Our reliable technicians are ready when you need us!
Reliable HVAC Services in Longmont, CO
Serving homes and businesses across Colorado for over 40 years.
For over 40 years, home and business owners in Longmont, CO, have trusted SAC Mechanical for complete heating, cooling, and air quality services. We are a family-owned HVAC company dedicated to handling Colorado’s diverse climate, providing everything from expert Air Conditioning Repair and high-efficiency installation to preventative heating maintenance. Our team of NATE-certified technicians is ready with 24/7 emergency services whenever your home or business needs us most.
We partner directly with industry-leading brands like Lennox, Trane, Mitsubishi, and Carrier to deliver the best possible residential and commercial HVAC solutions. Our dedication to quality is backed by our A+ rating from the Denver/Boulder Better Business Bureau (BBB). When you choose SAC Mechanical, you’re choosing a local partner committed to your comfort and satisfaction year-round.
Need residential or commercial HVAC services in Longmont, CO?
Experience the difference with our expert team. To schedule your appointment, contact SAC Mechanical today.
Why Choose Us for Heating & Cooling Services in Longmont?
We know you have many options for Longmont HVAC companies. Our 40+ years of local experience and commitment to excellence provide the proven trust signals that matter most:
- Proven Expertise: We are a NATE-certified team, meaning our technicians have demonstrated advanced, industry-leading knowledge, and we maintain an A+ rating from the Denver/Boulder Better Business Bureau.
- Local Availability: We are based in Longmont and offer 24/7 Emergency Services for immediate repairs, minimizing your downtime and protecting your property from damage.
- Service Excellence: We take a customer-focused approach, customizing every service plan—from seasonal HVAC tune-ups to complex commercial cooling maintenance—to fit your unique needs and budget.
- 40+ years of local HVAC expertise
- NATE-certified technicians
- Trusted brands: Lennox, Trane, Mitsubishi, Carrier
- A+ BBB-rated family-owned business
- Fast emergency service, 24/7 availability
- Customer-focused approach with tailored solutions
Explore Our HVAC Services in Longmont, CO
We proudly serve Longmont neighborhoods, including Boulder, Firestone, and surrounding Boulder County communities. Whether you need residential AC repair or commercial HVAC installation, our local technicians know the area, climate, and home designs—ensuring optimal comfort and performance.
Air Conditioning
Heating
Indoor Air Quality
Longmont HVAC Questions Answered
By SAC Mechanical Experts
Our NATE-certified technicians are trained to service, repair, and install all major HVAC brands, including Lennox, Trane, Mitsubishi, Carrier, and many others.
Regardless of which brand of HVAC system you choose, we have you covered. Our expertise allows us to provide parts and service for any make or model.
Yes. We offer emergency HVAC services to homes and businesses across the state of Colorado, including Longmont. Our technicians are available 24/7 to respond to urgent service calls, so you’re never without heating or cooling when you need it most.
Indoor air quality solutions, including air purifiers, humidifiers, dehumidifiers, and advanced filtration systems, improve the air you breathe in a variety of ways. They can reduce allergens, remove pollutants, and create a healthier indoor environment for you and your family.
Regular maintenance extends the lifespan of your HVAC system, improves its energy efficiency, and prevents unexpected breakdowns. We recommend servicing your HVAC system yearly for optimal performance.
- HVAC maintenance twice per year:
- A furnace tune-up in the fall
- AC tune-up in the spring.
This preventative service ensures maximum efficiency, prevents unexpected breakdowns, and protects your system’s warranty. To keep your system running smoothly, schedule regular maintenance with our team.
Indoor Air Quality (IAQ) solutions, such as whole-home air purifiers and humidifiers, reduce allergens, dust, and viruses inside your home.
In Longmont’s dry climate, humidifiers also protect wood furnishings and improve respiratory health.
The cost of a new furnace installation varies significantly based on the unit’s efficiency rating (AFUE), size, and complexity.
We offer free, no-obligation quotes in Longmont after a complete home assessment to provide an accurate and transparent price.
Trusted HVAC Experts Serving Longmont, CO & Surrounding Communities
From Sunset and Niwot to Firestone and Boulder County, SAC Mechanical knows the homes and businesses in our area. We understand local weather challenges—from Longmont’s hot summers to winter heating demands—and tailor our AC, heating, and indoor air quality solutions accordingly.
Our technicians aren’t just certified—they’re part of the community, ready to provide fast, reliable service when you need it most.
Emergency HVAC Services in Longmont, CO
HVAC emergencies can’t wait. Our 24/7 certified technicians are available for fast AC or heating repairs, ensuring your home or business stays comfortable no matter the hour. Call for immediate service.
What Our Customers Are Saying
We’re Ready to Serve You!
If you’re in need of residential or commercial HVAC services in Longmont, CO, or the surrounding area, look no further than SAC Mechanical. We offer heating, cooling, and air quality solutions for every need and budget. Our team is ready to serve you 24/7. Contact us today to schedule an appointment!