Self-contained air-cooled ducted systems typically have more installation options and flexibility. The unit itself may be situated up to 25 duct feet from the cellar. It can be ducted on the evaporator (cold) side only, the condenser (warm) side only, or both sides. Multi-function air handlers fall into this same ducted category and offer an even greater range of capabilities and cooling power. Where lack of condenser-side space and/or fan noise are concerns, water-cooled ducted units may be the answer. With only flush-mounted air supply/return grills showing inside the cellar, aesthetic concerns are addressed.