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McMaster Heating & Air Conditioning

Award-Winning HVAC Company Serving Mission Viejo, CA Since 1996

Mission Viejo’s Experts in Heating & Air Conditioning Services

McMaster Heating & Air is a licensed, full-service heating and air conditioning company that proudly serves Mission Viejo and surrounding areas. We are committed to providing local area homeowners, businesses, contractors, and property managers with the best value in heating and air conditioning installation, replacement, repair, and maintenance services. We also specialize in indoor air quality solutions, ventilation, ductless mini-split systems, home performance testing, energy efficiency upgrades, and HVAC retrofitting for tenant improvements & remodels.

Since 1996, we have met the heating and cooling needs of thousands of satisfied customers in and near Mission Viejo. They have come to know us for our exceptional quality workmanship, honest business practices, and commitment to customer satisfaction. As a testament to the quality of our work, we have earned an A+ rating with the Better Business Bureau and excellent online reviews.

Call McMaster today to tell us about your HVAC needs! We offer heating and air conditioning service throughout Mission Viejo Monday through Friday, 8:00 a.m. to 5:00 p.m., Saturday 9:00 a.m. to 2:00 p.m., and keep a service technician on call 24/7 for after-hours emergencies.

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Reasons to Choose McMaster Heating & Air

Carrier Factory Authorized Dealer in Orange County Award-Winning Carrier Factory Authorized Dealer
Dedicated to Complete Customer Satisfaction 1,000s of Satisfied Customers
Locally Owned HVAC Company Since 1996 Locally-Owned, Licensed HVAC Company
We Employee NATE Certified Technicians We Employ NATE-Certified Technicians
Energy Efficiency Experts Efficiency Rating Guaranteed for All New Installs
Comprehensive 30-Point Inspection with Every Tune-Up Solutions Customized for Each Client’s Unique Needs & Budget
Expert HVAC Service & Repair Company Expert Service and Repair for All Makes & Models
Fast HVAC Service Within 24 Hours Fast Response Times - Often Within 24 Hours
Save Money with Special Offers & Rebates Up to Date with All Available HVAC-Related Rebates
Industry-Leading Parts & Labor Warranties Industry-Leading Warranties for New Installs & Repairs

Licensed & Experienced Commercial HVAC Contractor
Near Mission Viejo

Our owner, Ron McMaster, has over four decades of experience in industrial and commercial heating and air conditioning services. With his expertise and our team of highly trained, NATE-certified technicians, McMaster Heating & Air is qualified to meet the HVAC needs of a broad range of commercial and industrial properties, including warehouses, churches, schools, manufacturing plants, industrial facilities, retail stores, offices, and more. Our specialties include the following:

  • HVAC System Design & Installation, including AHRI Efficiency Certificate
  • Ventilation System Design & Installation
  • Air Purification System Installation
  • HVAC Equipment Replacement & Repairs
  • HVAC Retrofitting for Tenant Improvements & Remodels
  • Custom Fan Coil Unit Installation
  • Sheet Metal Ducting Design & Installation
  • HVAC System Maintenance - Biannually, Quarterly, Monthly
  • Ductless Mini-Split Design & Installation, Repair & Maintenance

Learn More About Our Commercial HVAC Services

Energy-Efficient Carrier Air Conditioning & Heating Systems Installed in Mission Viejo Homes by Factory Trained Technicians

As a trusted, award-winning Carrier Factory Authorized Dealer, McMaster Heating & Air Conditioning and its factory-trained installation experts excel at residential air conditioning and heating installations, replacements, and system upgrades. We provide professional installation of Carrier’s complete line of air conditioners, heat pumps, furnaces, ductless mini-split systems, thermostats, air purification products & ventilation systems. When we are designing a new HVAC system, we always take a holistic, whole-home approach based on a thorough inspection and accurate load calculation. Once we’re done, we issue an AHRI Efficiency Certificate to verify the exact efficiency rating of your system.

Our goal is to achieve maximum indoor comfort and energy efficiency at the best cost savings for you.

If you’re ready to begin your residential HVAC project, give us a call today. We offer free on-site estimates for new installations anywhere in Mission Viejo and can guide you through available rebates and financing options. We’ll also back your new investment with a 100% customer satisfaction guarantee for one year and a 10-year parts limited warranty.

Additionally, to show how much we appreciate our customers who choose us as their heating and air conditioning installation contractor, we automatically consider them preferred customers. Our preferred customers always get priority repair service. In most cases, we’re able to get to them the same day or within 24 hours.

Carrier’s Indoor Air Purifiers, Filtration Systems

Indoor Air Quality Solutions from Carrier

We are proud to be Mission Viejo’s indoor air quality specialists and are highly knowledgeable of whole house or spot ventilation systems, air filtration systems, and air purifiers like Carrier’s Infinity™ Air Purifier® DGAPA (MERV 15).

One of the most effective air purifiers on the market today, the Infinity DGAPA Air Purifier works silently with your HVAC system to make the air you breathe healthier. It uses Captures & Kills™ technology to trap up to 95% of particles such as pollen, animal dander, bacteria, and other pollutants.

