it seems i'm stuck at the choices for a placement of a fahrenheit furnace in the basement. it's my ideal furnace add-on and looks like i'm forced on the following exhaust piping scenerio. t-pipe to 6-7ft rise then elbow to about 8ft horizontal with some rise at every foot and then i'm outside and t-pipe to whatever vertical needed(6-7ft) to clear the filling and venting pipes of the oil tank at a safe distance. i was leaning on a selkirk DT piping. do i forget about such installation or go ahead knowing i will probably have to clean the pipes more frequently. finished basements can such headaches at times.