Actual EVS work

Bay Area HVAC service

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 Handled

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 about yours:

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.

What you get from an EVS install

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.

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.

From first call to finished job

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 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

Get an accurate quote

(408) 300-8254

Owner on every installNo subcontractorsFree estimates

Typical ranges for planning

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

01 / 04

Service	What to expect
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.

Customer reviews

5.0

58 Google reviews

Customers who had this exact work done

Real Google reviews, matched to this page — same people, same job.

“My husband and I needed an upgrade in duct installation and a new furnace. Highly recommend using this company. They were reliable, clean and on time. Super friendly workers and listened to our concerns. Especially with a big expense like this we wanted to make sure we got what we paid for and I'm glad to say we did.”

Rose Cortes

Duct installation + new furnace · Bay Area

Verified

“EVS Mechanical is a great HVAC company! They were very professional, on time, explained everything and had a very competitive price. Axel, George and the team were great to work with.”

Rosalyn Yu

Furnace & ductwork, competitive price · San Jose

Verified

Read all 58 Google reviews

Before you decide

Clear language before a big decision.

Manual D

The professional standard for residential duct design.

Ductwork installation

Designing and installing a new system of air distribution ducts for your home's HVAC system.

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.

Bay Area Specifics

New Construction Requirements

Santa Clara, San Jose, and most Bay Area cities have Title 24 energy code requirements that affect duct design — insulation levels, duct sealing requirements, and testing protocols. EVS designs to meet or exceed these requirements.

Crawlspace vs Attic

Homes in Santa Cruz, Los Gatos hills, and older Santa Clara neighborhoods often have crawlspace ductwork. Newer construction and homes with forced-air HVAC typically have attic ducts. EVS designs for your specific access conditions.

Older Home Duct Retrofit

Many pre-1960 Bay Area homes have no ductwork at all — they used gravity furnaces or radiators. Adding ducts to these homes requires careful planning to minimize wall and ceiling damage. EVS designs routing that balances access, aesthetics, and performance.

PG&E Energy Efficiency

Well-designed ductwork improves the efficiency of any HVAC system. Properly sealed and insulated ducts can reduce energy waste by 20-30% compared to leaking or uninsulated ducts. This directly lowers your PG&E bills.