Approximately 150 sound‐power‐level tests have been conducted of unitary and room air‐conditioning equipment at Kodaras Acoustical Laboratories (KAL). This paper submits a complete description of the reverberation rooms used in conducting the tests as well as information regarding the temperature‐ and humidity‐control systems, room noise levels with and without the control systems operating, and the measurement instrumentation used at KAL. In addition, problems encountered in selecting microphone locations, loading the test specimens, dealing with pure tones and other every day practical problems and their solutions are discussed. Future changes that will be made to this facility as a result of our experience will be presented.