Purified Air Heating and Air Conditioning
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AC Replacement & Installation in Altadena, CA

Whether you are replacing a system that has reached the end of its life or specifying cooling for a home being rebuilt, the sizing decisions made at the start determine how the system performs for the next fifteen years.

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Purified Air technicians servicing an outdoor AC unit

AC Installation for Altadena Homes

Altadena sits higher than the valley floor, and the difference shows up in how cooling systems behave here. Days get hot, but evenings cool off more reliably than they do a few miles south, which means a system sized as though it were operating in Encino or Sherman Oaks will be oversized for many Altadena homes. Oversized equipment short cycles, never runs long enough to dehumidify properly, and wears out its compressor early.

We size systems from a load calculation specific to the building — square footage, insulation, window area and orientation, ceiling height. As a Lennox Certified Dealer, Purified Air installs equipment matched to those numbers rather than to the capacity printed on the unit being removed.

Signs It Is Time to Replace

Replacement generally becomes the better value when several of these apply at once:

  • Twelve to Fifteen Years of Service: Beyond that range, both reliability and efficiency decline noticeably.
  • Repairs Becoming Annual: Once service calls are a yearly expectation, the money is better invested in new equipment.
  • Phased-Out Refrigerant: Systems still running R-22 cost substantially more to recharge every time they need it.
  • Rooms That Never Cool Properly: Frequently a sizing or distribution fault that a like-for-like swap will simply repeat.
  • Climbing Summer Bills: Efficiency losses compound year on year, and modern equipment can cut cooling costs meaningfully.
Technician testing a Lennox air conditioner

Specifying a System for a Rebuild

A significant amount of our Altadena work now involves homes being rebuilt, where the HVAC system is being specified from scratch rather than replaced. That is an opportunity worth using properly:

  • Design Before Construction: Duct routing planned during framing costs far less and performs better than ducts fitted afterwards.
  • All-Electric Options: New construction often makes a heat pump the more sensible choice for both heating and cooling.
  • Current Code Compliance: Title 24 requirements affect equipment selection, duct sealing and verification testing.
  • Right-Sizing a Tighter Building: A new, well-insulated home needs considerably less capacity than the house it replaces.
  • Zoning From the Start: Designing zones in during construction is dramatically cheaper than retrofitting them later.

How an Installation Runs

Every installation follows the same defined sequence:

  1. Free In-Home Estimate

    Assessment of the building and existing system, with written options at different price points.

  2. Load Calculation

    Capacity derived from the home's actual heat gain rather than a rule of thumb.

  3. Permits and Scheduling

    Required permits pulled and inspections coordinated.

  4. Installation

    Old equipment removed and disposed of, new system installed and charged to specification.

  5. Commissioning

    Airflow and temperature split verified, warranty registered, operation explained before we leave.

Get a Free Altadena Installation Estimate

A correctly specified system installed properly will outperform a larger one installed carelessly, every time. Purified Air provides free written estimates and financing for Altadena homeowners. Call to arrange an in-home consultation.

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

esme diaz

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

Dulce Ramirez

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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