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.
The DCR of an inductor is measured using DC current. DC current is fed into the inductor and then the resistance can be calculated from the voltage and current in the circuit using R=V/I. The DCR is meant to be minimized in the design of an inductor, meaning it is designed to be kept low. Inductors are not made to block DC signals, so they should have a low DCR. The DCR value in a datasheet is specified as a maximum rating, meaning the value specified in the datasheet is the maximum resistance that it will contain.