Mr. Heater Big Buddy Portable Indoor Propane Heater

Catalog Item # 34073

Perfect for staying warm indoors the Mr. Heater Big Buddy Portable Indoor Propane Heater combines safety with high-performing and adjustable warmth.

The single control start knob lets you light the unit with a simple push and rotation while the built-in Piezo sparking mechanism takes care of the rest. Additionally the knob lets you switch between the 3 output settings: 4000 BTU/hour (low) 9000 (medium) or 18000 (high). This adjustable 4000 - 18000 BTU/hr output offers up to a 450 sq. ft. area of heated coverage making the Big Buddy perfect for heating up enclosed spaces like a cabin. Integrated fan blends radiant and convection-style heat so you get the best of both worlds and an increased heating capacity (operates on 4 x D batteries or AC adapter not included). Ensuring years of safe and comfortable indoor heating the Big Buddy features an Oxygen Depletion Sensor (ODS) and accidental tip-over safety shut-off. For operating power the unit connects to two 1 lb. cylinders with the 2 swivel regulators (1 on the left and the other on the right side of the unit) or to a 20 lb. cylinder with optional hose and filter (not included)*. Furthermore a Quick Connect fitting on the left side of the unit can connect to a remote gas supply with a single hose and filter (not included)**.

Note from manufacturer:

  • Propane tanks larger than 1 lb. must be kept outdoors
  • Hose + Filter Combos for Connecting to Larger Cylinder
  • Hose F273701 + Fuel Filter F273699
  • Hose F273702 + Fuel Filter F273699
  • Hose F298802 + Fuel Filter F273699
  • Hose F273704 (fuel filter not required)
  • **Single Hose & Filters for Connecting to Remote Gas Supply
  • F271802: connects to Quick Connect fitting at heater and to 3/8" female flare connection on a regulated 11" water column propane source (fuel filter not required)
  • F271803 connects to Quick Connect fitting at heater and to bulk tank up to 40 lbs. (no fuel filter required)


  • 3 BTU settings: 4000 9000 & 18000 BTU/Hour
  • Up to 450 sq. ft. area of heated coverage
  • Powered by two 1 lb. propane cylinders
  • Can use remote gas source & tanks up to 40 lbs.
  • Oxygen Depletion Sensor & tip-over safety shut-off

  • Technical Specifications

    17 lbs.
    19"L x 12"W.

    Camper's Choice Rating

    Reviewer rating of 5 stars based on 10 reviews (5 Based on 10 Reviews)

    Add A Review

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

    Need portable heat - this is the answer

    by Ron Jenkins – February 10, 2007
    5 out of 5 stars

    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 t

    Toasty Warm with the Big Buddy

    by Scott – March 04, 2008
    5 out of 5 stars

    We had to travel to Ohio this winter. The temperatures reached 7 degrees, yet we were toasty warm with the Big Buddy Heater. I

    works great in class A

    by Datawoman – December 14, 2007
    5 out of 5 stars

    We have two big buddies set up while fixing our suburban 42,000 btu furnace. I actually like the big buddies BETTER because the

    Money well spent

    by Diana – January 20, 2008
    5 out of 5 stars

    I've temporarily relocated for work. It's winter in New England and my Suburban furnace died. I was using an electric heater b

    Get it for $99 at Northern Tool or Cabelas

    by Anonymous – January 29, 2008
    5 out of 5 stars

    Get it for $99 at Northern Tool or Cabelas

    by Anonymous – December 09, 2015
    This heater is model#F274800. F274825 was the CA model that was discontinued when the Big Buddy Heater was updated to be California approved instead of having a separate CA model. Now, this heater is only restricted from sales in Massachusetts and Canada. The Canada and MA approved unit, F274865, is listed as #66756.
    by Camping World – December 10, 2015
    by Anonymous – November 10, 2015
    Replacement parts can be ordered directly from Mr.Heater's Interactive Parts System.
    by Camping World – January 08, 2016
    by Anonymous – September 16, 2015
    This uses optional A/C Adapter Or 4 D-Cell Batteries To Power Blower Fan.
    by Camping World – September 24, 2015

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