Gravity-drain optimization is the internal design of the drain pan that ensures every drop of water flows out without pooling, even if the unit is slightly off-level. The Bravo Milano 24,000 BTU Universal Floor/Ceiling features a dual-sloped pan to support both floor and ceiling mounting. This is a key safety detail in our Multi-Zone systems to prevent stagnant water and mold growth. Our Installation Kits include a high-grade flexible drain hose that can be easily routed through Line Set Covers. For installations where a gravity drain isn't possible, we suggest browsing our Accessories for external condensate pumps. Proper drainage is the most overlooked part of a DIY install, which is why we've made our pans as forgiving as possible. It ensures your system remains hygienic and odor-free for years to come.