M and M Heating, Cooling, Plumbing and Electrical

M and M Heating, Cooling, Plumbing and Electrical has earned a near-perfect 4.9-star average from more than 32,000 reviews, anchoring its reputation across the Front Range of Colorado from its Longmont base. The company operates around the clock every day of the year, covering residential and commercial work across four trades under a single roof: heating and cooling, plumbing, electrical, and insulation. Whether a homeowner in Longmont, Boulder, Lafayette, or Firestone needs a furnace repair in January or a summer AC installation, one call reaches a team equipped to handle the full scope of the job.

What sets this contractor apart is a workmanship guarantee that removes post-installation anxiety: every new unit qualifies for the One Year Test Drive, meaning the equipment is covered for the full first year after installation. The company pairs that confidence with flexible financing options, making full-system replacements more accessible when aging equipment demands a larger budget. Their indoor air quality lineup includes GPS ionization technology, a step beyond standard filtration, and their specialties extend into radiant floor heating, snow and ice melt systems, and commercial HVAC, a breadth that most single-trade contractors cannot match without a referral network.

Karl Moeller illustrates the scale M and M can bring to a single project: when he inherited a house with failing HVAC, water heater, and basement electrical that was not up to code, the company sent HVAC and electrical crews the same day. Multiple vans arrived early, eight technicians completed HVAC replacement, a new combi-boiler installation, and a full electrical bring-up to code in a single day. Alison Mosher experienced the emergency response firsthand when both water heaters failed on the same day; M and M inspected immediately and scheduled the earliest tankless replacement, with a team that communicated throughout the process.