On The Mark is more than our name and banner…It’s our mission! We are thorough and exacting with the units we service and the customers that have put their faith in us.

– Mark Hanna
Commercial: We keep the equipment running right, so that you can keep your business running right. Keep it On The Mark.

Residential: Home comfort is key! Home heating, air conditioning, air filtration, humidification, duct zoning, energy savings and more, Keep it On The Mark.

Mark Hanna has been doing Heating / Air Conditioning / Refrigeration since 1984 in Michigan and Georgia. He has a mechanical license by the State of Michigan. Mark has a very strong mechanical background & has received his training through Lawrence Tech, Detroit Engineering Institute & Washtenaw Community College.
Since 1994, Mark Hanna, owner, has remained steadfast to his principals and business ethics. On The Mark Mechanical’s success is measured in customer satisfaction and the referrals that are given on our behalf.