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Mr. Heater

Mr. Heater F260560 Big Maxx MHU80NG Natural Gas Unit Heater, 80,000 BTU, Black

    • Based on 761 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, May 12
Order within 6 hours and 23 minutes
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Style: Heater


Features

  • Your purchase includes One Mr. Heater Big Maxx Natural Gas Heater with 2 angle brackets & Liquid Propane conversion kit | Thermostat, hose & regulator not included
  • Heater dimensions 29.33 L x 15.50 W x 26.37 H | Coverage area 2000 Sq. Ft. | Performance 80,000 BTU | Amps 2.3 | Voltage 120 V | Min 8 ft. clearance from floor to base of unit
  • For use with natural gas | Category 1 vertical, category 3 horizontal venting
  • Powered exhaust allows for vertical or horizontal venting | Spark ignition features self-diagnostic control module
  • This heater offers the operating versatility and safety that you have come to expect from Mr. Heater | Limited 3 year warranty on parts and burners

Description

If you are looking to turn your garage or barn into a work space you can use all year-round, you will have to find a safe quiet and reliable heat source. This 80,000 BTU Natural Gas Unit heater is the way to go. It uses a built-in electric high velocity fan to pull cool air into the rear of the heater, across a heat exchanger, then forcing warm air into the surrounding areas. These heaters only require 115v AC power and can be vented vertically or horizontally - please check local codes and restrictions. With a mounting clearance of only 1 inch, the supplied brackets, external access to power, and thermostat connections - installation is a cinch. With the Durable Spark ignition and robust factory standard self diagnostic control module, we can offer a 3 year factory warranty on all parts and burners and a 10 year warranty on any defects in the heat exchanger. This heater offers the operating versatility and safety that you have come to expect from Mr. Heater.

Brand: Mr. Heater


Special Feature: High temperature safety shut-off


Color: Black


Form Factor: Unit Heater


Indoor/Outdoor Usage: Indoor


Brand: Mr. Heater


Special Feature: High temperature safety shut-off


Color: Black


Form Factor: Unit Heater


Indoor/Outdoor Usage: Indoor


Product Dimensions: 22"D x 30"W x 27"H


Recommended Uses For Product: Garage, Home


Mounting Type: Ceiling Mount


Room Type: Home Office


Heating Coverage: 2,667 sq ft


Burner type: Radiant


Heat Output: 80000 British Thermal Units


Fuel Type: Natural Gas


Voltage: 120 Volts


Amperage: 2.3 Amps


UPC: 089301605602


Global Trade Identification Number: 02


Item Weight: 85.8 pounds


Department: Unisex Adult


Manufacturer: Mr Heater


Country of Origin: China


Item model number: F260560


Is Discontinued By Manufacturer: No


Care instructions: See product manual


Assembly required: Yes


Number of pieces: 1


Warranty Description: 3 year limited on heater parts; 10 years limited on heat exchanger.


Batteries required: No


Included Components: heater, natural gas to propane conversion kit, and ceiling mounting brackets


