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Big Buddy Heater

Catalog Item # 34073
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Safe for indoor use, this clean-burning, odor-free propane heater is a great alternative to kerosene for emergency or auxiliary heat.
Big Buddy heats up to 400 square feet for up to 220 hours on low. Dual heating system combines radiant heat comfort with convection heat airflow for maximum heating efficiency. Powerful built-in fan spreads heat evenly. Convenient push-button piezo ignition lights without matches. A heavy-duty wire safety guard and shock-absorbing floating insulation protect the ceramic burner tiles and porcelain-coated reflector. Safety features include automatic low oxygen shut-off and accidental tip-over shut-off. Swing-out cylinder mount makes installing disposable propane cylinders easy. Non-skid pads for extra stability.

Special Features:
  • Ergonomic Easy-Carry Handle
  • Low Oxygen Shutoff Pilot Safety System For Indoor & Outdoor Use
  • Blower Fan Power On/Off Switch
  • Uses optional A/C Adapter Or 4 D-Cell Batteries To Power Blower Fan
  • Large 4-Position Heat Level Control Knob With Built-In Piezo Starter
  • Integrated Hot Air Blower Venting System
  • Attached Swing-Open Doors with Swivel-Out Mount For Easy Cylinder Installation
  • Porcelain Coated Reflector For Extended Life
  • Dual Ceramic Burner Tiles With Shock Absorbing Floating Insulation
  • High-Temperature Coated Safety Wire Guard
  • Non-Skid Surface Pads For Extra Stability
  • Key Shaped Rear Mounting Holes For Wall Mounting
  • Built-In Tip Over Shutoff Switch
  • CSA Certified For Indoor & Outdoor Use
Temporary Heat For:
  • Barns/Sheds
  • Cabins/Shelters
  • Workshops/Worksites
  • Porches/Patios/Decks
  • Garages/Storage Buildings
  • Picnics/Tailgate Parties
  • Sporting Events
  • Hunting Blinds
  • Ice Fishing Shanties
  • Truck & Horse Trailers
  • Emergency Heat
This item qualifies for Product Protection coverage! Protect Your Investment! Product Protection eliminates out-of-pocket expenses and protects against costly product repairs or replacement. We’ll cover 100% parts and labor for up to two years following the expiration of your manufacturer’s warranty. Warranty service is available at any Camping World SuperCenter.

Technical Specs

Tech Specs

Weight: 17 lbs.

Warranty: 1 year limited warranty.

Manufacturer: Mr Heater Corp

Mfg Part #: F274825/F274800/895

Tech Notes: Produces up to 18,000 Btu/hour on High; 9000 Btu/hour on Medium; 4000 Btu/hour on Low.
Uses two 1 lb. disposable propane cylinders or two 20 lb. refillable cylinders with optional extension hose (all sold separately).
Fan operates on 4 D batteries (sold separately).
The 20-lb. tanks should be placed outside the heated area.
CSA certified for indoor or outdoor use.
Use free-standing or wall mounted, at altitudes below 7000 feet.
17"L x 10"W x 17 1/2"H.
Prohibited for Sale and Delivery in the state of Massachusets.

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Big Buddy Heater: Customer Reviews

Camper's Choice Rating

(5 Based on 10 Reviews)

Good Heat (1)
Quiet (1)
Compact Size (1)
Very reliable (1)
Eats batteries (1)

Reviewed by 10 customers


Need portable heat - this is the answer

534 out of 835 people found this review helpful.
February 10, 2007
We dry camp in the Smoky Mountains in our Coleman popup in fall and early spring and you always need heat. With no utilities in their camp grounds this was the answer for us. Lots of heat when needed and can also just knock off the chill. Use the bulk propane tank as it will go through the small bottles quickly on high. I like the battery powered fan as well. It also has an optional AC adapter for the fan. Bottom line, lots of heat, low cost and great for emergency heat anywhere, anytime.
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works great in class A

182 out of 298 people found this review helpful.
December 14, 2007
We have two big buddies set up while fixing our suburban 42,000 btu furnace. I actually like the big buddies BETTER because there is no noise, they are very efficient, and use radiant heat. The hose hook- ups work great (must be the specific hose--don't buy the wrong ones twice like we did). You can go on just the little bottles, but be sure to buy a mr heater propane adapter to use your big bottles to fill your little bottles. Enjoy!!!
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Money well spent

146 out of 244 people found this review helpful.
January 20, 2008
I've temporarily relocated for work. It's winter in New England and my Suburban furnace died. I was using an electric heater but it was very inadequate. I bought Big Buddy and I have been warm since. It heats my 26' easily on Med, I haven't used High yet. It is 65 inside and 9 outside right now. The Big Buddy is easy to use and safe. This was money well spent.
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Get it for $99 at Northern Tool or Cabelas

