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Some Commonly Asked Questions About Ductless or Split Air Conditioning Systems

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A split air conditioning system, or ductless system, is not hooked up through the ducts of your home but is vented directly out a wall. This system is generally more powerful than a window air conditioner but easier to install than a central unit, often making it more affordable than installing central air while offering more comfort than a window unit. If you're thinking of a ductless or split system air conditioner, note a few questions you might have and discuss these with a contractor if needed.

1. Can the system be used for interior spaces with no outside walls?

Air conditioners need a place for the vent itself, which is why even portable or window units need to be placed along a windowsill. If you want to place the split system in an office or other such interior space that doesn't have an outside wall, you may be able to route the vent to a large area attached, such as a commercial garage or warehouse. However, for other interior spaces, you need to route the vent to the split system to an outside area.

2. Can split systems provide heat?

A reverse cycle split system can provide heat as well as air conditioning. This unit may have an electric heat strip as well as an evaporator coil that houses refrigerant. In turn, they can run air over either the refrigerant before sending it back into a space or over the heat strip, so that you can have cooled or warmed air in your home with the same unit. Note that they don't all work this way, so be sure you purchase one that provides heat as well as cooling if this is your preference.

3. Why can't a homeowner install a split system on their own?

A split system may have a fan and other unit that is no bigger than a window air conditioner, but it's much more complicated to install than a window unit. You need to have the right tubing for drainage and also need to connect it to your home's wiring, as it doesn't simply plug into the wall. The unit also needs to be charged with right amount of refrigerant, as too much can overload the unit and too little can mean no cool air. Because the installation is more complicated than you may realize, it's best if you leave this to a professional.


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