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Mr Heater MH18B/F274800 18,000 BTU Big Buddy Portable Space Heater

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Availability: In Stock.
Fulfilled by The Factory Depot

Arrives Mar 20 – Mar 22
Order within 4 hours and 1 minute
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Features

  • POWERFUL HEATING CAPACITY: Provides 18,000 BTU output to efficiently warm areas up to 450 sq ft. Ideal for garages, workshops, job sites, and large rooms during cold weather conditions.
  • PORTABLE AND COMPACT: Designed with a convenient carry handle and lightweight build for easy transport. Move the heater between locations effortlessly to bring warmth wherever needed.
  • ADJUSTABLE HEAT SETTINGS: Features three heat levelslow, medium, and highallowing precise temperature control. Conserve fuel and customize comfort for any indoor space.
  • SAFE INDOOR OPERATION: Includes an integrated fan for even heat distribution and automatic shut-off if tipped or low oxygen is detected. Enjoy peace of mind with built-in safety features.
  • FLEXIBLE PROPANE FUEL: Compatible with standard propane cylinders. Connects to 1 lb disposable bottles or larger 20 lb tanks using an optional hose and filter for extended runtime and convenience.

Description

Experience powerful and efficient heating with the Mr. Heater MH18B Big Buddy Portable Heater, delivering up to 18,000 BTUs of radiant and forced air warmth for spaces up to 450 sq. ft. This portable space heater is designed for indoor use in living rooms, bedrooms, workshops, garages, and job sites, offering reliable supplemental heat where you need it most. The lightweight, floor- mount tower form factor and convenient carry handle make it easy to move from room to room, while the noiseless operation ensures minimal disruption. With three adjustable heat settings, you can customize comfort levels to suit your environment. The heater operates on propane, providing a safe and efficient power source without the need for batteries. Its robust construction and practical features make it a versatile solution for anyone seeking a portable, high-output heater for larger indoor areas with proper ventilation. Dimensions are 26 in. L x 21 in. W x 20 in. H, and each unit weighs 17.1 lbs. This listing includes a package quantity of two heaters, making it ideal for multi- room heating needs.

Brand: Mr. Heater


Special Feature: Noiseless, Portable


Color: Red


Form Factor: Tower


Indoor/Outdoor Usage: Indoor


Brand: Mr. Heater


Special Feature: Noiseless, Portable


Color: Red


Form Factor: Tower


Indoor/Outdoor Usage: Indoor


Mounting Type: Floor Mount


Room Type: Bedroom, Living Room


Heating Coverage: 450


Burner type: Radiant


Number of Speeds: 3


UPC: 089301748002


Product Dimensions: 26 x 21 x 20 inches


Item Weight: 17.1 pounds


Date First Available: January 6, 2018


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Mar 20 – Mar 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Super reliable!!
This is my third buddy heater. Super reliable and safe and no worries, all three work like a charm. Be sure to order the adapter hose that can connect directly to a 20lb propane tank. One other important note, when screwing adapter to the 20lb tank, be sure to screw it in counterclockwise.
Reviewed in the United States on February 8, 2026 by Steven C. Lee

  • Best heater for your garage and will heat your house in a power outage safely if you need
This heater is very easy to start. my garage temperature was 39 degrees f but after an hour or two it was eat 63 degrees. I am running. on a 20 lab propane tank. I am using a Bauer fan to circulate the air and it works great. don't be cheap and get what works
Reviewed in the United States on February 5, 2026 by Amazon Customer

  • Good heater
Works as advertised, even better when used on propane tank. Hose attachment needed
Reviewed in the United States on February 10, 2026 by James P.

  • Ambient heat for the win.
I enjoy the ambient heat instead of forced air. It's more efficient and economical. The ignitor on the older version stopped working, so I am hoping the addition of a battery operated ignitor is better.
Reviewed in the United States on February 18, 2026 by Antoinette Quintal

  • Great product!
Solid product, own multiple. Works great, have never had an issues. Just make sure you have enough fuel for the duration!
Reviewed in the United States on January 30, 2026 by Amazon Customer

  • Great value.
Heater works great for my fishing shanty.
Reviewed in the United States on February 11, 2026 by Marissa Thomas

  • Mr. Heater portable heater
Product delivered quickly, works well. Happy with purchase.
Reviewed in the United States on February 6, 2026 by Deb K.

  • Broken
Product arrived 2 weeks after promised delivery date and was broken.
Reviewed in the United States on February 14, 2026 by Placeholder

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