View Carrier Product Catalog

Fast, Dependable Air Conditioner & Furnace Repair Throughout Mission Viejo

At McMaster Heating & Air, we are dedicated to providing fast, reliable heating and air conditioning repair services to our Mission Viejo clients. With NATE-certified service techs, state-of-the-art diagnostic tools, well-stocked service vehicles, and a large local inventory of replacement parts, we’re well-qualified to accurately diagnose, repair, and maintain nearly all major makes and models of furnaces, air conditioners, mini-splits, heat pumps, rooftop units, and commercial systems (up to 40 tons). We will always take the time to discuss our findings with you and provide honest recommendations so that you can make an informed decision based on your circumstances and your budget. Give us a call today. We’re available Monday through Friday, from 8 am to 5 pm, and we have techs on standby to address after-hours emergencies.

Ask About Our HVAC Tune-Ups and Preventative Maintenance Agreements for Mission Viejo Homeowners and Businesses

McMaster Heating & Air offers 30-point inspections and tune-ups for all furnace and air conditioner brands, including but not limited to Carrier, Bryant, Rheem, York, American Standard, Fujitsu, Trane, Mitsubishi Electric, Daikin, Goodman, and Lennox. For the best value in heating and air conditioning preventative maintenance services, we encourage our Mission Viejo customers to consider joining our cost-effective preventative maintenance program. Available to residential and commercial clients, our maintenance agreements are fully customized to the specific make and model of HVAC equipment in your home or business. For example, we typically recommend biannual tune-ups for homeowners–one visit in the spring and another in the fall. Meanwhile, a commercial system that is used 365 days a year might require quarterly or monthly maintenance to run reliably, efficiently, and safely year-round.

Avoid the costs and inconvenience of a system failure, and call McMaster Heating & Air today.

Whole-Home HVAC System Performance Testing in Mission Viejo, CA

McMaster Heating & Air also offers whole-home performance testing to assess if your HVAC system is performing optimally. This service includes energy-efficiency testing, acoustical and airflow testing, and air cleaner testing. With our in-depth performance testing, we’re able to identify and address any issues with your hvac system before they develop into more costly problems.

Call Today to Schedule an Appointment

Special Offers & Rebates

Click Here to View All Available Offers & Rebates

Customer Reviews

McMaster Heating & Air Conditioning Customer Lobby Reviews

McMaster Heating & Air Conditioning

4.9 Star Rated Customer Lobby Reviews 4.9 Stars - Based on 69 User Reviews
McMaster Heating & Air Conditioning Google Reviews

McMaster Heating & Air Conditioning

Google 4.9 Star Rating Reviews 4.9 Stars - Based on 49 User Reviews
McMaster Heating & Air Conditioning Yelp Reviews

McMaster Heating & Air Conditioning

4.9 Star Average Rating Yelp 4.5 Stars - Based on 57 User Reviews


I have used McMaster for years. I have never had a single issue. The entire staff from owner to installation team has been professional and kind. Often preventing unneeded services that other companies indicated I needed thus saving me money. There are no upselling techniques or pressure to buy. You tell them what you need and they provide the great common sense service. Its pretty simple. They are the only ones I trust with my heating and cooling. I would highly recommend them for any heating and cooling job, big or small. Great service and great staff! Thanks McMaster!

Michael S., Mission Viejo, CA Via Yelp Testimonial


I had a heat pump installed for my rental condo in Laguna Hills. McMaster does top notch installation workmanship with quality Carrier equipment at a good price. This system is quite an upgrade over my previous hvac system.

Ray D., Mission Viejo, CA Via Yelp Testimonial


McMaster Air not only saved me over $1500 on my pervious bid to replace my air conditioning unit and furnace but they were also professional, timely, courteous and extremely clean and tidy. I have referred them to two friends already and my units were installed last week! They are great!

Gina K., Mission Viejo, CA Via McMaster Heating & Air Conditioning Customer Lobby Reviews

Click Here to Read More Reviews

Factory Authorized Carrier Dealer - McMaster Heating and Air Conditioning Carrier Certified Health Air Expert NATE Certified HVAC Technicians NCI National Comfort Institute, Inc. Ozone-Friendly Puron Refrigerant TECH Clean California Energy Solutions

McMaster is the only dealer in Orange County to receive
the prestigious Carrier President's Award 10 times

  • 2010 Carrier President's Award Winner 2010
  • 2011 Carrier President's Award Winner 2011
  • 2012 Carrier President's Award Winner 2012
  • 2013 Carrier President's Award Winner 2013
  • 2014 Carrier President's Award Winner 2014
  • 2015 Carrier President's Award Winner 2015
  • 2016 Carrier President's Award Winner 2016
  • 2017 Carrier President's Award Winner 2017
  • 2019 Carrier President's Award Winner 2019
  • 2020 Carrier President's Award Winner 2020


Proudly Serving All of Orange County

  • Aliso Viejo
  • Anaheim
  • Brea
  • Buena Park
  • Costa Mesa
  • Coto De Caza
  • Cypress
  • Dana Point
  • Dove Canyon
  • Foothill Ranch
  • Fountain Valley
  • San Juan Capistrano
  • Santa Ana
  • Seal Beach
  • Southern California
  • South Orange County
  • Stanton
  • Tustin
  • Villa Park
  • Westminster
  • Yorba Linda
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