Ellis Air Systems, Inc. located in Killeen, Texas, is an old-fashioned, family owned and operated A/C repair company whose number one priority is YOU. Each department at Ellis Air is headed by a family member, so whichever service you require, you can rest assured that customer service is a priority. Ellis Air Systems, Inc. has been servicing and installing air conditioners since 1988 and has installed more R410a A/C systems than any other contractor in the area. To say we have experience is an understatement.