0 out of 0 people found this review helpful.
January 29, 2008
Get it for $99 at Northern Tool or Cabelas
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Toasty Warm with the Big Buddy

55 out of 92 people found this review helpful.
March 04, 2008
We had to travel to Ohio this winter. The temperatures reached 7 degrees, yet we were toasty warm with the Big Buddy Heater. It worked like a charm. We had it hooked up with the adapters to a regular size tank and didn't have to deal with frequent changes of propane bottles. We especially liked the 'fan' feature which kept our motor home warm even during an ice storm. The safety features are great and give you great peace of mind. Most of all... THEY WORK. We tried to move it slightly to adjust it... and the unit turned off immediately. Our family members in Ohio are going to purchase one for their garage. We highly recommend this unit.
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A winner- but could be better

0 out of 1 people found this review helpful.
October 07, 2011
This is a marriage saver! It heats our poor man's RV converted cargo trailer easily on low setting and my wife loves it. BUT - This unit could be made much better with the following improvements: 1) Redesign the 6 volt power to 12 volts to allow a direct connection to RV power; 2) Add an optional thermostat controller (would be expensive but I would be willing to pay for it) - 3) Add a push button (or better yet, electronic auto-spark) for the piezo ignitor and redesign the gas control valve - the pilot ignitor twist-knob system is confusing for newbies and the instructions are not sufficiently clear on how to start the pilot light - and the knob movement is sloppy and requires jiggling to work properly. 4) Should have a CO alarm built-in for added safety (I bought one at Home Depot for 10 bucks). If you accept the above limitations, this unit will satisfy your small RV occasional use heating requirements. It's not meant to take the place of a commercial quality heating unit, after all, and it's nice to be able to use the small propane bottles and not need to install a big propane tank system for just occasional use.
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Works Great

5 out of 5 people found this review helpful.
January 02, 2011
I have used this in my pop-up camper when camping at or below freezing. Had a propane company modify one of the Mr Heater hoses so i could connect it to my stove quick connect inside the camper. I have only used it above low a couple of times, usually when coming back to a camper aroundfreezing to warm it up. I would advise getting the adapter for the fan because it eats the batteries if you use it. I have found it helps the air flow. It also doubles as my emergency home heater if the power goes out for an extended period of time when very very cold. I have a Carbon Monoxide detector in both home and camper and the catalytic heat has never set it off. It was well worth the money I paid and was a cheaper choice than installing a furnace for those few times I need a heater in the camper and the heat strip in the AC unit is unable to do the job.
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Great little heater

0 out of 0 people found this review helpful.
January 19, 2013
Purchased this heater to supplement main heater for faster warm up in winter months. Unit works great and have also used it as a stand alone heater. Would of been 5 stars but the disposable cans don't last very long. We have been using a 20 lb bottle (get the filter and power adapter too while purchasing the hose) and it alone has kept our 36' fifth wheel warm all night with outside temps in the teens. As with any propane appliance make sure the RV Co2 and propane detectors are functioning properly.
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Great Heater for The Price

0 out of 0 people found this review helpful.
October 19, 2013
This heater works EXACTLY as intended! I purchased it to go in my office, and it heats up the area around it quite quickly, and had no trouble keeping up with people opening and closing doors all day. I made a video review over at, and I was really impressed at the quality for the price. You won't go wrong with this heater!
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Excellent extreme cold RV undercarriage heater!

0 out of 0 people found this review helpful.
August 02, 2015
I use this to heat the entire underside of my 35' 5th wheel when temps drop below freezing. I am a full time RV'r living in Montana where winter temps drop to NEG 40 at times. My RV is skirted entirely during winter. I place the heater below the king pin and feed it with a 40# propane cylinder. I place a small electric fan behind and above the heater to push the hot air under the entire RV bottom. The 40# can will last 10 days when heater on low. Another plus is it keeps things dry underneath and stops condensation from occurring. This heater keeps everything toasty warm underneath and the entire interior comfortable with less need for furnace. It has cut my winter heating propane cost dramatically!
Pros: Compact Size , Quiet , Good Heat , Very reliable
Cons: Eats batteries
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Q & A

Product Question & Answer

8 questions : 8 answers
Expand All
Is this Model #F274825?
1 answer(s)
Can I buy a replacement control knob?
1 answer(s)
1 answer(s)
1 answer(s)
Can this be battery operated instead of plugging into an electrical outlet?
1 answer(s)
Can it use 20lb propane tank?
1 answer(s)
1 answer(s)
Can this heater be fitted with a quick connect to work with RV propane tanks?
1 answer(s)

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