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Xtreme Heaters Large 800W XXXHEAT RV & Camper Heater

Regular price $469.00 USD

SKU: XXXHEAT-800

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  • 5-year warranty
  • Ships same day if ordered by 4 PM EST (Mon–Fri)
  • Lifetime support

About this product

Xtreme Heaters Large 800W XXXHEAT RV Heater. With its durable design, this heater will protect your assets, providing you with long-lasting warmth and comfort during your travels. Say goodbye to cold nights and hello to cozy camping with the Xtreme Heaters RV Heater. The Xtreme Heaters Large 800W XXXHEAT RV and Camper Heater is perfect for large compartments and skirted RVs. Some skirted may need to use 2 heaters depending on how airtight or low temps. Can be used in smaller compartments in Extreme cold conditions.

  • True Forced Air Heating circulates air more effectively and heats more evenly for more accurate temperature control.
  • Mounting orientation flexibility: Horizontal or vertical installation supported, even upside down.
  • Automatic Thermostat turns the heater on at 40°F and off at 55°F (+/- 3°F) for tight, reliable control.
  • Failsafe Design cannot overheat; the heating technology is dynamic and self-regulating.
  • High Efficiency produces heat faster, circulates more air, and shuts off earlier to save energy.
  • Pre-wired 15 ft marine-rated power cord with a 110V 3-prong plug for plug-and-play installation. No hardwiring required.
  • Maximum Life: Designed for durability and reliability in harsh environments.
  • Corrosion protection: Fully anodized inside and out to resist corrosion in wet and salt-air conditions.
  • Mounting hardware included: Stainless Phillips head screws.
  • Energy note: Thermostat cycling can reduce energy use up to 75% compared to continuous-run heaters.
  • Certified and independently tested.
  • IP68 rated: The assembly is sealed for rugged use—resists dust and moisture exposure in dirty, damp conditions and handles wet, harsh environments without failing.
  • Ignition protected: Tested to U.S. Coast Guard standards (USCG 33 CFR 183.410) and SAE J1171.
  • Mil-Spec tested: MIL-STD-810E Method 514.4 for vibration, humidity, and high/low temperatures.
  • 5-year warranty (best in the business), backed by U.S.-based support.
  • Built for freeze protection in compartments, enclosures, wet bays, rv skirting and utility bays.

As product and industry experts, our goal for the Xtreme Heater was to produce a highly safe, dependable, and efficient option on the market. With our heaters, you can confidently stay on the water for extended periods.

SHOP SMALL HEATER HERE ( Small camper & RV compartments )
SHOP MEDIUM HEATER HERE (camper & RV medium sized compartments)

Owners manual Click here 

Specifications

  • Wattage: 800W
  • BTU: 2729.7
  • Inrush (startup) current: 10.9A, 1 sec.
  • Typical operating current: 6.1A
  • Fan flow 58CFM
  • 69.2 Db 
  • IP68 (Waterproof) rated Fan
  • MTBF for fan: 40,000
  • Heater Dimensions: 8″ x 3.5″ x 5 1/8″
  • Box packaged Dimensions 12″ x 6″ x 6″
  • Fuse or breaker size required 20A
  • 15ft marine rated power cord
  • UPC-895670001262

Suitable for boats up to 35′ Length

Weight 5.0lbs
Dimensions 8″ x 3.5″ x 5 1/8″
  • 5 stars: 56 (92%)
  • 4 stars: 2 (3%)
  • 3 stars: 2 (3%)
  • 2 stars: 0 (0%)
  • 1 star: 1 (2%)
Some of the reviews shown are from related products the merchant grouped with this one.
T
Tony Rios
Large 800w Heater
Heater

Hello.I just want to say..I did in order in a Monday morning and I received it in Colorado the next morning..You heaters work amazing. Thank you for the products and quick ship

Thank you for the kind words Tony! We're happy you are pleased with the product. Let us know if you have any questions.

J
John Lor (United States)
2-Large 800w Heaters

2 x 800w extreme heaters, 1 heater in my engine bilge and 1 heater in my cabin which is open to wheelhouse on my 42’ northern bay. I’m seeing 40 degrees up to 55 degrees in both areas with 8 degrees weather conditions outside. She’s in the water for the winter.

