Heating, ventilation, and air conditioning systems' air supply used to be ... The device that controls the fan speed is called a variable speed drive. Variable frequency drives are also used on pumps ...

This high-end, portable air conditioner has a dual-hose design for efficient cooling. Pros: The dual-hose design effectively ...

Speed Today, air conditioners are available with a thermostat and multiple speed options allowing you to achieve variable fan speed and swing. It is worth considering the speed factor before ...