Carroll Mechanical Services

Carroll Mechanical Services has served Longmont and surrounding communities for more than 25 years, earning a 4.8-star rating across 77 verified reviews. This locally-rooted HVAC contractor operates Monday through Friday from 8 AM to 4 PM, providing residential and commercial heating and cooling solutions. The company proudly installs Carrier-brand systems while servicing all HVAC brands, and has expanded to offer plumbing and electrical services through its partnership with Welzig Heating, Air, Plumbing & Electric. Service areas include Longmont, Erie, Firestone, Frederick, Mead, Niwot, and Gunbarrel.

What distinguishes Carroll Mechanical Services is their dual focus on technical expertise and transparent customer communication. As a Carrier dealer, they provide access to premium equipment including furnaces, heat pumps, and air conditioners backed by a major manufacturer. Their service menu extends beyond traditional HVAC to include water heaters, whole-home humidifiers, gas piping, leak detection, and thermostat installations, making them a single point of contact for multiple home comfort systems. The company emphasizes that all technicians are professionally trained and licensed, with a stated commitment to thorough communication throughout every job.

Reviewers consistently name specific technicians who delivered exceptional service. Lawrence, described as "solid, skilled, courteous, and dependable," received high praise for going above and beyond on HVAC work. For plumbing needs, customers highlight Gerry the Plumber for thorough home evaluations including water quality testing, and Dominic for furnace diagnostics. One reviewer (Zeke Ross) detailed how Dominic diagnosed his 20+ year-old furnace, then Aj provided a fair quote and Dario completed a same-day Carrier furnace installation after the customer faced a scheduling crunch following a car accident. The office staff, specifically Nicki and Janis, earned recognition for working around busy schedules.