Air Duct Repair in Palo Alto - Tested First, Written Price Second

Trusted Air Duct Repair for Palo Alto Homeowners

Damaged ductwork quietly wastes 20 to 30 percent of the air your HVAC system moves. In Palo Alto, that number trends higher in older Eichler and mid-century homes where original ductwork has outlived its design life by decades. We repair, replace, and install duct systems using professional-grade equipment, not improvised tools, and we do it as a standalone service, not a sideline. Led by Neal Drummond, our crew works throughout Palo Alto on systems ranging from 1960s ranch homes in Midtown to newer builds in the Stanford foothills. If you suspect a leak, tear, or collapsed section, call (833) 620-7085 and we’ll diagnose it properly.

Call (833) 620-7085

HVAC Duct Installation

HVAC Duct Installation is the process of designing and installing a complete duct system that moves conditioned air from your furnace or heat pump to every room in the house. You need it when your home was built without central ducting – common in older Palo Alto homes that originally relied on radiators or wall heaters – or when the existing layout is so badly sized that patching won’t fix the airflow imbalance. We handle full residential and light-commercial installation jobs using rigid sheet metal and insulated flex duct, never consumer-grade materials from a big-box store. Whole-home HVAC duct installation in Palo Alto typically runs $4,500 to $11,000 depending on square footage, accessibility, and the number of supply and return runs. Every job starts with a Manual J load calculation so the duct sizing matches the actual heating and cooling demand, not a rule of thumb.

New Construction and Room Additions

Adding a bedroom or ADU in Palo Alto means extending the duct system correctly, not tapping into an existing run and hoping for the best. We size the new branch line to the room’s calculated load, install a dedicated return if the room count requires it, and seal every joint to the same standard as the rest of the system.

Replacing Undersized or Aging Systems

Homes in Barron Park and Greenmeadow often have ductwork sized for a furnace that was replaced years ago with a smaller or larger unit. We re-run the calculations and replace duct sections that no longer match the equipment, which fixes hot and cold spots that no amount of filter changing will solve.

See our Air Duct Repair in Palo Alto page for what’s involved in fixing existing ductwork before committing to a full install.

Air Duct Replacement

Air Duct Replacement means removing sections of your existing duct system that are beyond repair and installing new ductwork in their place. You need it when ducts are crushed, rusted through, or so loaded with decades of debris that cleaning can’t restore proper airflow. In Palo Alto, we frequently replace duct runs in crawlspaces under mid-century homes where moisture and rodents have done real damage. Air duct replacement in Palo Alto typically costs $2,800 to $7,500 for a partial system replacement, depending on how many runs are affected and how accessible the crawlspace or attic is. We use sealed sheet metal for main trunks and insulated flex for branch runs, with every connection mechanically fastened and sealed.

Sections Beyond Repair

Crushed ductwork in a tight crawlspace can’t be reshaped, and rusted steel sections can’t be resealed. We cut out the damaged segment and splice in a matched replacement, restoring airflow without tearing out the entire system.

Post-Remediation Replacement

If you’ve had mold or pest remediation in Palo Alto – common in homes near the Baylands where humidity runs high – the contaminated duct sections often need to come out entirely. We coordinate with your remediation team to replace what was removed, using materials that match the surviving system.

Not sure if repair or replacement is the right call? The page on Air Duct Repair in Menlo Park explains the same decision process we apply here in Palo Alto.

Ductwork Repair

Ductwork Repair is the targeted restoration of damaged duct sections – sealing leaks, patching holes, rejoining separated connections, and reinforcing sagging runs – without replacing the whole system. You need it when your energy bill is climbing, some rooms never reach temperature, or you can feel air escaping around a register boot. In Palo Alto, we see loose duct connections in older homes more than any other single fault, followed closely by torn flex duct in attics. Ductwork repair in Palo Alto typically runs $350 to $1,800 depending on the number of leaks found and where they’re located. We use mastic sealant and foil-backed tape rated for HVAC, not contractor-grade duct tape that dries out and fails.

Sealing Leaks and Separated Joints

A separated duct joint in a crawlspace can leak half the air your system moves before it ever reaches a register. We use sheet-metal screws and mastic to rejoin and seal the connection, then test the repair with a duct leakage tester.

Repairing Collapsed or Kinked Flex Duct

Flex duct that’s been kinked during installation or crushed by stored items in an attic can cut airflow to a room by 70 percent or more. We remove the damaged section, replace it with properly supported flex, and strap it so it holds its shape.

Duct Replacement

Duct Replacement is a complete system replacement – removing all existing ductwork and installing new supply and return runs throughout the home. You need it when your ducts are 40 to 50 years old, the insulation has deteriorated, or repeated repairs are costing more each year than a new system would. In Palo Alto, homes built before 1980 often have uninsulated or lightly insulated ducts that sweat in summer and leak conditioned air into attics and crawlspaces. Full duct replacement in Palo Alto typically runs $6,000 to $14,000 depending on home size, number of zones, and crawlspace access. We quote one flat price per system agreed before work starts.

Complete System Failure

When multiple duct sections are rusted, rodent-damaged, or disconnected, patching becomes a losing game. We remove everything, install new ductwork sized to your current equipment, and seal and test the entire system before we leave.

