When there is no threshold (barrier), the length of the drain hose should not exceed 3m. When it is necessary to connect the drain hose with the drain outlet located far away, connect the extension hose and applicable parts (available from dealers or service centers). Do not install the drain hose where it must extend over a threshold of 5cm or more; do not install where there is a threshold (as shown below) and the hose must extend for more than 2m.