This is another type of HVAC unit. Furnace HVAC use fuel that is fed through an onsite storage tank that requires regular replenishing by a utility company, supply lines or fuel supplier.

Unlike most AC motors in the market, DC motors are capable to control speed above/below the rated levels. For example, the DC shunt motors are easy to vary the speed safely. This means that they can be used on a wide range of applications. This makes them ideal for producers who need to vary production rates during different shifts or seasons.