Great news thanks for the updates

J
John

Only received one heater

M
Mark Buzby (United States)
Large 800w Heater
Saw this unit promoted on "Mathers on the Map" YouTube channel and decided to give it a try

Saw this unit promoted on "Mathers on the Map" YouTube channel and decided to give it a try. Has not been cold enough to place it in service yet, but compact size and rugged construction portend a warm engine room this winter.

L
Lydia L (United States)
Large 800w Heater
Great for home outdoor utility closet

I don't own a boat or RV, but I do need to keep temps above freezing in my outdoor utility closet in my condo. I have water heater and gas pipes in my utility closet. I needed a reliable heater that keeps its thermostat settings that I can just plug in and forget about. I don't want to have to keep monitoring a space that's not inside the apartment. The Large Xtreme Heater 800W is perfect for the small 2'x4'x10' closet space. Its mountability and stability without mounting was a consideration. I don't want to have to mount it until I'm sure its optimal place, but I also want it stable for peace of mind. As soon as it arrived, I just plugged it into the wall. It revved up and then the light turned green and it's good to go. Perfect. Just set it and forget it. Now I don't have to worry about pipes bursting or keep checking the temperature remotely all winter long. And honestly this Large sized heater takes up very little space, so it doesn't look cluttered in the utility closet. These Xtreme Heaters were truly a find. When I called to ask questions, Ed was patient and answered every question. He suggested the proper size I needed and never tried to sell me more than what was right for me. Xtreme knows about heaters for keeping things that shouldn't freeze from freezing in all environments. The heater itself is well made and safe. I trust Xtreme to get me through this winter and the winters to come.

W
William

Love it great heater

J
John Garner
Large 800w Heater
Haven’t actually used the product yet but it was

Haven’t actually used the product yet but it was extremely simple to install and the company itself has been awesome!

thanks so much

I
Ismael Jaso (United States)
Large 800w Heater
Haven't tried it yet but hopefully it will

Haven't tried it yet but hopefully it will work
I know if I have any questions or problem I can call
Give me till November when it gets cold and ask for a review I will be happy to do one

Hi Ismael, thank you for your positive outlook! We hope the heater works perfectly when you need it. Feel free to reach out if you have any questions—looking forward to your review in November!

S
Scott Ehlers (United States)
Large 800w Heater
2 800W heaters

I received the 2 800W heaters and did and plugged in to do the test. It all checked out as it should. The real test will be this winter in Nebraska. Using in an enclosed and insulated crawl space.

Hi Scott, we're glad to hear your heaters checked out well! Wishing you a warm and cozy winter in Nebraska. Thanks for sharing your experience!

C
Carson Ingersoll (United States)
Large 800w Heater
Incredible heater

Incredible heater, absolute work horse. Just got me through a week with wind chills reaching -15 in New Jersey.

Thank you for the review Carson. We appriate having you as a customer!

A
Anonymous (United States)
Large 800w Heater
Love them!

Love them! But recommend one heater for every 10 feet of RV underbelly if living in extreme negative temperatures! My 40 foot RV is skirted, foam board behind the skirt and insulation around the edges on the inside. At first we had only 2, we added a third and will be adding a 4th. What a difference! Currently my temps are in the mid 50’s, hoping once we add number it will be in the 60’s. And it has made a huge difference for inside the RV too. Very happy!! THANK YOU!

Thanks for good review. You may need to check your skirting make sure there are no air leaks. The more sealewd it is the better the heater will hold temps. Hot air can find a way out iwill act like chimney and suck the heate out. FYI let us know

J
Josh Fazio (United States)
Large 800w Heater
I don’t know why I just learned of these!

I don’t know why I just learned of these! I have a sprinter van converted to a camper van with a complex electrical system and a huge investment in lithium batteries! I live in Illinois where it gets cold I have added this heater and it keeps my batteries above the danger zone! These are the safest option on the market it’s truly set it and forget it and I don’t have to worry about this thing catching fire! I recommend anyone with a large investment in lithium to have one of these it’s cheap insurance!

