Fifteen. Throw out plastic bag with aged wax donut ring. For the people of you who like to smell kids' hair, Tend not to try to eat this type of donut. Also, the unit is massive and could not fit in a similar Area that the standard hot water heater https://www.tumblr.com/precisioncons/769378461398777856/trex-composite-decking-in-san-diego?source=share