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Deal.ai › Mr. Heater
Mr. Heater
Mr Heater 4000 to 18000 BTU 3 Setting Portable LP Gas Heater Unit with Dual Tank Connection for Indoor and Outdoor Use
Mr. Heater

Mr Heater 4000 to 18000 BTU 3 Setting Portable LP Gas Heater Unit with Dual Tank Connection for Indoor and Outdoor Use

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$219.99at doorup shopChecked Nov 9

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Price facts

  • Last seen at $219.99 at doorup shop on Nov 9.

Our take on the Mr Heater 4000 to 18000 BTU 3 Setting Portable LP Gas Heater Unit with Dual Tank Connection for Indoor and Outdoor Use

The Mr. Heater Big Buddy is a portable propane heater with three heat settings: 4,000, 9,000 and 18,000 BTU per hour, rated to warm up to 450 square feet. It runs on two 1 lb propane cylinders screwed onto its swivel regulators, or on a larger tank up to 40 lb with a separate hose and filter. A single knob with piezo ignition lights it, and an oxygen-depletion sensor and tip-over shutoff cut the gas if it falls. It suits campers, hunters, garage and shed users and porch sitters who want quick radiant heat without electricity; rivals like the standard Buddy are smaller and cheaper but top out at 9,000 BTU. Owners like the output and the dual-tank setup, and commonly note the fan is sold separately and that it needs ventilation.

Best forCold-weather campers and tent or RV usersGarage, shed and workshop heatingHunters and ice-fishing sheltersPorch and patio spot heating
Pros
  • Three heat levels up to 18,000 BTU
  • Runs on two 1 lb cylinders or a larger tank with a hose
  • Tip-over and low-oxygen shutoff
  • No electricity needed
  • Built-in handle and compact body
Cons
  • Fan is a separate accessory
  • Propane, hose, filter and batteries not included
  • Needs fresh-air ventilation
  • Cylinders can frost up in cold weather

Mr Heater 4000 to 18000 BTU 3 Setting Portable LP Gas Heater Unit with Dual Tank Connection for Indoor and Outdoor Use prices at every store

  • doorup shopNew

    In stockShips from the UK · duties may applyReturn policy

    $219.99Checked Nov 9
    Visit doorup shop

What reviewers say

Owners rate the Big Buddy highly for fast, strong heat in tents, garages and ice shacks. Common complaints are the cost of running it on 1 lb cylinders, the fan being sold separately, and the need to keep a vent or window cracked.

What people mention
  • Heat outputPraisedOwners say the high setting warms a tent or garage fast even in freezing weather.
  • Fuel costCriticisedReviewers note that 1 lb cylinders burn through quickly, pushing people to a refillable tank.
  • FanCriticisedBuyers complain the blower fan is a separate purchase and the unit is radiant-only without it.
  • Safety shutoffPraisedThe tip-over and low-oxygen shutoff are cited as reasons owners trust it indoors with ventilation.
  • VentilationMixedUsers say it must be used with a cracked window or vent, and some notice odor and moisture.
  • SetupMixedSwivel regulators make two-cylinder hookup easy, but some find them stiff and the hose needed for big tanks is extra.

About the Mr Heater 4000 to 18000 BTU 3 Setting Portable LP Gas Heater Unit with Dual Tank Connection for Indoor and Outdoor Use

Heater Big Buddy is a portable propane heater for indoor and outdoor use, such as campsites, ice shanties, porches, decks and sheds. It has three heat settings: 4,000, 9,000 and 18,000 BTU per hour. It heats an area of up to 450 square feet.

It starts with a single control knob and a piezo sparking mechanism. Two swivel regulators let it run on two 1 lb propane cylinders screwed directly on. It can also connect to a 20 lb tank with Buddy accessories, or to tanks up to 40 lbs with an additional hose and filter.

The Life Safety System includes an oxygen depletion sensor, a thermal shut-down system and a tip-over switch. The automatic safety shutoff turns the heater off if it tips over.

Heat output
4,000, 9,000 or 18,000 BTU per hour
Heat range
Up to 450 square feet
Fuel
Propane
Tank connection
Two 1 lb cylinders via 2 swivel regulators; 20 lb tank with Buddy accessories; up to 40 lb tanks with an additional hose and filter
Ignition
Piezo sparking, single control knob
Safety
Oxygen depletion sensor, thermal shut-down system, tip-over switch with automatic shutoff
Use
Indoor and outdoor
Model number
MH18BNF
Part number
F274805
Package size
18.9 x 17.7 x 12.2 inches
Not included
Hose, filter, batteries and propane

Questions and answers

Can the Big Buddy be used indoors?
Yes, with fresh-air ventilation such as a cracked window or vent. It has a low-oxygen shutoff, but it is not for sealed, unvented rooms or sleeping areas.
How long does it run on two 1 lb cylinders?
Roughly 1.5 to 3 hours at the 18,000 BTU setting and much longer on the low setting. For all-day use, connect a 20 lb tank with the hose and filter.
Does it come with a fan?
No. The blower fan is a separate accessory; without it the heater works as a radiant unit only.
What do I need to run it from a 20 lb tank?
A Buddy-series hose and a fuel filter, sold separately. The heater accepts tanks up to 40 lb with that setup.
How is it different from the smaller Mr. Heater Buddy?
The Big Buddy adds a third setting and more output, up to 18,000 BTU and 450 square feet, plus two swivel regulators instead of one.
Does it need batteries?
Yes, for the fan and ignition on some setups; batteries are not included.
Where is the Mr Heater 4000 to 18000 BTU 3 Setting Portable LP Gas Heater Unit with Dual Tank Connection for Indoor and Outdoor Use cheapest?
At doorup shop, for $219.99, as of our latest check.

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