AirEffect climate control system for large diameter HVLS (high velocity, low speed) fans is said to eliminate the need to constantly monitor and adjust the fans’ speed and direction in response to temperature fluctuations. The system measures temperature and humidity at two points, calculates the heat index, and identifies the best operating speed and direction for each fan. The user selects a desired temperature range, and as the indoor temperature rises, fans will automatically run in the forward direction at the best speed. When temperature drops, fans automatically run in reverse to redistribute heated air overhead, reportedly eliminating hot and cold spots without generating a discernable breeze. System components include a controller for as many as 30 fans with, zoning possible; two sensors per zone; and software.