Import: Imported


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, May 12

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

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Works great
Style: Heater
Delivered quick, installed and works great. Keeps the entire garage hot and sometimes we need to take out coats off if we are in the garage. It is well below zero and this keeps up with a 2 large two car garage. My gas bill did go up but it sure beats the propane tanks and smell.
Reviewed in the United States on February 14, 2025 by Magicolor
    • Its hard to hang it on other than that work perfect.
Style: Heater
Review Image by Ayman othman Ayman othman
Review Image by Ayman othman Ayman othman
Its heat up my outdoor patio like really good also its simple to controll it .. the only thing dont install it unless you know what you exactly doing
Reviewed in the United States on January 29, 2025 by Ayman othman Ayman othman
    • Very Good Heater, Happy to have it Installed.
Style: Heater
Great heater, great value. Put it to use in my three car detached garage. The garage is fully insulated and thus the heater warms it easily. Some complained it was loud/noisy, I did not find that to be true. Instructions easy to follow for an experienced Do It Yourself. I am very pleased with it's performance and value, you will be too. I needed a propane conversion kit, it was not in the box, I think it fell out perhaps because the box showed up pretty beat up. The heater was damaged a bit, cosmetic mostly. But I did call help desk at Mr. Heater and they were very helpful and sent a propane conversion kit within the week. Got it installed without a problem. Would have given 5 stars if the packaging had been better. Mr heater could design better packaging. Hope they do. You won't be disappointed. ... show more
Reviewed in the United States on March 22, 2022 by Nancy Finnerty
    • Heats a Four Car Garage
Style: Heater
This heater has been more effective than I anticipated. The installation wasn’t bad (I did it all by myself) and I had it up and running in three days. Two of those days were running the thermostat and ventilation pipe. I had contacted a couple heating companies prior to this purchase and they all wanted to charge me $1800 for a similar unit. Great buy! ... show more
Reviewed in the United States on November 13, 2024 by Jason S. Cooper
    • Works well when it works
Style: Heater
This is my second Mr Heater, I have a 50 btu unit as well. The 50k worked for 3 weeks before it stopped working and this one worked for about 1 minute. I fired it up and it worked perfectly. T'he next day the fan would not kick on. Have already been on the phone on hold for about 45 min before leaving a call back number. They will call back, ask me some questions, then say they are sending out a new circuit board, which is what my other one needed also. I'm being generous by giving them a 3 star review, but i'm keeping in mind the cost of the unit which is a really good value. I really like the heater, I just don't know if i can depend on it. Every time i've been on hold with them the recording says they are receiving unusually heavy call volume. Since they clearly know they are selling an unreliable product, it would be nice if they would hire more service tech advisors. I probably spent 3-4 hours with my other heater between time on hold, diagnostic time and actually replacing the circuit board. If you don't like working on stuff you might want to look at a different brand. If you do decide to purchase one just plan on doing your own diagnostics and repairs. Update 1/29/2020- Have been on the phone 3 times doing diagnostics on this heater. It is working but the problem now is that it cycles on and off about every 30 seconds to 2 minutes. I have been asked to checked the voltages in and out of the circuit board and check the pressures sn column of water. The last guy had me disconnect the pressue switch and bypass it. The heater ran for several minutes while he stayed on the phone so he sent me out a new switch. I installed it and it is still cycling. Back on the phone for the long hold and unusual call volume. They called back after a couple of hours and said they were sending me a new control board. 3/25/2020 Installed new control board. Heater still cycles on and off. I'm not getting back on the phone with this company again. Still heats my shop, just not nearly as efficiently as it should. Not very happy overall. Paid new price for a brand new heater and Ive wasted hours of my time for something that has never worked properly and never will. ... show more
Reviewed in the United States on January 20, 2020 by David C.
    • Great value
Style: Heater
Review Image by fghtds fghtds
Review Image by fghtds fghtds
Just got finished with the install. Test ran it for about 15 minutes. I think it’s going to work great in my 40 x 60 shop this winter. Note: several of the negative reviews stated that it would run for a short time then shut off. I had this problem too. The back pressure sensor is really sensitive. I had made a grill for the outside vent. Apparently I didn’t drill enough 3/8” holes in it. I found a better one and it quit tripping the ‘back pressure’ code. Also, I’ll bet a least a couple of those negative reviews were trying to run it on propane with the NG jets in it. They look the same and have the same 3 numbers. Just in a different order. ... show more
Reviewed in the United States on November 2, 2024 by fghtds fghtds
    • Garage heater
Style: Heater
Heats all 3of garage stalls
Reviewed in the United States on February 6, 2025 by Jeffrey A. Davies
    • Easy install
Style: Heater
Easy install, very compact for size
Reviewed in the United States on March 2, 2025 by rod farrell

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