About Treadwell Mechanical - Heating & Cooling in DeWitt, MI
Where HVAC Expertise Meets DeWitt Community Care
When you need heating, cooling, or water-heating solutions in DeWitt, you deserve a team that understands both the equipment and the community. Treadwell Mechanical - Heating & Cooling brings local HVAC expertise to your home or business with dependable service built on honest recommendations and clear communication.
We're a locally established specialist serving DeWitt and the Greater Lansing area, and our work reflects the values that matter most: reliability, transparency, and customer-first care.
Every system we service, repair, or install is handled with the same attention to detail and long-lasting workmanship you'd expect from a neighbor you trust.

Discover how our team can keep your space comfortable year-round with responsive, professional HVAC service.
Established to Serve DeWitt and Greater Lansing with HVAC You Can Count On
Our roots are here in DeWitt, and we've built our reputation by serving homeowners, renters, and small businesses throughout the surrounding towns. We understand Michigan weather—the frigid January mornings, the humid summer nights, and everything in between—and we know what it takes to keep your heating and cooling systems running efficiently through it all.

From the tree-lined neighborhoods near Herbison Woods to the newer builds along Old US-27, we've worked with a wide range of system types and building layouts. That local familiarity helps us recommend the right solutions for your unique needs, whether it's a furnace repair before the first freeze or an energy-efficient upgrade to lower your utility bills.
We're proud to support homeowners and businesses across DeWitt, helping our community thrive with comfort and peace of mind.
Learn more about the Treadwell Mechanical difference and how we can help you.
Licensed Technicians Guided by Honesty and Quality Workmanship
Our licensed and trained technicians bring real experience with Michigan's demanding climate and the full spectrum of HVAC systems. Every job is approached with punctuality, transparency, and a commitment to doing it right the first time. You won't find pressure tactics or unnecessary upsells—just straightforward advice and quality care reflected in the reviews and trust we've earned throughout the community.
- Licensed technicians experienced with Michigan heating and cooling demands
- Honest recommendations and transparent communication on every service call
- Energy-efficient upgrades tailored to DeWitt homes and local climate conditions
- Responsive service that respects your time and your comfort
- Proven track record with homeowners, renters, and small businesses across Greater Lansing
Contact Treadwell Mechanical today to schedule your heating, cooling, or water-heating service. You'll experience the care and craftsmanship that keeps DeWitt comfortable, one system at a time. Reach out now and let's get started.