Customer Support We can be reached at the following phone numbers, e-mail address, or mailing address listed below during Monday - Friday 7:00 a.m. - 4:00 p.m. CST. Customers are our number one priority. Technical support is also available during this time. Mailing Address: ACi 500 Industrial Blvd. Grapevine, Texas 76051 Main Phone Number 972-316-8900 Toll Free Number 1-866-9MAXAIR (962-9247) Main Fax Number 972-316-8937 Customer Service Direct Fax: 972-316-8936 General Questions or Comments E-mail: Contact Us Terri Scott, Customer Support • Phone: 972-316-8916 • Email: terri.scott@4s.com Dave Perry, Sales Manager • Phone: 972-316-8905 • Email: dave.perry@4s.com