Heating & Cooling

reliable comfort specialists

Dedicated to Service

How we came to be

Thousands of hours of study, training, and practice results in a skill set that makes all the difference. Our Founder John McDowell served as a paramedic fire Captain for more than three decades. When he wasn't managing a fire crew, assessing situations or diagnosing patients in medical emergencies, he was rearing a family of 6 sons, as well as building dozens of homes.  His work ethic and passion for quality in details he passed on to the next generation.  Since 1995 JMAC has been focused on the HVAC industry, bringing our expertise across the Valley of the Sun as well as across the USA.