A New System is Within Your Reach

Save $4500 on an Energy Efficient Replacement System. FINANCING AVAILABLE up to 15 years on approved credit.

McMaster offers the best option for your home and wallet.
*Requires minimum standard/improvements for Energy Upgrade California Program. Call for full details.

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Orange County Heating and Air Conditioning Service

Established in 1996, McMaster Heating and Air Conditioning is Orange County’s top choice for reliable heating and air conditioning services at an affordable price, and with high value/ Our licensed and insured contractors are helpful, friendly and knowledgeable, and work directly for you the customer to offer the best solutions, honest evaluations, and affordable options.

Don’t Wait A Second Longer. Call Our HVAC Repair Team Today

We Proudly Service the Following Local Communities:
Laguna Hills | Mission Viejo | Yorba Linda | Laguna Niguel | Lake Forest | Newport Beach | Orange Santa Ana | Huntington Beach | Irvine | Aliso Viejo | San Juan Capistrano | Rancho Santa Margarita Corona Del Mar | Costa Mesa | Coto De Caza | Foothill Ranch | Ladera Ranch | Trabuco Canyon

deal-img-pa_logoMcMaster Air Conditioning has Received the Carrier President’s Award
Five (5) Years Running

Carrier Air Conditioning Contractor

What Makes McMaster your #1 Choice for Home Comfort:

  • Proven Results – Highest Energy Savings
  • Engineered Approach – No Guessing
  • Accurate Equipment and Duct Sizing with ACCA Load Calculations
  • Home Leakage Testing & Sealing
  • Create Healthier Indoor Air Quality
  • Qualified Contractor for all Rebate and Tax Incentive Programs
  • Duct Leakage Testing & Sealing
  • A Partner for Life – Established in the Community


Mission Statement
Our mission is to perform the highest level of service and quality workmanship for our customers. We will establish long lasting relationships with our customers by exceeding their expectations and by gaining their trust through exceptional performance by every member of our company. Our pledge is to maintain the highest levels of integrity and honesty with our vendors, professional associates and customers. Our technicians work directly for the customer to bring the best HVAC solutions that make send to our beloved clients.


Before You Call

Is your air conditioning and heating system on the fritz? Would a new system’s cost savings outweigh the cost of repairing your existing equipment? Read our helpful tips to find out the best option for you.



Our customers are what keep us striving for the best. We look to provide the best service to build relationships that last. Want to hear it first hand? Read our real customer reviews, or share your own experience! We can’t wait to hear from you.


Internet Special

Free thermostat upgrade to Carrier Touch WiFi Thermostat with any Carrier Infinity equipment install. Call today to get yours!