Window-mounted AC units represent the largest category of portable AC appliances. Other portable AC units are designed as floor models that can be placed inside a room. Window-mounted AC units are designed to fit in the bottom half of a double-hung window. This type of portable air conditioner is designed to cool the room where it's installed. Units are rated according to BTU output, from 5000-10,000BTUs. Easy to install, but not as convenient as central AC Installing a window-mounted AC unit is a fairly straightforward process that most homeowners can accomplish on their own. With the window's bottom sash lifted open, the AC unit is placed in the opening so that the unit's bottom edge rests on the window sill. The bottom sash is lowered against the top of the unit so that the mounting flange rests against the sash; then the adjustable side panels are extended to fit against the side jambs of the window frame. A window-mounted air conditioner offers an affordable and immediate solution to a room that gets too hot.

But most homeowners prefer central air conditioning systems over the use of multiple portable AC units for a number of reasons. First of all, window-mounted air conditioners are much noisier than a central AC system. Installing a window-mounted AC unit limits the view out the window and detracts from the home's exterior appearance. central ac units indiaThe window is inoperable as long as the unit is installed, so there's no opportunity to take advantage of natural ventilation (which requires no electricity) on mild days. moving a ac unitFinally, these units need to be removed and stored during winter months, then reinstalled when warm weather arrives; how to cover ac unit outsideit's a task that no homeowner looks forward to. For homeowners who are interested in upgrading to central air conditioning but find the cost too prohibitive, a ductless mini-split air conditioning system is a very attractive alternative.