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Award-Winning Ductless Mini-Split HVAC Company Serving Orange County Since 1996

Locally Owned HVAC Company Since 1996

Orange County's Trusted HVAC Company Since 1996

Tenant Improvements & Efficiency Retrofits

Ideal for Room Additions, Multi-Tenant Buildings & More

Air Conditioning Preventative Maintenance Experts

Experts in Mini-Split Installation, Repair & Maintenance

Service All HVAC Makes & Models

We Service Carrier, Fujitsu, Mitsubishi, LG & Samsung

Save Money with Special Offers & Rebates

Manufacturer & Utility Rebates Available

Free Estimates for New Installations

Free On-Site Estimates for New Installations

Orange County's Best Value in Ductless Mini-Split A/C System Sales, Design, Installation, Repair & Maintenance Services

McMaster Heating & Air Conditioning offers the best value in ductless mini-split air conditioner services to Mission Viejo, Irvine, Laguna Niguel, and surrounding areas. As a local, family-owned and operated HVAC company serving Orange County since 1996, we are trusted by thousands of satisfied residential, commercial, and industrial clients and have earned numerous positive online reviews for our exceptional workmanship, extensive industry knowledge, and dedicated customer service.

Energy-Efficient Heating & Cooling Systems For Server Rooms, Room Additions, Detached Offices, Garages & More

We have over 40 years of experience designing, installing, repairing, and servicing energy-efficient ductless mini-split systems for Orange County homes and businesses. Because ductless mini-splits deliver heating and cooling directly to an intended area and offer separate temperature control, they are a popular HVAC solution for server rooms, multi-tenant buildings, and other commercial and industrial applications. They are also ideal for use in residential spaces where ductwork is difficult to install, such as detached offices, garages, sunrooms, and room additions. For Carrier mini-split system installations, we offer their 10-year limited parts warranty, along with a five-year labor warranty. When you have your mini-split system installed by McMaster Heating & Air Conditioning, we also provide an AHRI Efficiency Certificate and exact efficiency rating for your specific combination of HVAC equipment.

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Customer Reviews


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

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I had an excellent experience to rebuild a new heating and airconditioning system in my house. Contract, installation, repair service and management of McMaster had been done in professional way without any trouble. I really appreciate their job!

Tae Won Oh Via Google Review

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Regular Preventative Maintenance To Keep Your Ductless Mini-Split System Performing at Its Best

Though mini-split systems are well known for their cost-effectiveness and high efficiency ratings, they also require regular maintenance to remain operating in optimal condition. For example, it's extremely important to flush and clean the coils and blower wheels on an annual basis to prevent build-up on essential components, which could lead to decreased function and poor indoor air quality. McMaster Heating & Air offers thorough maintenance services designed to keep your system performing at its best. Our preventative maintenance service for ductless mini-split systems includes inspecting, cleaning, and testing your system's safety controls, moving parts, thermostat, and electrical connections. If we notice any problems, we will let you know immediately and recommend a reliable, cost-effective repair solution.

Reliable Mini-Split System Repair Services From
Experienced HVAC Professionals

At McMaster Heating & Air Conditioning, our factory-trained NATE-certified service technicians have years of industry experience. They are experts in the service and repair of all makes and models of mini-split and ductless air conditioning systems, including Carrier, Fujitsu, Mitsubishi, Samsung, LG, and more. Because we always use the industry's best practices, state-of-the-art diagnostic tools and equipment, and high-quality replacement parts, you can rest assured that every repair will be completed to the highest standards. Our service technicians can be relied upon to arrive on time, in uniform, and always show the utmost respect and care for your home and property.

Call Today to Schedule an On-Site Estimate or HVAC Maintenance Service Call in Irvine, Newport Beach, Mission Viejo & Surrounding Cities

When you call McMaster Heating & Air Conditioning, you will receive access to a dedicated team of HVAC professionals who go out of their way to provide superior service to every client. We will listen closely to your concerns and heating and cooling needs, then provide expert advice on choosing the best HVAC installation, repair, or maintenance service for your situation. For clients in or near Irvine, Newport Beach, Mission Viejo, Rancho Santa Margarita, and surrounding areas, we offer free on-site consultations on new installations and replacements.

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

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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