Installed new Coleman 95 percent natural gas furnace. We remove the old unit and leveled off and mounted new furnace. We adapted mounted and screwed in supply and return duct and sealed ductwork. We wired and high and low voltage wiring. We installed gas line and checked for leaks We ran out new 2-in PVC flu piping underneath outside porch and insulated with 2 inch armor flex. We pipe in pvc drain line into existing condensate pump. We tested all functions of the unit everything's operational at this time. We need to return to install a new 2 inch fresh air intake and install ieq electronic air filter.