Overview for Mitsubishi SLP-15AAUWThe Mr. Slim series from Mitsubishi Electric heating and cooling systems are a convenient, single or multi room solution for homes or offices that formerly relied on electric baseboard heaters in the winter and window air conditioning units in the summer. The Mitsubishi SLP-15AAUW is a Ceiling Cassette Grille For Mitsubishi Ceilling Cassette Units. Mitsubishi is known worldwide for making some of the highest quality mini split air conditioners on the market, and their accessories are of no less quality. Any homeowner looking for long lasting repair or replacement parts will never go wrong buying authentic Mitsubishi branded materials. Ductless heating and cooling systems have been around for over 30 years and are used widely throughout the world.