High Velocity Central Air Conditioning

System Components

• High-velocity systems use a special air handler indoors to deliver cool air. They are compact and inconspicuous units that can fit inside a closet or attic space with ease. The outdoor unit is similar to a conventional central air system, with a metal cabinet that houses the condenser. You also have the option to install a high-velocity system with a heat pump instead of a conventional compressor and condenser unit. Lines run from the outdoor equipment to the indoor equipment delivering the refrigerant to cool the air over coils, and the thermostat regulates the indoor temperature -- just the same as with a regular central air system.

Aspiration Cooling Method

• These systems use a method called aspiration to circulate cool air. The cool air is vented into rooms at a high rate of speed from strategic locations and angles, such as from corners and different points on walls. The speed of the air, which is typically about 2,000 feet per second, creates conditions for the vented cool air to mix with the existing air inside of the room to make the room cooler, drier and more comfortable.

Benefits and Advantages

• You get the same benefits of whole home cooling and central air conditioning with a high-velocity system. This means you can eliminate noisy window and single-room air conditioners and use a system that runs quietly and efficiently. The ductwork that is required is about the size of a CD -- far less than the amount of space needed with a traditional system. High-velocity air conditioners work well for humid climates because they remove up to 30 percent more moisture and humidity than conventional central air conditioning systems. And they only require one return vent to draw air from the house instead of one return vent for every room.

Downsides and Disadvantages

• Some might view the advantage of the high speed as a disadvantage because of the rate of airflow. You will notice a stronger air current with a high-velocity system in comparison to a traditional air conditioning system. The speed will also be a bit noisier than a regular system, but less noisy than a window or wall unit. However, manufacturers are continually making improvements on the units to insulate and deaden the sound. Test out different models from various manufacturers, if noise level is a concern.