Air Conditioning

Full Service A/C Contractors. Repair, Replacement, Maintenance, and more…


Full Service Heating and Furnace Contractors. Repair, Replacement, Maintenance, and more…


Savings, Rebates, and more! We Are Proud to Save Our Clients More Money…!

McMaster HVAC Services

McMaster Heating and Air Conditioning is not your typical Orange County HVAC company; in the years since first opening our doors in 1996, our customers learned that we have a much more whole-home focused, energy-minded, and involved approach to heating and air conditioning repair, service, installation and replacement. We see every heating and air conditioning system setup as unique and individual, with its own set of needs, shortfalls, requirements, and challenges, and we approach each individual system as such.

Not only was McMaster Heating and Air the first ever Energy Update Contractor in the Orange County, we still do it the best of any Orange County contractors. Like the focus and attention we put into each and every one of our services, we hone our attention into homeowner’s specific needs and requirements and custom-tailor our innovative solutions for maximum energy efficiency.

With our unique and detailed approach to residential, commercial, and industrial heating and air conditioning, our services are a cut above the rest, and we stand by our promise to not only deliver a 100% satisfaction guarantee, but to meet and exceed our clients’ expectations.

We Are Proud of Our Customer Service

Please take a moment to leave us a review with your experience!

McMaster Heating and Air Customer Reviews

Whole Home Performance Approach

Our Approach To Residential Heating and Air Conditioning Addresses The “Big Picture” and Eliminates Energy Waste, Right-Sizes HVAC Equipment, and Maximizes Comfort Levels

At McMaster, we strongly believe that the whole-home approach to heating and air conditioning is not only the best approach, it is the ONLY approach for true efficiency and maximized comfort. That is why a whole-home approach is our standard at McMaster Heating and Air Conditioning. We are the ONLY local company that takes all HVAC services a step further and makes sure that everything is done correctly, bench-marking load calculations, performing home leakage testing — to find where insulation is weak, and air is escaping.

Performing HVAC Services The Right Way Improves Comfort and Safety!

McMaster HVAC Carrier Authorized Dealer

Carrier Factory Authorized Dealer

High Efficiency Heating and Air Conditioning Systems, Products, and IAQ Improvement

We are a Carrier Factory Authorized Dealer! What does this mean for our Orange County Area customers? It means that we have direct from factory products, heating systems, and air conditioners, which allows us to pass on increased savings on the purchase and installation of both heating and air conditioning systems, as well as factory-exclusive rebates. This also means that our technicians have met the very rigid training and service standards set-forth by Carrier, meaning that the technicians we send to take care of your HVAC system have been trained in the latest service methods, and are fluent in the inner-workings of today’s latest HVAC technologies. View our selection of Carrier Brand products, or contact us to speak with a Carrier expert!

Carrier President’s Award Winner

Proud recipient of the Carrier President’s Award for 8 consecutive years!

McMaster Receives Carrier President's Award
McMaster BPI HVAC Dealer

We’re a BPI Certified Dealer

The Building Performance Institute provides certification programs for HVAC dealers who agree to abide by industry-leading Energy Efficiency standards. Our technicians are BPI certified, assuring that the work we do for you will keep you safe, help save energy & save you money.

Energy Upgrade California Contractor

Proud to Be The First and Longest-Running Energy Upgrade Contractor in Orange County, CA…

Giving homeowners the ability to bundle several energy-efficient home improvements into one, the Home Energy Upgrade Program is a great way for homeowners to take advantage of additional savings, while ensuring whole-home energy efficiency. Contact us to learn the specifics of this energy-friendly and money saving program.

McMaster Energy Upgrade California Dealer
Residential HVAC Services

Residential HVAC Services

Ongoing maintenance, repairs, installation and replacement; we are your full service residential air conditioning and heating contractors, keeping your home comfortable, and your HVAC system running at the highest efficiency.

  • Sales & Installation

    We help you shop for the best choice for your needs, and complete all installation to satisfaction

  • Repairs & Emergency Services

    24 Hour Repairs and Diagnostic Services.

  • Maintenance & Tune-Ups

    Scheduled & Annual maintenance, including tune-ups, cleaning, multi-point inspection and filters.

Commercial HVAC Services

Commercial HVAC Services

Whether you have an office, retail space, shop or warehouse, our commercial heating and air conditioning services provide all of your indoor air needs, from repairs and maintenance to installation and replacement.

  • Sales & Installation

    The latest in Commercial Heating and Air Conditioning Products in All Sizes.

  • Repairs & Emergency Services

    24 Hour Repairs and Diagnostic Services.

  • Maintenance & Tune-Ups

    Scheduled & Annual Maintenance For Businesses, Retail Spaces, and Other Commercial Clients.

Industrial HVAC Services

Industrial HVAC Services

Yes, we are expertly trained in servicing, repairing and installing industrial grade heating and air conditioning systems and products, and we can help with all of your industrial ventilation needs!

  • Sales & Installation

    Air Conditioning and Heating Products and Solutions for Warehouses and Light Industrial Spaces.

  • Repairs & Emergency Services

    24 Hour Repairs and Diagnostic Services for Light Industrial and Heavy Commercial-Grade Systems.

  • Maintenance & Tune-Ups

    Scheduled & Annual maintenance, including tune-ups, cleaning, multi-point inspection and filters.

Need Help?

Speak to One Of Our Expert Technicians

Why waste time? Contact us now to speak with a heating and air conditioning expert! We are here to answer all your questions, and offer unique solutions, savings, and more…

HVAC Contractors in Irvine, California

What Do Our Customers Think?

We did a tremendous amount of research when deciding to replace one of our 23 year old A/C and furnaces. We got three quotes, McMaster was the last. When we got to them, we knew we had found the company we wanted to work with. Ron was knowledgeable, professional and took the time to understand […]

Ed and Sherrie

After intensive research and obtaining several quotes, I selected McMaster Heat and Air to replace my inefficient and almost 30 year old furnace and A/C units. Everything was explained upfront and as I came up with questions during the decision-making process, my emails were answered promptly and completely. Their crew installed everything yesterday and I […]

Kristen Keeler

I highly recommend McMaster. Being from out of state, we didn’t know what company to contact. We needed two complete heating and a/c systems installed. Both Ron and James were most helpful in finding the Carrier products that suited our needs. The McMaster technicians who installed the new system were very professional and polite.

Patricia Shaker
McMaster - NATE
McMaster - Puron
McMaster - Healthy Air Expert
McMaster - NCI
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