Ductwork Installation in Santa Clara & the Bay Area
New ductwork installation, duct system redesign, and duct replacement for Bay Area homes. Properly sized ducts designed to Manual D standards. Metal and flex duct options. Permits handled. Family-run.
Ductwork installation in Santa Clara and the Bay Area — EVS Mechanical installs new ductwork for new construction, additions, and HVAC replacement that needs redesigned duct systems. Every installation includes Manual D duct design, permit handling, and airflow testing. Call (408) 300-8254 for a free estimate.
What Is Ductwork Installation?
Ductwork installation means designing and installing a new system of air distribution ducts for your home's HVAC system. This is different from duct repair — installation starts from scratch, whether for new construction, a major addition, or replacing an old, undersized, or poorly designed duct system. Proper duct design is just as important as proper equipment sizing.
When to call EVS:
- You're building a new home or major addition
- You're finishing a basement, attic, or garage conversion
- Your current ducts are undersized, collapsed, or beyond repair
- Your HVAC replacement requires redesigned ductwork
- You have no ducts at all (older home) and want central HVAC
- Your current system was designed by a general contractor, not an HVAC professional
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. Also new construction and light commercial.
Why EVS?
Manual D design.
We design your duct system to ACCA Manual D standards — the professional standard for residential duct design. Not "what fits." Not "what we have on the truck."
Proper sizing to match your HVAC unit.
Ducts must match the airflow requirements of your furnace, AC, or heat pump. Undersized ducts cause noise, short cycling, and premature equipment failure.
Permits handled.
Every Bay Area city requires permits for new ductwork installation. EVS pulls the permit and schedules the inspection.
1-2 hour callback.
Call (408) 300-8254. We call back within 2 hours.
Material options.
Metal duct, flex duct, or combination — we recommend based on your home, budget, and access.
Family-run.
Euler Vargas oversees every installation. No subcontractors.
Our Process
Call or Book Online
Call (408) 300-8254. We call back within 2 hours. Tell us about your project — new construction, addition, or replacement.
Site Visit + Duct Design
We measure the home, check attic/crawlspace access, and design the duct system. This includes calculating required CFM for each room, sizing trunk lines and branches, and planning register locations.
Custom Quote (Written, No Surprises)
Written quote with: duct material type, number of supply and return registers, permit fees, timeline, and total price.
Permits + Scheduling
We pull the permit with your city. Schedule the installation.
Installation
We install trunk lines, branch ducts, registers, and returns. Insulate ducts in unconditioned spaces. Seal all joints with mastic. Connect to your HVAC equipment.
Airflow Testing + Final Walkthrough
We test airflow at each register to confirm design targets. Walk you through register locations, filter changes, and maintenance.
Call or Book Online
Call (408) 300-8254. We call back within 2 hours. Tell us about your project — new construction, addition, or replacement.
Site Visit + Duct Design
We measure the home, check attic/crawlspace access, and design the duct system. This includes calculating required CFM for each room, sizing trunk lines and branches, and planning register locations.
Custom Quote (Written, No Surprises)
Written quote with: duct material type, number of supply and return registers, permit fees, timeline, and total price.
Permits + Scheduling
We pull the permit with your city. Schedule the installation.
Installation
We install trunk lines, branch ducts, registers, and returns. Insulate ducts in unconditioned spaces. Seal all joints with mastic. Connect to your HVAC equipment.
Airflow Testing + Final Walkthrough
We test airflow at each register to confirm design targets. Walk you through register locations, filter changes, and maintenance.
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 |
|---|---|
| New ductwork — single-story home | Complete duct system, supply and return |
| New ductwork — two-story home | Additional runs, more complex routing |
| Ductwork for addition (1-2 rooms) | Extending existing system |
| Retrofit ducts in older home | No existing ducts — more labor for routing |
Higher cost:
Two-story homes, limited attic/crawlspace access, plaster-and-lathe walls (harder to cut), multiple stories, distant rooms requiring long flex runs
Lower cost:
Single-story with open attic access, new construction (no existing finishes to work around), installation bundled with new HVAC equipment
Financing: Coming soon — call for current options.
Frequently Asked Questions
A full-home ductwork installation typically takes 1-3 days. New construction (wide open access) is faster. Retrofits in existing homes take longer due to working around finished ceilings and walls.
Duct repair fixes existing ducts. Ductwork installation means designing and installing a completely new system. If your existing ducts are in decent shape, repair is sufficient. If they're undersized, deteriorating, or if you're adding rooms, new installation is the right solution.
Yes. All Bay Area cities require permits for new ductwork installation. EVS handles this — we pull the permit and schedule inspection.
Duct size depends on your HVAC equipment's airflow (CFM), the length of each duct run, and the number of rooms. This is determined by a Manual D design calculation — not a rule of thumb. EVS performs this as part of the quote process.
Yes. Ductwork connects to any brand of furnace, AC, or heat pump the same way — through the equipment's supply and return plenums. We design ducts to match the airflow specifications of your specific unit.
Yes. This is a common project for older Bay Area homes that were built with gravity furnaces, radiators, or wall heaters. We design the routing and install the full system.
Flex duct is flexible, less expensive, and easier to install in tight spaces. Metal duct is rigid, more durable, and has lower airflow resistance. Most installations use metal for main trunk lines and flex for branch runs to individual rooms.
In homes without existing ducts, adding ductwork increases the home's HVAC options significantly — you can install central AC, a heat pump, or a new furnace. In homes with old or undersized ducts, replacement improves system efficiency and comfort, which is a selling point.
Yes. If you're adding a room, finishing a garage, or converting a basement, EVS can extend your existing duct system or design a new independent system for the addition.
Service Areas
EVS Mechanical provides ductwork installation throughout the Bay Area:
Related Services
Duct sealing, repair, and airflow restoration
Fast, reliable HVAC repair service
Central air conditioning installation and replacement
Gas furnace installation and replacement
Energy-efficient heating and cooling from one system