blowhardfans.com Super Vac The Super Vac 718b is a variable-speed, battery- powered, 18-inch PPV fan with a run time of up to 30 minutes by way of a lithium/ion 24-volt battery.

I like the hardware ability to set fan speed to keep the fan speed as low as temps permit. I'll probably go with one 100mm in and one 120mm exhaust in the old but serviceable Antec Solo.

I know it's the Intelligent 120mm variable speed fan kicking in, assuming that it detects a high temperature level which needs then to be cooled down with extra fan pull.

In most fan systems a single fan is selected for the required system design rating. Various methods of control are employed such as dampers, variable inlet vanes, variable pitch blades, or variable ...

The new rooftop exhaust fans are variable-speed, energy-efficient models equipped with speed and constant pressure controls, helping to reduce energy costs and increase tenant safety.

The lower limit of 500 fpm is to allow the use of variable-speed exhaust systems and reuse of older systems that were designed for larger cfm exhaust rates than are needed today. A kitchen may have ...

A variable air volume box controls the air flow to a given space. When the space is unoccupied, the box closes off the heat and cooling to a minimum flow or turns it off when a building is not being ...

This paper presents a discussion of the development of a viscous fan clutch with continuous linear variable speed control function for engine cooling system to reduce cooling fan noise and improve the ...