AHRI-260 sound power data for ducted VRF fan coil units

This presentation will highlight the steps that have been taken to qualify a reverberation room to accurately measure inlet, discharge, and casing radiated sound power in accordance with AHRI-260. The setups for measuring inlet, discharge, and casing radiated sound power will be presented along with sample test results for each. Many VRF manufacturers are currently publishing sound pressure level data for ducted fan coil units measured at only one location in an anechoic chamber. However, data collected at one location in an anechoic chamber cannot be used to accurately predict sound levels in a real room. This presentation will show a comparison of the two methods and explain why AHRI-260 measured data are preferred.