Insulation and Efficiency Upgrades

Replacing ductwork is the right time to upgrade to R-8 insulated flex duct and sealed sheet-metal trunks. In Palo Alto’s mild climate, this upgrade reduces heat gain in summer and keeps your HVAC from working harder than it needs to.

For a look at how we handle the same work one city north, see Air Duct Repair in San Mateo.

Ductwork Installation

Ductwork Installation is the physical installation of duct systems, from main trunk lines to individual supply runs and return air pathways. You need it when building new, converting a space, or correcting a system that was never installed properly in the first place. In Palo Alto, we see plenty of poorly installed ductwork in homes that were flipped quickly – flex duct that sags, hard 90-degree bends that choke airflow, and joints that were never sealed. Ductwork installation for a new system or major remodel in Palo Alto typically runs $3,500 to $9,000 depending on scope. We build every system to ACCA Manual D standards, with properly sized takeoffs, short flex runs, and accessible dampers.

Remodels and Gut Renovations

When walls come down in a Palo Alto remodel, the old ductwork often can’t be saved or reworked. We install new runs that match the new floor plan, coordinate with your general contractor, and keep the schedule tight so your project doesn’t stall.

Adding Zones and Returns

Many older Palo Alto homes have a single central return, which means bedrooms get stuffy when doors are closed. We install dedicated return ducts in bedrooms and add zone dampers where it makes sense, so your system finally balances.

Brands We Service

We’re factory-authorized to install and service Honeywell and Aprilaire filtration products. That means we can do more than clean the ducts – we can improve air quality at the source by installing a media filter cabinet, electronic air cleaner, or whole-home dehumidifier that works with your existing system. We stock genuine Honeywell replacement filters and Aprilaire media, so you’re not shopping for knockoffs online.

On the equipment side, our duct cleaning and repair process is built around Rotobrush brush-contact systems and Nikro HEPA negative-air machines. We use Abatement Technologies containment products during repairs and cleanings in Palo Alto homes where dust control matters most. Whether you have a Honeywell thermostat, an Aprilaire filter, or any other make of HVAC equipment, we can service the ductwork connected to it. From cleaning to repair, we’re a single provider for the whole system.

Signs You Need a Pro Right Now

• Rooms that never reach temperature. If one bedroom in your Palo Alto home is always five degrees off from the others, the problem is usually a disconnected or collapsed duct run serving that room. Airflow testing will pinpoint it fast.
• Dust accumulating days after cleaning. Loose duct joints pull in attic or crawlspace air – and the dust, insulation fibers, and whatever else lives there. Sealing the system stops the infiltration at the source.
• Whistling or flapping sounds from vents. Air rushing through a gap or a loose damper makes noise that’s impossible to miss once you know what it is. That sound is conditioned air you paid for escaping somewhere it shouldn’t.
• Mold or musty smell from registers. In Palo Alto, humidity near the Baylands and in shaded older homes can condense inside uninsulated ducts. That moisture supports mold growth, and cleaning alone won’t fix it – the affected duct section needs to come out.
• Energy bills climbing with no obvious cause. PG&E rates in Palo Alto aren’t going down. If your usage is up but your comfort isn’t, leaking ducts are a common culprit. A duct leakage test will show you exactly how much air you’re losing.

Our Process, Step by Step

1. 1
   Inspection and testing. We start by examining every accessible section of ductwork in your Palo Alto home – attic, crawlspace, and registers. We run a duct leakage test to measure exactly how much air your system is losing, and we show you the numbers.
2. 2
   Flat-price proposal. After testing, we give you one flat price for the repair, replacement, or installation work needed. No per-vent pricing, no add-ons discovered after the fact. You approve the work before we start.
3. 3
   Containment and protection. We use Abatement Technologies containment products to seal off the work area, and we run a Nikro HEPA negative-air machine during any work that disturbs debris. Your living space stays clean.
4. 4
   Repair or installation. Our crew makes the repairs or installs the new ductwork using sealed sheet metal and insulated flex duct. Every joint is mechanically fastened and sealed with mastic. We don’t rush, and we don’t leave unfinished work.
5. 5
   Verification and walkthrough. After the work is done, we re-test the system and show you before-and-after photos of your ductwork. You’ll see exactly what was repaired, what was replaced, and how the airflow numbers improved.

How Much Does Air Duct Repair Cost in Palo Alto?

Our Service Area Near Palo Alto

We work throughout Palo Alto and the surrounding peninsula communities, including Menlo Park, San Mateo, Los Altos, Woodside, East Palo Alto, Stanford, and North Fair Oaks. Most Palo Alto appointments are scheduled within three to five business days, and we carry parts for the most common duct sizes and connections on every truck. If you’re in a neighboring city and need the same service, reach out – we keep our schedule open for peninsula homeowners who need the work done right.

Frequently Asked Questions About Air Duct Repair in Palo Alto

Schedule Your Air Duct Repair Service in Palo Alto Today

Leaking, damaged, or undersized ductwork isn’t going to fix itself, and every month it runs it’s costing you money and comfort. Call (833) 620-7085 to schedule a free inspection and flat-price estimate. Neal Drummond and our crew serve Palo Alto and the entire peninsula with professional-grade equipment, honest pricing, and work you can see before and after. We’ll show you what’s actually inside your ducts, and we’ll tell you straight what needs fixing.

Written by Neal Drummond, Owner at Air Duct Cleaning Palo Alto, serving the Palo Alto area and surrounding peninsula communities.