Orange County Heating & 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.


100% Satisfaction Guarantee backed by Carrier HVAC Corporation

Being a factory authorized dealer for one of the largest HVAC manufacturers in the world, means that McMaster Heating & Air Conditioning not only installs the best heating and cooling equipment in the industry, but we are also fully trained by the best. It is this limitless training that allows us to take part in the industry’s best guarantee. If you are not 100% satisfied with your equipment in the first year, we will fix the issue at no charge, or remove the HVAC equipment and provide a full refund.

  • Proven Results. Highest Energy Savings.

    Using energy efficient Carrier heating and cooling equipment, combined with proper installation, McMaster is able to save you money on your utility bills.

  • Engineered Approach. No guessing.

    Taking an engineered approach means McMaster has the knowledge to properly evaluate your home, and assess its comfort needs individually.

  • Accurate Equipment and Duct Sizing.

    McMaster technicians are trained to test HVAC equipment and duct work sizing based on ACCA Load Calculations, ensuring you get the right equipment for your home.

  • Create Healthier Indoor Air Quality

    Southern California is known for poor air quality, which can create health problems indoors. With leading IAQ products from Carrier, McMaster can help you to breath easier.

  • Rebate and Tax Incentive Programs

    McMaster is a Qualified Contractor for all local, state and federal rebate and tax incentive programs, passing big savings to our customers.

  • A Partner for Life.

    McMaster Heating & Air Conditioning is well established in Orange County, and commit to being this community’s partner for the long term. We will be here when you need us.

We are waiting by for your call today!



Carrier Factory Authorized Dealer
Carrier Sig
Pres Award
Customer Lobby
Comfort Institute
Socal Edison
Energy Upgrade CA

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.

Handsome technician portrait

Customer Reviews

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! 


Internet Special

Wouldn’t it be great to control your home comfort from anywhere? Now you can with our free thermostat upgrade to Carrier Touch WiFi Thermostat, with any Carrier Infinity equipment install. Call today to get yours!