Alex Air & Heating Services LLC logoAlex Air & HeatingServices LLC
Duct Repair

Stop wasting air — seal it up.

Expert duct repair across the Inland Empire & LA County — we find and seal leaks and disconnects so you stop losing conditioned air and uneven comfort.

Call 626-777-4822Schedule service

Appointments based on current availability · Open Mon–Sun · 8:00 AM – 6:00 PM.

Alex Air & Heating technician performing duct repair in the Inland Empire & LA County

Availability

Service is available across the Inland Empire and East LA County. Call during business hours to confirm the next open appointment.

Quick answer

Duct Repair from Alex Air & Heating Services LLC: Seal leaks and restore airflow with expert duct repair. We serve Ontario, the Inland Empire & East LA County with appointments based on availability, an EPA 608-certified technician and upfront, written pricing. Call 626-777-4822 during business hours to confirm availability.

Residential & Commercial

Leaky, damaged ducts can waste up to 30% of your conditioned air — driving up bills and leaving rooms uncomfortable. We locate leaks, disconnects and damage, then seal and repair your ductwork to restore balanced, efficient airflow.

What's included

  • Leak detection & sealing
  • Reconnection of detached ducts
  • Insulation repair & replacement
  • Improved comfort & lower bills

Why choose Alex Air & Heating

EPA-Certified
Written Pricing
Availability Confirmed by Phone
Documented Service Scope

Backed by our warranty

Labor warranty 3 Years · Parts warranty 5 Years · Compressor warranty 7 Years. No hidden fees — you approve the price before we begin.

Why choose Alex Air & Heating

What you actually get when you call us.

Appointments based on availability.

Call during business hours to confirm the next available appointment. Timing depends on the current schedule.

Upfront pricing, no surprises.

We diagnose, quote, and explain — then you decide. You approve the price before any work begins, with no hidden fees at the end.

Every make & model.

Our EPA-certified technicians evaluate major HVAC system types and explain any parts or follow-up work the documented diagnosis requires.

How it works

Four steps. No surprises.

01

You call

Reach us at 626-777-4822. We'll book your appointment and share a real arrival window — not an all-day block.

02

We diagnose

A full system inspection — refrigerant, electrical, airflow and controls — to find the real root cause, not just the symptom.

03

You approve

You get an upfront, flat price before any work starts. Repair or replace? We give you the honest numbers.

04

We complete the approved scope

We perform the work you authorize, test the relevant operation, clean the work area, and explain any documented follow-up.

Related services

Round out your home comfort.

Popular services and plans homeowners pair with this one.

Duct Replacement

Full duct replacement for maximum efficiency and comfort.

Learn more

Maintenance Membership

Just $199 per system per year — an annual tune-up, 10% off all repairs, no overtime fees and free filters.

See membership perks
Good to know

Duct Repair FAQs

Uneven room temperatures, high energy bills and excessive dust are common signs. We can inspect and test your ductwork to confirm.

Leaky ducts can waste up to about 30% of your conditioned air, driving up bills and leaving some rooms uncomfortable.

Often, yes — duct leaks and imbalances are a common cause of hot and cold spots, and we can correct them.

If the damage is localized, repair is usually best. If ducts are old or undersized throughout, replacement may be the smarter long-term fix — we'll advise honestly.

Service information maintained by Yuan Pan, Owner & Lead HVAC Technician. EPA 608 Universal Certification.

Related HVAC guidance

Read before you schedule

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Air Duct Sealing Cost in Southern California (2026)

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Service area

Serving the Inland Empire & LA County.

Service-area HVAC business serving the Inland Empire, Los Angeles County & surrounding areas

Check your address

Do we cover your ZIP?

Not sure if you're in our area? Enter your ZIP above — we cover most of the Inland Empire & LA County.

  • EPA-certified technicians
  • Honest, upfront pricing — no hidden fees
  • Appointment availability confirmed by phone

Prefer to talk? Call 626-777-4822

Where we workDon't see your city? Just ask.

19 cities across 4 regions

OntarioRancho CucamongaFontanaUplandMontclairRialtoRedlandsSan BernardinoRiversideCoronaEastvaleJurupa ValleyPomonaClaremontWalnutDiamond BarRowland HeightsChinoChino Hills

Locally owned & operated

An independent local team serving the Inland Empire & LA County.

Clear scheduling

Call during business hours and we'll do everything we can to dispatch a tech the same day.

Fast response times

We answer fast and show up when we say we will.

Need duct repair?

Written pricing, EPA 608-certified expertise, and appointment timing confirmed before you book.

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