Boat Engine Compartment Heater | 600w Marine Certified Bilge Heater, Boat Heater for Winter Storage, Under RV Heater, Freeze Protection Heater, Well House Heater, Use for Campers, Greenhouses, & Boats

Our RV garage in winter is typically 47 degrees of above. We store our 21’ boat in garage and this year we did not winterize it assuming the temperature would remain above freezing.Prior to going on a weeks vacation I checked the garage temperature gave and it was at 35 degrees with the temperature dropping. I checked the boat’s engine compartment and the engine was right around 34 degrees. I wrapped the engine in a large blanket and put a floor radiant heater on the floor near the engine and outdrive area.My wife did a quick search on Amazon and we found this heater. Amazon delivered it in two days, just in time as the deep freeze hit. I set it up in a safe spot in the engine compartment and plugged it in. I disconnected the portable heater. OMG, the temperature in the engine compartment came up to 60 degrees in about 2 hours. I checked on it for the next two days prior to leaving on vacation and it was keeping the engine compartment at 55-60 degrees.The outside temperatures during the following two days were a low of 14 and high of 24. The heater did its job as designed. I just checked it after 1 week and the green light is back on and the heater off. The temperature in the engine compartment is a comfortable 60 degrees. Note, our temperatures in winter seldom get into the 20’s and usually are mid thirties and above. I would never have suspected our RV garage to dip as cold as it did. After living here since 2003, I was surprised at this extreme weather pattern.This product is excellent. It’s rugged, easy to set up and durable. I know this heater saved my boat engine from freezing. Money well spent.

I researched for quite some time to determine what is the best heater to keep our water compartment in our RV warm during extreme cold. I chose this heater because of the videos on it. We used it for the first time in Utah and Denver with nights that dipped down to 13 degrees F and it worked flawlessly!!!! Kept the compartment warm and never had any pipe issues. Amazing! It is super high quality and draws 400w.

Bought this to put in my bilge for the winter to keep the engine block warm during freezing weather. Has worked as advertised for past few months, keeps everything warm, seems safe. A little pricey, but from the research I did, you get what you pay for and I didn't want to be cheap when it came to putting a very hot device on my boat unsupervised.

This product has high reviews for a number of reasons. First, our boat, 25 ft. Sea Ray is docked during the winter in our boat house in North Texas. We do enjoy using our boat during nice winter weather and prefer not to winterize our boat. This product is placed in the engine compartment to keep the cooling water in the engine from freezing. The heater turns on automatically when the temperature is below 40 deg F and maintains the compartment temperature high enough to prevent engine and bilge compartment. The heater is safe to use in a closed compartment where fuel vapors may be present. We do add fuel stabilizer in the winter and trim down our out drive to drain the water from the lower unit to prevent freeze damage. Very satisfied with the product which pays for itself in a year compared to on dock boat winterization services. The heater must have a continuous 110 V electrical supply to function. Very satisfied with this high quality marine grade heater.

This is a preliminary review of the Xtreme Small 400w Heater.It is being installed in the back compartment of our RV that houses the incoming water line, fresh water tank & pump. During winter months I’ve suspected that the compartment doesn’t stay warm enough to keep the water line from freezing overnight. Even though it’s insulated fairly well it still gets cold during 20 degrees and below weather. The heater appears to be a good solution for keeping this area warm and protecting the water line. The unit is well built and small enough to fit most places. After the initial installation and turning it on the fan sounded like a jet ramping up. I decided to open it up and replace the fan. The front / rear panels are held in place with pop rivets. Effective but cheesy. I drilled out the 6 rivets on the rear panel to access the fan. It was held in place by four screws. I purchased a Coolerguys 80x80x38mm 115V Bare Wire High Speed EC Fan that fit perfectly. Instead of using pop rivets to reattach the rear panel I tapped the holes with a #6 thread and used button head Allen screws with a drop of locktite.After getting it installed in the RV and turning it on with the new fan I couldhardly even it hear it.Overall the unit is robustly made but seems overpriced for what itis. The obnoxiously loud fan and the pop rivets certainly are disappointing.Once the winter sets in and the opportunity to see how it performsan updated review will be added.

Operates as advertised.

We use an 800 watt version of this heater in the basement of our camper. It protects 140 gallons of water tanks and 1200ah of lithium batteries for us - all winter long - automatically.We live in the mountains of Colorado and use the rig on weekends. We used to have to winterize on Sunday and then de-winterize the next Friday when we headed out again. Now we come home, plug in the rig and the Xtreme heater keeps everything warm and ready to go automatically for us. No more winterizing!I've reached out to the company with some technical questions. They answered within an hour of me emailing them and were very thorough and helpful in answering all of my questions over several emails. A big thumbs up!

Great product! I would highly recommend this product!

Time will tell, if it last 4,5 years and my pipes don't Freeze . It would be an Excellent Product. Not shure if worth the $800.00 for an Electric heater ??? Really.Only 4 star cause it so dam expensive