52. TYPICAL INSTALLATIONSVH0053Only one outside connection is needed whenusing the Tandem® transition* and the dualoutside port*, simplifying the installation. Thesetwo components are included in the installationkit no. 15273 (purchase separately).NOTES: 1. See Point 2.3MOUNTINGCONSIDERATIONS on next pagefor required joists opening.2. The installation kit no. 15273 is notavailable in the U.S.A.*Patented.If the unit is installed in the attic, this unit mustalways be in operation during the winter season.Use the installation kit no. EA20130 (purchaseseparately).NOTE: The installation kit no. EA20130 is notavailable in the U.S.A.2.1 BASEMENT INSTALLATIONVH00042.2 ATTIC INSTALLATIONUse the following illustrations as guidelines to help you decide where your unit will beinstalled. The unit should be hung to the joists, using chains and springs (included). Ifneeded, this unit can be installed upside down. For more details, see Point 3.INSTALLTHE UNIT.In every case, bathroom fan and a range hood should be used to exhaust stale air. Also,for homes with more than one level, we recommend one exhaust register at the highestlevel.NOTE: An electrical outlet (standard 3-prong grounding outlet) has to be available within3 feet from the unit.