Purified Air Heating and Air Conditioning
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Air Duct Repair & Replacement in Altadena, CA

A leaking duct system can lose a quarter of everything your equipment produces before it reaches a single room. The equipment usually gets blamed for it.

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Purified Air technicians servicing an outdoor AC unit

Duct Problems in Altadena Homes

Altadena's housing runs from early-century Craftsman bungalows through mid-century construction to homes going up now, and the ductwork tells you which era you are in. Older properties frequently still run air through ducts that were retrofitted decades ago into attics and crawlspaces with barely enough room to work. Mastic has dried and cracked, tape has released, flex duct has sagged off its straps into shapes that throttle airflow.

There is also a smoke and particulate dimension specific to this area. Ductwork that has drawn ash through it needs assessing on its condition, not just its airtightness — insulation that has absorbed smoke will keep releasing odor into the house every time the blower runs, and no amount of sealing fixes that.

Signs the Ducts Are the Problem

Duct faults almost always present as equipment faults:

  • Rooms That Never Get Comfortable: Especially additions or rooms at the end of a long run.
  • High Bills With Ordinary Use: Air delivered into an attic costs exactly as much to condition as air delivered to a bedroom.
  • Weak Airflow Throughout: Often a trunk line that cannot carry what the equipment is producing.
  • Dust Entering the System: Return-side leaks pull attic air, insulation fibres and dust straight into circulation.
  • Whistling or Rushing Noise: Air moving through a gap or a crushed section is audible in a way sealed duct is not.
  • Persistent Smoke Odor: If it returns whenever the system runs, the ductwork is the likely source.
Technician testing a Lennox air conditioner

Repair or Replace

We will tell you plainly which situation your system is in:

  • Isolated Faults: A few separated joints or one crushed run can usually be repaired in place.
  • Measured Leakage Throughout: When testing shows loss across the system, patching sections rarely holds up.
  • Contaminated Insulation: Smoke-absorbed or moisture-damaged insulation means replacing the affected runs.
  • Undersized Trunk Lines: Where ducts cannot carry the required airflow, only resizing genuinely fixes it.
  • Alongside Equipment Replacement: Doing ducts during a system upgrade costs far less than a separate project later.

How We Approach the Work

Every duct job begins with establishing what is actually wrong:

  1. Full Inspection

    Attic and crawlspace runs inspected end to end rather than sampled.

  2. Leakage Testing

    We measure where air is being lost instead of inferring it from symptoms.

  3. Material Caution

    Pre-1980 duct wrap is treated and tested appropriately, never disturbed casually.

  4. Written Scope and Fixed Price

    You get findings and pricing before any work starts.

  5. Mastic Sealing

    Joints sealed with mastic, which stays flexible for decades, not tape that dries and lets go.

  6. Verification

    Register airflow measured afterwards to confirm the repair achieved what it should.

Get Your Altadena Ductwork Tested

If your system runs constantly and parts of the house still never get comfortable, the ducts deserve investigating before the equipment does. Purified Air inspects and tests ductwork throughout Altadena and quotes at a fixed price. Call to book an assessment.

626-621-2220

Testimonials

Our Customers Love Our Services

Jhoanna Lara

Purified Air Heating and Air Conditioning did a fantastic job fixing my AC when it wasn’t cooling properly. The technician quickly identified the problem and resolved it efficiently. Great service

Addison

I had a great experience with them. Roman was prompt, honest, and offered fair pricing. They were easy to get in touch with and had my issue resolved day of.

Jose Medrano

During the rain I needed my heater to work. Purified Air came checked and made sure my air was like new running like new. They are reliable, easy to work

Kandice Banville

I recently hired Purified Air Inc. to service my heating and air system, and they exceeded all my expectations! From the moment I contacted them, their team was professional, courteous,

Jose Porras

Purified Air Heating and AC has been amazing with our routine maintenance. They’re always on time, professional, and leave everything running smoothly. I feel confident knowing my system is in

Anthony Moreno

Purified Air installed a new AC unit in my home, and I am extremely impressed with their service. The team was punctual, professional, and very knowledgeable. They completed the installation

Tara Avery

Had a really great experience with Roman (owner). Initially my unit’s issue was misdiagnosed by a tech, which lead to needing a callback. Roman reached out to me personally via

Jocelyn Villanueva

I greatly appreciate the excellent service I received from Purified Air Heating and Air Conditioning. They installed a new HVAC system in my home, and the technicians were very respectful

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Purified Air Heating and Air Conditioning installed a new HVAC system in my home, and I couldn’t be happier with the results. They provided a range of financing options that

gabriela gamboa

I called Purified Air Heating and Air Conditioning during a heat wave when my AC stopped working. They were amazing! The technician was friendly, knowledgeable, and fixed the problem quickly.

Jaime Del toro

Very good yob experts. Purified Air did a great job installing our new AC. The team was friendly and worked fast. They made sure everything was working before they left. The

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Purified Air installed a new air conditioning and heating system in my home. The team was professional and knowledgeable, helping me choose the best system. The installation was seamless, and

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