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2 Year Warranty
Satisfaction Guaranteed
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Compact /Flexible
Easily mount or release with no tools
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Reliable
Even in harsh environments
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Safety
Exceeds Coast Guards, ABYZ and Military Specification rating Certified and Independently Tested now with the UL 1278 standard
TESTIMONIALS
Xtreme Heaters In My 370 Sundancer
I use two Xtreme heaters in my 370 Sundancer to protect it from potential freeze damage during the winter months. The Xtreme heaters are always reliable and have never let me down. I rest assured that my boat is safe using Xtreme products. – David Bowers
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Peace Of Mind
My Xtreme Heater gives me the peace of mind to know that my investment is safe during those cold winter months. Installation was simple and the pre-programmed heat settings were perfect for my environment. Quality construction and a great overall value. Count me as a very satisfied Xtreme Heater owner. -Sam Baker
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Our 50 Princess Fly Bridge In The Water All Year
We keep our 50 Princess Fly Bridge in the water all year. We use it all year as long as the water doesn’t freeze–winter boating is actually pretty nice on the Chesapeake Bay. Without our Xtreme Heaters keeping the engines warm and the cabin livable, it would be a whole different story. -MK
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RV For Lake Tahoe
We could not be happier with our purchase. We love the “set it and forget it” setup. When the van is home we simply plug in the heater and open a few cabinets and it maintains a perfect temp above freezing. When we are ready to adventure we unplug it and off we go. It does not get any simpler. Thanks for a great product Steve. - Greg & Lourdes
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My name is Lt. Joe Crowshaw; I work for the City of East Providence Fire Department (EPFD) in Rhode Island. I was responsible for the purchase of all of the deck gear and firefighting equipment to be used aboard the boats. I can honestly say that there is no other product available that comes close to the Xtreme Heaters performance, safety and economy of operation. - Lt. Joe Crowshaw
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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.Al Wagner![]()
Steve with Xtreme
Heaters is great! Be confident in his product and the service
you’ll receive with it.
Thanks again Steve – You’ve created a lifelong customer in
me!Blane![]()
Our Story
The Xtreme Marine Engine Compartment Heater was developed to provide a safe and consistently reliable solution to protect your boat’s engines and critical components from freeze damage. Whether part of your overall boat winterization strategy, or a way to extend your boating season in colder months, Xtreme’s boat engine heater is key. Our customer testimonials demonstrate the level of satisfaction our products have brought to boaters in the US and around the world.
XTREME HEATERS BLOG
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Let customers speak for us
I used the medium heater for a mid-sized (and moderately insulated) engine compartment, and it successfully kept the engine and components from freezing, even during -10 degree F cold snaps. Incredible! I did not want to winterize the engine and fresh water system and not be able to use the boat all winter, so this was a perfect solution. Very well built and reliable. Buy the mount too -- allows for easy removal for spring, or easier installation overall if you're leaving in in permanently.
Pro tip -- if your dock power isn't entirely reliable and you're using the unit as described (to protect an unwinterized engine), I would encourage the installation of a power or temperature monitor. For us, the combo of Victron Cerbo (with temp sensor), BMV 712 battery monitor and 4G LTE Modem (cheap IOT sim card) give us remote alarms when the dock power is lost. I haven't seen temps in the engine room below the mid 40's with the heater installed -- usually hovering at about 48 degrees F.
I moved from California to NC 14yrs ago. I live on a lake and every year I would stow our boat in our garage for the winter. Well, I decided to leave the boat in our covered dock on the lift. I researched boat heaters and came across these Xtream heaters. I put a remote temperature probe in the engine compartment to register the temp. This heater works great, well worth the money spent, I couldn’t be happier. I had a separate Circuit line installed just for this heater to illuminate any electrical problems. If your looking for a boat heater, look no further, these Xtreme heaters perform like the manufacture states. Thank you for manufacturing a quality, reliable product.
We liked it so much we ended up buying another one for the boat one for main cabin and one for bedroom. In addition to being super quiet and compact it’s offers freeze protection while we are away during the week. With temps dropping we thought it would be good to have one in the main living area as the leather folds into a bed but the leather is very cold for the kids to sleep on.
We liked it so much we ended up buying another one for the boat one for main cabin and one for bedroom. In addition to being super quiet and compact it’s offers freeze protection while we are away during the week. With temps dropping we thought it would be good to have one in the main living area as the leather folds into a bed but the leather is very cold for the kids to sleep on.
We liked it so much we ended up buying another one for the boat one for main cabin and one for bedroom. In addition to being super quiet and compact it’s offers freeze protection while we are away during the week. With temps dropping we thought it would be good to have one in the main living area as the leather folds into a bed but the leather is very cold for the kids to sleep on.
Works great
Works great
Works great
It is exactly what we expected!
It is exactly what we expected!
It is exactly what we expected!
Great purchase. Plug and play. Winterization cost me $600.00The heater cost $480.00.Do the math. Very good.
Great purchase. Plug and play. Winterization cost me $600.00The heater cost $480.00.Do the math. Very good.
Great purchase. Plug and play. Winterization cost me $600.00The heater cost $480.00.Do the math. Very good.
Looks like a great product.