We are thrilled to announce a significant milestone in our journey. Complete Comfort Plumbing, Heating & Air Evolves into John Stevenson Plumbing, Heating & Air Conditioning, Inc. We are excited about the future as we continue to strive for excellence in all our endeavors. Thank you for your trust and continued support! 

Indoor Air Quality

Carlsbad Indoor Air Quality

Call Today & Start Breathing Easier

The air in your home may be a bigger source of concern than you realize. In fact, the air inside is often several times worse than the air outside, and in an environment like Southern California, that’s not a good thing. If you’re struggling from the effects of poor-quality indoor air, the team at John Stevenson Plumbing, Heating & Air can help. Since 1990 we have helped customers just like you take control over their indoor air quality, improving their quality of life and even helping their HVAC system run better than ever.

John Stevenson Tech with Customer and Charlie

Schedule a Carlsbad indoor air quality service with the experts at John Stevenson Plumbing, Heating & Air! Contact us online or at (760) 276-6690 for service today.

Air Balancing

Have you ever noticed that one room in your home feels extremely cold when you run your air conditioner while a room on the other side of the house might as well be just as hot as the temperature outside? This is known as an “unbalanced” HVAC system, and the team at John Stevenson Plumbing, Heating & Air can help you fix it. Our air balancing services modify your duct network to ensure air from your air conditioner and heater seamlessly and evenly travels throughout your home for uniform heating and cooling. This can even help reduce energy bills by improving air conditioner or heater performance.

Air Filtration

 Do you have a constant dust problem? Is pollen a huge problem throughout your home? These are a few of the issues that can be rectified with improved air filtration. Upgrading your HVAC system’s filtration system can significantly increase the amount of airborne particulates that are removed every time air cycles through your HVAC system. Some air filtration systems are standalone and can greatly improve quality in sensitive areas of your home while others can be installed directly in your current HVAC system for improved performance across your property.

Air Purification

Air purifiers go above and beyond air filtration systems to remove or neutralize even dangerous microbes and biological organisms that your filter may not be able to remove on its own. Air purifiers can target things like smoke particles, stale odors, mold spores, bacteria, viruses, VOCs, and so much more, all of which might be in your air without you even knowing.John Stevenson techs taking tools out of van

Humidity Control

Indoor humidity is a bigger problem than most people realize. While Southern California may be known for our temperate climate and fairly dry air, too little humidity can lead to dry skin, frail hair, and plenty of other issues. A whole-home humidifier from John Stevenson Plumbing, Heating & Air fixes this issue by imbuing the air that passes through your HVAC system with humidity. For more precise and comfortable air, call us to find out more about the great options we offer in Carlsbad, Rancho Bernardo, and the surrounding areas!

Contact John Stevenson Plumbing, Heating & Air at (760) 276-6690 for more information about our specialized indoor air quality solutions.

What Makes Us a Community Name?

Benefits of Working with Our Expert Team
  • Drug Tested & Background Checked Technicians
  • Upfront Pricing — You’ll Never Pay More Than You’re Quoted
  • Expert Advice From Professional, Licensed and Certified Technicians
  • We Stock Enough Parts in Our Trucks to Do 93% Of Repairs on the Spot
  • Flexible Scheduling - Ask About Same-Day or Emergency Service
  • 5 Star Service Guarantee Includes Service Tailored to Your Needs & Budget
Frequently Asked Questions
  • Should I replace or repair my AC unit?

    Many customers ask if they should repair a broken air conditioning unit versus a full replacement. Often, a well-maintained and newer AC unit will be able to be repaired depending on the issue. If it is a part under warranty, replacement of the part is a simple fix. However, if the AC is more than 10 years old, has not been regularly serviced, or is in need of a major repair, replacement is the best option. Our team will provide all available options for homeowners to consider.

  • What's a Pre-Installation Evaluation? Does My New A/C Need One?

    In short, yes. A first step is conducting an energy audit to determine the energy load for your home. Calculating the load tells the experts at John Stevenson Plumbing, Heating & Air how much heat your house gains throughout the day & what size air conditioner will work best to keep it cool. This is critical as most A/C installation issues stem from an improperly-sized air conditioning unit.

  • Is Your Home's Ductwork & Design Able to Handle a New A/C System?

    Often your old, existing ducts can’t handle the airflow of a newly installed air conditioner. Any upgrades to accommodate a new system will likely increase the cost to install an A/C unit, but will ultimately help you avoid costly, high energy bills & hot rooms in the future.

  • What Type of Central A/C Unit Should I Install?

    Here’s where the load calculation comes into play, as you want to pick the right size A/C unit to install – either too big or too small of an A/C unit can lead to costly repair or replacement down the road. Call the HVAC professionals at John Stevenson Plumbing, Heating & Air, they’ll know which A/C unit is perfect to install in your home at the lowest price.

  • How Much Does it Cost To Get My Air Conditioning Unit Installed?

    The price of replacing your air conditioning unit depends a lot on the size of the unit you need to fit the size of your house. But no matter what unit you pick out for your home, ask an expert at John Stevenson Plumbing, Heating & Air for fast answers & reliable service. Trained technicians can come to your house to give you an upfront, transparent installation report, as well as consult you on what unit your home will need.

  • Why Would My Air Conditioner Stop Working?

    Breakdown of your home A/C unit can stem from many different things, from an electrical issue to the compressor being misaligned or broken. Luckily for you, the team at John Stevenson Plumbing, Heating & Air is trained in diagnosing the problem and presenting you with a competitive price to fix or replace and install your new A/C unit.

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  • Based In Carlsbad, Serving a Wide Area
    2748 Loker Avenue West Carlsbad, CA 92010
    [Map & Directions]
  • Providing Service 6 Days a Week
    • Monday - Saturday

      8:00 AM- 7:00 PM

    • Sundays


  • Call Us 24/7 To Request Your Service

A Homeowner’s Best Friend

Expertise isn’t the only thing we have gained over the past three decades - check our our loyal customer base!
  • “I can't say enough great things about Patrick and the whole John Stevenson company.”

    - Holly G.
  • “Great job, the technicians explained everything so that I could make the best decision for my home.”

    - Victoria J.
  • “I have been using John Stevenson’s services for about 7 years now and am really happy with all the services provided so far: new heater installation and yearly checkup/tune-up; new tankless water heater installation and yearly flush.”

    - Flavia P.
  • “The thing about John Stevenson Plumbing is that it is simply the best company of its type in the region. The technicians are smart, personable, always courteous and helpful, knowledgeable and fun to get to know. They do their jobs on time and on budget and”

    - John H.
  • “Luis was great! Fixed a leak in a gas line to our Guest House. Work was done quickly and professionally with excellent communication to me about the process.”

    - Pam L.
  • “I have used John Stevenson numerous times over the past few years for both plumbing and heating issues.”

    - Phyllis S.