Customer Reviews
Bought this to keep my RV basement warm, where I keep my lithium batteries. Thought I might need another but no way, this thing works great! Keeps the whole basement warm and helps make sure my water pipes are safe too.
Excellent performance for 11+ years! This is one reliable piece of kit. I monitor performance via a logging thermometer and even when it is negative 10 and fiercely windy the engine compartment has maintained 40 degrees Chaparral winters on a lift (out of the water) and the extremeheater handles the business. Bravo!
Over the past 16 years, I have used Xtreme heaters in my boats. First, for 14 years in a Silverton 43 Sportbridge and most recently in a Monterey 295SY. I have always felt confident that my engines & fresh water systems were safe during the winter. Great safe heater!
I've got a pair of heaters installed in the back of an F-150. Keeps all the fire/ems equipment unfrozen and ready for work as the truck has to stay outside.
They don't get too hot, they turn on automatically, what's not to love?
I have a 23.5 ft Cobra performance boat with 496 HO. I always take it out of our boat house for the winter. My wife didn’t want our boat in the garage anymore for the winter. I did my homework and ordered this Extreme 400wt heater. It performed perfectly with temps as low as the mid 20s. Last week I cleaned and cranked over my 496 and no issues, all is good. If you’re looking for a reliable heater for the winter months, look no further, Extreme has your solution.