Hi there! Thank you for sharing your experience with our Xtreme Heaters Large 800W XXXHEAT Heater. We're thrilled to hear that it's been a great addition to your converted camper van . Safety is our top priority and we're glad to hear our heater has given you peace of mind. Thank you for recommending us and for choosing our product. We appreciate your support! Feel free to add picture here

D
Dusty

5 stars works great

C
Chris Sappe (United States)
Large 800w Heater
Received order then sent email need exchange

I received my order but on of the fans is making a weird noise I sent a message online asking for an exchange of one of the two heaters I purchased but I have not heard back yet. I purchased two heaters, and I need to return one of them and get it exchanged for another one.

j
jeffery howell (United States)
Large 800w Heater
Awesome

Bought the 800 watt heater for a water well house heater, it has been awesome and saved my but once all ready when I thought it quit in freeze cold temps, but it was the breaker that I had it on that went bad instead, replaced the breaker in the panel and got the heater back on and it kept everything from freezing and busting during that whole ordeal and then ran non stop for probably 24 hours and never skipped a beat. Kept the non-insolated well house well above freezing just not warm enough to shut down for that 24 hours as everything had to thaw and warm back up, but never had a problem after all of that, 18° outside right now and 49° in the well house with a very cold wind chill of 7°. Customer service was the best I have seen in a long time, answered every question I had before I bought it and recommended what he thought I should get and gave explanations of why.

Thank you for your kind review! We are so happy to hear that our Xtreme Heater has been performing well and keeping your well house above freezing even in such extreme temperatures. It's great to know that our customer service was able to provide helpful recommendations and support. We truly appreciate your business and are grateful for your trust in our product. Thank you again for sharing your experience!

j
jesse medina (United States)
Large 800w Heater
cust support

cust support was fantastic ! i had owned a previous unit they gave me a trade-in discount.
their units are rock solid.

Hi there! Thank you so much for your kind words about our customer support team. We're thrilled to hear that we were able to provide you with fantastic service and a trade-in discount for your previous unit. We always strive to help in any way we can and we stand behind our products, no matter how old they may be. Thank you for choosing our Xtreme Heaters Large 800W XXXHEAT Heater. Stay warm and have a great day!

G
George Ames (United States)
Large 800w Heater
Poor customer service practices

The heaters seem well built but the C S department is very forgetful

R
Robert Delve (United States)
Large 800w Heater
Great heater and service

We received a new heater a few weeks ago and are using to keep our RV that is in storage safe. So far it’s working great! It’s wonderful how it turns on when needed and off when the temp gets to proper temp. So far so good!

E
Ed G (United States)
Working Great in My Well House

My "Well House" is actually a shed from a big box store. This heater keeps the whole shed above freezing, protecting the pipes and pressure tank from freezing. I tried this after multiple failures of heat tape over the years. Since I store some of my lawn equipment and gas in the shed as well, the ignition protection aspect of these heaters give me peace of mind.

L
Lawrence

This gem works really great! Super easy to use and provides a nice steady temp that keeps the batteries in their comfort zone!

E
Ed Holder (United States)
Large 800w Heater
Nice solution for 5th wheel in storage

I picked up two Xtreme heaters - an 800W and and a 600W, the small one for my 5th wheel basement and the 800W for the main living area. I live in North Alabama where we typically get half a dozen or so hard freezes (15-30 degrees). I was reluctant to go the anti-freeze and plumbing flushing process for this sort of climate, and I found the Xtreme heater option. We got our first hard freeze last night (17 degrees), and when I went to visit my camper in storage. Both heaters were whirring away. At that time it was 25 outside and 47 inside. Very pleased with my purchase.

T
TERRY L LANE (United States)
2-Large 800w Heaters

So far, the 800W heaters have done their job.

J
Jeff Hensley (United States)
Large 800w Heater
Houseboat engine room heater

I have used this for 3 years when I experienced a failure. I ordered a replacement and asked if they could repair my old one as a spare. They stood behind it and sent me a brand new unit well after the warranty expired. In today’s world it’s hard to find good products and harder to find companies willing to go above and beyond Xtreme did in my case 100%.

Hi there, thank you for your kind words and for being a loyal customer. We are glad to hear that our Xtreme Heater has been serving you well for 3 years. We are always here to help and we appreciate your support. It's our pleasure to stand behind our products and provide the best customer service possible. Thank you for choosing Xtreme Heaters!

A
Andrew

Haven’t plugged this in yet but I already feel better that my rv will not freeze this coming winter

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