A+++++++++++++++++++This family-owned & operated establishment is, by far, the best furnace company in Ohio! The expert service and advice is awesome. Teri & Angie, office staff/owners, are very knowledgable, as well as accommodating of service emergencies. After living in Columbus for 40 years, there's no comparison to other companies I have had previously. Michael, the ace technician, was able to brilliantly diagnose and correct a furnace problem I have struggled with for years! I am one happy customer and will recommend Air Supply to everyone.