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Deal.ai › Mr. Heater
Mr. Heater
Mr. Heater 18,000 BTU Big Buddy Pro Series Portable Propane Heater

Mr. Heater 18,000 BTU Big Buddy Pro Series Portable Propane Heater

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$251.99at routeshop shopChecked Nov 9

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Price facts

  • Last seen at $251.99 at routeshop shop on Nov 9.

Our take on the Mr. Heater 18,000 BTU Big Buddy Pro Series Portable Propane Heater

The Big Buddy Pro Series is a portable radiant propane heater that runs on two 1 lb cylinders and adjusts from 4,000 to 18,000 BTU, enough for cabins and job sites up to about 450 square feet. It is approved for indoor and outdoor use and shuts off automatically if tipped, if the pilot goes out, or if oxygen runs low. An integrated fan blends radiant and convective heat, though Mr. Heater has dropped the fan on some MH18B units. Owners like the heat output and portability; the common complaints are the cost of 1 lb cylinders and the fan noise.

Best forHeating a cabin or workshop up to 450 sq ftPower outages and emergency backup heatIce fishing shelters and garagesCampers who want radiant heat without electricity
Pros
  • Adjustable 4,000 to 18,000 BTU output
  • Approved for indoor and outdoor use
  • Auto shut-off on tip-over, pilot loss and low oxygen
  • Two swivel regulators for flexible cylinder placement
  • Fan blends radiant and convective heat
Cons
  • Propane cylinders are not included
  • Burns through 1 lb cylinders quickly on high
  • Fan noise bothers some owners
  • May shut off at altitudes above 7,000 ft
  • Some MH18B units now ship without the fan

Mr. Heater 18,000 BTU Big Buddy Pro Series Portable Propane Heater prices at every store

  • routeshop shopNew

    In stockShips from the UK · duties may applyReturn policy

    $251.99Checked Nov 9
    Visit routeshop shop

What reviewers say

Owners praise the Big Buddy for strong, steady heat and easy setup in cabins and garages. Complaints center on how fast it drains small cylinders and on fan noise.

What people mention
  • Heat outputPraisedOwners say it warms a cabin or garage quickly even on medium.
  • Fuel useCriticisedReviewers note 1 lb cylinders drain fast on high, pushing many to a bulk tank hose.
  • Fan noiseCriticisedThe integrated fan is described as noticeably loud in small rooms.
  • Safety shut-offsPraisedBuyers value the tip-over, pilot and low-oxygen shut-offs for indoor use.
  • AltitudeMixedSome mountain users report the unit shutting off above 7,000 ft.

About the Mr. Heater 18,000 BTU Big Buddy Pro Series Portable Propane Heater

The Big Buddy is a portable propane heater with a heat output of 4,000 to 18,000 BTU. It heats enclosed spaces such as cabins up to 450 square feet. It is approved for indoor and outdoor use, burns clean and is nearly 100 percent efficient.

It blends radiant heat with convection heat, using an integrated fan that increases its heating capacity. The fan has been removed on some Big Buddy (MH18B) models. A control knob sets low, medium or high heat. To light it, push and rotate the knob, and the built-in Piezo sparker does the rest.

The heater connects directly to two 1 lb. propane cylinders. Two swivel regulators let you switch to a remote gas supply by adding a single hose and filter. It shuts off automatically if it is tipped over, if the pilot light goes out, or if it detects low oxygen levels. At altitudes over 7,000 feet above sea level, the heater may shut off. Using unauthorized accessories or attachments with it is prohibited, may cause serious injury and voids the warranty.

Heat output
4,000 to 18,000 BTU
Coverage
Up to 450 sq. ft.
Fuel
Liquid propane, using two 1 lb. cylinders (not included)
Heat type
Radiant, with an integrated fan for convection heat on models that include it
Heat settings
Low, medium, high
Ignition
Push-and-rotate knob with built-in Piezo sparker
Safety
Oxygen Depletion Sensor (ODS), tip-over shut-off, pilot-out shut-off
Use
Indoor and outdoor
Max operation
220 hours
Regulators
Two swivel regulators
Altitude

Questions and answers

How much space can it heat?
Mr. Heater rates it for enclosed spaces up to about 450 square feet at its 18,000 BTU high setting. In a cold, poorly insulated space expect it to struggle past that.
Does it come with a propane tank?
No. It connects directly to two 1 lb cylinders, which are sold separately. A hose and filter let you run it from a larger tank.
Is it safe to use indoors?
It is approved for indoor and outdoor use and has auto shut-off for tip-over, pilot loss and low oxygen. Follow the manual's ventilation guidance and never use it in a sleeping area.
Does this model have a fan?
The Pro Series is built around an integrated fan that blends radiant and convective heat. Mr. Heater has removed the fan on some MH18B units, so confirm what the specific unit includes.
Will it work at high altitude?
Mr. Heater warns the heater may shut off above 7,000 ft of elevation. Plan for a different heat source at higher altitudes.
How long does it run on 1 lb cylinders?
Runtime depends on the heat setting; Mr. Heater lists a maximum of 220 hours. On high, owners report the small cylinders empty much faster.
Where is the Mr. Heater 18,000 BTU Big Buddy Pro Series Portable Propane Heater cheapest?
At routeshop shop, for $251.99, as of our latest check.

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