LG PTAC units are an economical way to cool and/or heat your rooms. Whether assessing construction costs, maintenance costs, or operating costs, PTACs allow for the flexibility to control energy expenses room-by-room, rather than building-by-building. If you need service or maintenance, the units easily slide out of the sleeves and can be replaced simply by sliding in a new unit. The dual air filters are front-loaded for easy cleaning, and can be interchanged left or right. LG was among the first manufacturers to include a cross-flow fan for quiet operation, and continues to add innovative improvements to maximize your investment and control your energy use.