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.
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 EVS:
- 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.
Why EVS?
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.
Our Process
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.
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.
Written Estimate
You get a written estimate with: what we found, what needs repair, the method (sealant, tape, section replacement), labor, and total price.
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.
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.
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.
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.
Written Estimate
You get a written estimate with: what we found, what needs repair, the method (sealant, tape, section replacement), labor, and total price.
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.
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 installations by EVS Mechanical
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
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
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
Pricing
Typical ranges for planning:
| Service | Notes |
|---|---|
| Duct leak inspection + seal (minor) | Single leak or disconnected joint |
| Multiple leak repairs | Several seams, accessible attic/crawlspace |
| Flex duct replacement (per section) | Crushed or kinked flex duct |
| Full duct system seal | All accessible joints and seams in home |
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.
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.
Service Areas
EVS Mechanical provides duct repair throughout the Bay Area:
Related Services
Professional ductwork installation and replacement
Fast, reliable HVAC repair service
Routine HVAC tune-ups to prevent breakdowns
Central air conditioning installation and replacement
Gas furnace installation and replacement