The Warmth of Commitment, The Chill of Excellence


For over three decades,M and M Heating, AC, Plumbing & Electrical has been more than a service provider. We’ve been a beacon of warmth during the coldest winter nights in Longmont, Dacono, Frederick, Firestone, Mead, Erie, & Johnstown, CO. We’ve been the wise friend homeowners turn to in times of trouble, diagnosing critical heater installations, furnace repairs, and plumbing repairs, without breaking a sweat.

Exceptional Furnace Service with a Personal Touch

From checking thermostat performance to maintaining indoor air quality, our furnace service experts perform every task like it’s their own home. When homeowners in Longmont and surrounding areas need furnace replacement, they know they can trust in our seamless service, quality products, and commitment to energy efficiency.

The Promise of Heater Installation Perfection

But it’s not just the quality of our heating service and furnace repair that sets us apart. It’s the relationships we’ve formed throughout the years. Ensuring a family’s comfort for a lifetime, we provide the highest standard in heater installation that uniquely merges efficiency with vital warmth.

Your comfort is our team’s mission, but your satisfaction is our ultimate goal. Experience the M and M Difference in furnace service, furnace repair, and heater installation.