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.

Call (408-300-8254)Get Free Estimate

CA Lic #1089826Licensed · Insured · Bonded1-2 Hour CallbackPermits HandledManual D Design

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

1. Call or Book Online

Call (408) 300-8254. We call back within 2 hours. Tell us about your project — new construction, addition, or replacement.

2. 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.

3. Custom Quote (Written, No Surprises)

Written quote with: duct material type, number of supply and return registers, permit fees, timeline, and total price.

4. Permits + Scheduling

We pull the permit with your city. Schedule the installation.

5. 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.

6. Airflow Testing + Final Walkthrough

We test airflow at each register to confirm design targets. Walk you through register locations, filter changes, and maintenance.

Pricing

For an accurate quote for your home, call (408-300-8254).

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

What can affect your quote:

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

How long does ductwork installation take?

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.

How is ductwork installation different from duct repair?

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.

Do I need a permit for new ductwork installation in Santa Clara?

Yes. All Bay Area cities require permits for new ductwork installation. EVS handles this — we pull the permit and schedule inspection.

What size ductwork do I need for my home?

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.

Can you install ductwork for any HVAC brand?

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.

Can EVS install ductwork in a home with no existing ducts?

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.

What's the difference between flex duct and metal duct?

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.

Does new ductwork increase home value?

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.

Does EVS design ductwork for additions?

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.