Big Buddy Portable Heater is the most popular indoor-safe propane heater in North America, trusted for decades to deliver dependable radiant heat. Using patented heating technology, this portable heater produces selectable heat outputs of 4,000, 9,000, or 18,000 BTU per hour. As a result, it works perfectly for cabins, workshops, garages, hunting blinds, and emergency heat applications.

Designed for convenience, the heater connects directly to two 1 lb. propane cylinders and heats spaces up to 450 square feet for as long as 11 hours on low. In addition, dual swivel regulators allow connection to a remote propane supply when paired with an optional hose and filter, providing extended runtime and flexibility.

Starting the unit takes only seconds. Simply push and rotate the control knob, and the built-in Piezo ignition lights the heater without matches. For safety, the Oxygen Depletion Sensor (ODS) automatically shuts the heater off if oxygen levels drop too low. Furthermore, an accidental tip-over shut-off helps prevent unsafe operation.

Whether you need reliable heat during power outages or portable warmth for off-grid use, Big Buddy Portable Heater delivers proven safety, powerful performance, and long-lasting comfort in a compact, trusted design.

⚠️ Use of unauthorized accessories or attachments is strictly prohibited and may cause serious injury or void the manufacturer’s warranty.

Specifications

• Heat output: 4,000 / 9,000 / 18,000 BTU per hour
• Fuel type: Liquid propane
• Heating coverage: Up to 450 sq. ft.
• Runtime: Up to 11 hours on low with dual 1 lb. cylinders
• Ignition system: Built-in Piezo spark
• Control type: Single control start knob
• Heat settings: High / Medium / Low
• Regulators: Dual swivel regulators
• Safety systems:
  • Oxygen Depletion Sensor (ODS)
  • Accidental tip-over shut-off
• Fuel connections:
  • Two 1 lb. propane cylinders
  • 20 lb. propane tank with optional hose and filter
• Indoor-safe radiant heat design
• Classic RED Mr. Heater® Buddy housing

Is the Big Buddy Portable Heater safe for indoor use?

Yes. The Big Buddy Portable Heater is indoor safe and includes an Oxygen Depletion Sensor (ODS) that automatically shuts the unit off if oxygen levels become unsafe.

How long does the Big Buddy heater run on propane?

When connected to two 1 lb. propane cylinders, the heater can run for up to 11 hours on the low setting, depending on conditions and usage.

Can the Big Buddy Portable Heater connect to a 20 lb. propane tank?

Yes. The heater can connect to a 20 lb. propane cylinder using an optional hose and filter, which allows for extended run time.

For additional specifications and manufacturer details, visit the

official Mr. Heater® website