Mini-Split Air Conditioning Systems





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Published on Jun 15, 2012

A ductless mini-split air conditioning system includes an indoor evaporator unit connected to an outdoor condenser by a refrigerant line set. These systems eliminate noise, wiring, and ductwork from the living space and present an alternative to window-mounted units and ducted central air systems.

Mini-split systems can be installed in single-zone or multi-zone applications. Single-zone systems consist of one indoor unit and one outdoor condenser. Multi-zone systems still use a single outdoor condenser, but are made up of two to four indoor units that act independently.

Wall-mounted indoor units, which are the most common, come with mounting brackets and a wireless remote control. Ceiling models come in several styles including suspended, recessed and concealed.

You will need a refrigerant line-set for each indoor unit that you install. Line-sets connect indoor and outdoor units, running cooled R410-A refrigerant. Most mini-split units are pre-charged with enough refrigerant for 25-foot runs. Longer distances require additional refrigerant.

Be sure to hire a licensed HVAC installer to maintain a valid warranty and ensure proper system operation. Mini-splits look simple but they require highly-technical installations, including electrical work to hard-wire the outdoor unit to a dedicated circuit breaker. Indoor units receive their power from the condenser using properly sized connecting cables and need no indoor plugs or wires.

We also offer heat pump mini-split units that can provide heating as well as cooling, but are generally not capable of serving as the sole heat source. Treat them more as a backup source of heat.

PexSupply's convenient mini-split calculator will help you select the appropriate units for your application based on factors including climate, square footage, and insulation quality.

For more information on HVAC products, visit PexSupply.com or email us with any questions.


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