VTACs: Air Conditioning in a Closet

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New in the HVAC arena, the VTAC. Vertical Terminal Air Conditioner is a vertical air conditioner which optimizes floor space while leaving windows accessible. How?  It's installed in a closet with venting through an outside wall, no large unit on the floor or blocking a window. This means you increase your usable square footage while decreasing the noise level

Measuring approximately 24" x 24", VTACs are much smaller than PTACs but come in larger sized units. VTACs come in sizes of 9,000, 12,000, 18,000 and 24,000 BTU units and use a 220V line. A top air discharge controlled by a wall-mounted thermostat can be mounted into a single room or multiple rooms. Heat is provided by either Electrical Resistance Heat or as a Heat Pump Unit.

Because of the closeted installation, the use of a plenum is necessary to contain and separate the outdoor air paths, and hold water in the bottom without leaking into the wall. The plenum is the first component to be installed. Next, an installation platform is positioned against the plenum; the plenum is centered on the edge of the platform, which is then secured to the floor. After a sleeve is positioned on the platform, the air conditioner is installed. The return air from the room to the air conditioner requires either a louvered door, a wall-mounted access panel or a return air grille. An exterior grill covers the exposed side of the air conditioners.

A VTAC example, The General Electric AZ75E129DAC GE Zoneline vertical air conditioner unit offers 17,200 BTUs for cooling and 15,500 BTUs when used as a heat pump. It features the Quick Heat Recovery System, where the heat pump incorporates a two-stage heat/one-stage cooling thermostat utilizing resistant heat to bring the room temperature within 2 degrees of the thermostat set point, before the heat pump operation begins. This brings the room up to temperature quickly, allowing warmer air to be discharged through  the wall when the heat pump kicks in.

Versatile, Vertical Terminal Air Conditioners can be used in Hotels, Motels, Assisted Living Centers, Offices, Apartments, Single-Family Dwellings, Home Conversions, Residential Add-Ons, External Classrooms and more. If construction allows positioning for this type of unit, the smaller footprint of the hidden Vertical Terminal Air Conditioner might be a better choice than the much larger, exposed PTAC unit.
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