Marine Max Installed Two Xtreme Heaters to Protect this Cruiser This is a picture of my boat that we keep on lake Lanier .I had Marine Max install 2 of your large heaters in the engine room 2 years ago. They work great – Thanks for the good product. First Washington Winter coming up! The Xtreme Heater is one of the few heaters that the marina will allow us to use unattended