600 Watt Xtreme heater gives me great piece of mind

"I bought a 600 watt Xtreme heater a couple of weeks ago after speaking with you. It’s mounted in the engine compartment of my 2017 Rinker 370EX, 37 foot with twin Mercruisers 8.2L, located on Old Hickory Lake in the Nashville, TN area.
This is a graph of the outside temperature (yellow) and inside the engine compartment (blue line). Knowing my bilge is being kept at 40 - 50 F regardless of the outside temperature gives me great piece of mind.
Thanks
Al Wagner

winterized boating