longer, increasing PG&E gas (winter) and electric (summer) bills. Duct repair typically pays for itself within 1-2 heating/cooling seasons in energy savings.
Service Areas
duct repair across the Bay Area — pick your city:
San JoseHVAC services in the heart of Silicon ValleyRead moreSanta Claraduct repair near our main officeRead moreSunnyvaleResidential and light commercial HVACRead moreMountain ViewHVAC for tech corridor homes and officesRead morePalo AltoHVAC installation for older and newer homesRead moreCupertinoduct repair for valley homesRead moreCampbellFull-service HVAC contractorRead moreSaratogaHVAC for hillside and valley homesRead moreLos AltosResidential HVAC servicesRead moreLos GatosHVAC for homes and light commercialRead moreSanta CruzCoastal HVAC installation and repairRead moreMilpitasEast Bay HVAC servicesRead more
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