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Internet # 304909148

Model # MH18B

Store SKU # 259581

Store SO SKU #1002195515

Big Buddy Pro Series 18,000 BTU Portable Radiant Propane Indoor/Outdoor Space Heater

$168.08
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  • Indoor safe radiant propane heater emits 4,000/9,000/18,000 BTU
  • Equipped with safety shut-down systems for protection
  • Provides 450 sq ft of coverage for up to 11 hours with dual tanks
  • View More Details

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Product Details

About This Product

Cold campsites and frozen lakes call for the warmth of a Big Buddy Pro Series heater. For your next excursion, the Big Buddy Pro Series will keep you comfortable with up to 18,000-BTU of heat. Swivel regulators make for easy setup; just screw on 2 1 lbs. propane cylinders or connect to a 20 lbs. tank using Buddy accessories, the 450 sq. ft. of coverage makes any ice shanty a sauna and any deck a Sunroom. With the heaters Life Safety System you won't sweat too much knowing the oxygen depletion sensor, thermal shut-down system and tip-over switch are keeping you safe. For all of your indoor and outdoor adventures, the Big Buddy Pro Series is there for you.

Highlights

  • Emits 4,000, 9,000 or 18,000 BTU/hr radiant heat
  • Designed and approved for indoor and outdoor use
  • Heats up to 400 sq. ft.
  • Big buddy dual heating system combines radiant heat comfort with convection heat air flow
  • Hi-med-low heat settings
  • Runs 10.8-hours on lowith 4.8-hours on medium/2.4-hours on high
  • Automatic low oxygen shut-off system (ODS)
  • Accidental tip-over safety shut-off
  • Connects to two 1 lb. cylinders
  • Electronic ignition
  • Built in high-powered fan
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 304909148

Model # MH18B

Store SKU # 259581

Store SO SKU #1002195515

Specifications

Dimensions

Product Depth (in.)

11 in

Product Width (in.)

17.5 in

Details

Area Heated (sq. ft.)

400 sq ft

Color

Red

Color Family

Red

Control Type

Rotary Button

Features

Tip-Over Safety Switch

Fuel Rate (gallons/hour)

0.834

Fuel Tank Capacity (gal.)

0 gal

Heat rating (BTU/hour)

18000 Btu/h

Heater Type

Radiant

Heating Method

Radiant

Ignition Type

Piezo

Indoor/Outdoor

Indoor, Outdoor

Location Use

Garage, Jobsite, Living Space, Patio

Maximum Temperature Setting (F)

0 °F

Number of Heat Settings

3

Pack Size

1

Portable Heater Features

Handle

Power/Fuel Type

Propane

Returnable

90-Day

Room Size

Medium

Runtime (hours)

3 hr

Vent Type

Ventless

Warranty / Certifications

Certifications and Listings

CSA Certified

Manufacturer Warranty

1 Year

Questions & Answers

Can this kill bedbugs?
ByJul 29, 2026
1 Answer | 
Answer This Question

Hello and thank you for your inquiry! This unit will not safely get up to temperatures needed to kill bed bugs. Hope this helps!

By|Jul 30, 2026


    How long does it take to use a 1 pound canister
    ByJun 24, 2026
    1 Answer | 
    Answer This Question

    Thank you for your inquiry. This heater will go through a single 1 lb bottle in 5.4 hours on low or 2.4 hours on medium. Have a great day!

    By|Jun 26, 2026


      What is battery size needed?
      ByMay 12, 2026
      1 Answer | 
      Answer This Question

      Thank you for the inquiry. 4 D-cell batteries are required, or you can use a 6-volt power adapter part number F276127. Have a great day!

      By|May 13, 2026


        What is the weight of the unit?
        ByApr 28, 2026
        1 Answer | 
        Answer This Question

        Thank you for your inquiry. This heater weighs about 14 lbs. Have a great day!

        By|Apr 29, 2026


          Can it heat a small bedroom to 130 degrees for one hour without shutting off the burner ?
          ByApr 16, 2026
          1 Answer | 
          Answer This Question

          Hello! That will depend on the size of the bedroom. This heater shouldn't be used above medium in a bedroom. If you're running it constantly at that high of a temperature, it's likely that the heater will burn through the oxygen in the room and trigger the ODS sensor, shutting the heater down for safety reasons. Have a great day!

          By|Apr 28, 2026

            (1)

            Would this be sufficient for a 12x12 pop up canopy that has detachable walls? Softball season just started and the games are cold. Fully ventilated since we dont enclose the whole canopy. We have the little buddy and it didn't provide enough coverage!
            ByApr 14, 2026
            1 Answer | 
            Answer This Question

            Thank you for your inquiry. This heater should be plenty powerful for a space that size. The high setting on this unit is 18k BTUs, which can heat up to 450 sqft. Have a great day!

            By|Apr 28, 2026

              (1)

              Why isn't the fan usb powered? It seems it would be more usefull for remote uses.
              ByMar 18, 2026
              0 Answer | 
              Answer This Question

              Does it have a fan?
              ByMar 18, 2026
              1 Answer | 
              Answer This Question

              Thank you for your inquiry. Yes, the Pro Series Big Buddy has a fan. Have a great day!

