Gilmer Chamber JF Maxwell Heating & Air Sub ContractorsHome Repairs & Improvment JF Maxwell Heating & Air Visit Website Request Info View Trip Ellijay, GA 30540 (706) 487-8300 Facebook About Map About Heating and cooling state licensed contractor since 1994. Serving the North Georgia area. We follow all state of Georgia codes regarding our industry. What's Nearby? Distance: 5 10 15 20 25 50 mi.