The “Greenest Fans on Earth” Go Solar MacroAir Technologies introduces the first and only solar  High Volume Low Speed (HVLS) Industrial Fan Solar energy has been called the wave of the future. MacroAir Technologies, a company founded on the very principal of innovation, is surfing that wave with the introduction of the MacroVoltaic fan. Receiving the highest certified rating, the MacroVoltaic fan is the only solar high volume low speed (HVLS) industrial fan on the market.