              By|Apr 28, 2026

                (1)

                Viewing 1-8 of 154

                Customer Reviews

                4.2 out of 5

                • 4.2 out of 344 reviews
                • 57% recommend this product
                Filter by:
                Showing 1-10 of 344 reviews
                Great garage heater and part of my emergency plan
                This heater is great in the garage and as emergency heat in the house. Use 1 or 2 green propane cans or an adapter hose to grill tank. Optional inline gas filter. Fan uses 4D batts or optional power adapter. I use a Ryobi inverter for inverter fan power. Sparker uses a single AAA batt. Big unit. Little Buddy is more portable depending on your space size.
                by
                  • Recommended
                  Bought this heater for my home in the event of power outages in the winter. It’s super easy to assemble and to operate. Puts out a lot of heat even in medium setting (high setting is not recommended for in-home use). Can also connect to 20lb propane tank easily with proper adapter (ensure that you use one like your grill hose, despite other claims, to avoid damaging the unit with dirty fuel). So far so good!
                  by
                  This customer chose to rate the product and not provide text.
                  by
                  Response from Mr. Heater Product ExpertMar 5, 2026
                  Thank you for your review and feedback. We'd like to speak to you about your experience with this unit. Please give us a call at 1-855-663-0660. Enerco
                  Product works great. No issues so far
                  by
                  NEW heater with crumbling plastic
                  I received this heater as a gift from my wife for Christmas 2024. I did not have a need to use it in 2025 (weather not cold enough). With the "arctic freeze" coming up in Jan 2026, I brought the heater out of the package, read the manual, and performed the recommended preventative maintenance which required removing the back cover. I was shocked to see that 3 of the 4 plastic main body tabs under the rear cover were cracked and/or had missing pieces (see pics). In addition to this, one of the 4 mounting points through the back cover had crumbled. The plastic was so brittle, I am concerned about whether I should even use this NEW heater. I gave it 2 stars as the rest of it looked well manufactured - it s too bad the plastic body enclosure eliminated my trust in using it to provide heat during the storm.
                  by
                  Response from Mr. Heater Product ExpertJan 23, 2026
                  Thank you for your review and feedback. We'd like to speak to you about your experience with this unit. Please give us a call at 1-855-663-0660. Enerco
                    Home Depot / UPS/ Roadie Lost Order and Provide Zero Help Resolving Issue
                    I would love to review this item that I ordered from Home Depot on 1/19 for 1/20 delivery, but the package is apparently lost. UPS shows that package was received on 1/20. Roadie shows that they scheduled a gig to pick up and deliver package, but they cancelled the gig with no explanation to me. The status on UPS still shows pending delivery, but neither Home Depot, UPS or Roadie will provide information. Roadie has told me to ask Home Depot for a refund. I am now stuck without a heater for the forthcoming ice storm. TERRIBLE customer service from Home Depot, UPS and Roadie and I have done 100% of the research/legwork.
                    by
                      Don't believe the print on the box.
                      False info. Box does not say that a 20 pound tank needs extra accessories and cannot be used indoors. I bought this so I could use it indoors with a 20 pound tank. Instructions say use the 1 pound tank indoors only in emergencies. Cylinder specs are ridiculous- what is a #600 valve connection? BUY SOMETHING ELSE!
                      by
                      Response from Mr. Heater Product ExpertDec 5, 2025
                      Thank you for your review and feedback. We'd like to speak to you about your experience with this unit. Please give us a call at 1-855-663-0660. Enerco
                        1 found this review helpful
                        TERRIBLE
                        I bought one on November 3rd. It works great on low. 15 seconds on medium it shuts off. EVERYTIME!!! Customer support said return it. I did this morning the 22nd. Got another one. This one shuts off after 1 minute on low and the longest it worked on medium was 45 seconds. I've had enough of this BS. I really wanted this product to work but I am absolutely disgusted at this company right now....
                        by
                        Response from Mr. Heater Product ExpertNov 24, 2025
                        Thank you for your review and feedback. We'd like to speak to you about your experience with this unit. Please give us a call at 1-855-663-0660. Enerco
                          1 found this review helpful
                          This customer chose to rate the product and not provide text.
                          by
                          • Verified Purchase
                          This unit provides ample heating for a small sized room (<400 sq ft). The high setting will reall...
                          This unit provides ample heating for a small sized room (<400 sq ft). The high setting will really throw the heat out & up. I bought the optional 120V adapter for the fan which saves on battery usage. Fan is not overtly speedy but it does blow some heat forward. I am overall pleased with the operation of this equipment.
                          by
                          • Verified Purchase
                          • Recommended
                          3 found this review helpful
                          Showing 1-10 of 344 reviews

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                          Product Snapshot

                          Ideal for indoor and outdoor use, this heater provides up to 18, 000 BTU of heat, ensuring warmth and comfort in various settings.
                          Ideal for outdoor enthusiasts, this heater provides up to 18, 000 BTU of heat, ensuring warmth and comfort in various outdoor settings.
                          Ideal for supplemental heating needs, this heater boasts 30, 000 BTU output, dual fuel options, and a user-friendly design.
                          Ideal for supplemental heating needs , this heater boasts a 30, 000 BTU output and dual fuel compatibility for versatile use . The safety features and easy operation make it a reliable choice for warmth ..

                          Heating Capacity (BTU)

                          18000
                          18000
                          30000
                          30000

                          Heating Method

                          Radiant
                          Radiant
                          Radiant
                          Convection

                          Oxygen Depletion Sensor

                          Tip-Over Shut-Off

                          Indoor/Outdoor Use