Detailed answer regarding Ceiling Fan Direction. During the summer, you want the air blowing directly on you so you will feel cooler from the wind chill effect (which is how fans cool you off). So stand under the fan and turn it up on high speed.
NRR STANDS FOR NOISE REDUCTION RATING. NRR (noise reduction rating) is a single number rating method which describes a hearing protection device (HPD) based on how much the overall noise level is reduced by the HPD. Most noise measurements in the industry are derived from the A-weighting scale.
1 The NRC can also be viewed as the percentage of sound waves which come into contact with the sound absorption material that are not reflected back within the space. 2  Example: NRC of .5=50%. 3  Different materials with the same NRC may provide very different results.