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MPS 340G ThermoTemp XL Propane Smoker

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$undefined.00 /mo* suggested payments with months* financingApply Now
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Product Overview

The MPS 340G makes propane smoking simple and safe. No more monitoring or adjusting temperature. Patent-pending ThermoTemp innovation lets you set the temperature and walk away. The safety shut-off valve provides a safe smoking experience while the 4 smoking racks provide plenty of room to smoke your favorite foods. Master the art of smoking with Master built.
  • Thermostat controlled temperature; no need to manually adjust as with traditional propane smokers and no electricity required
  • Safety valve shuts off burner if flame is extinguished
  • Tank fuel level gauge indicates the amount of propane in the tank
  • Temperature sensor controls burner to maintain desired temperature
  • Dual-door design to add wood chips without losing heat
  • 4 chrome-coated smoking racks
  • 15,750 BTU stainless steel burner
  • Full viewing window
  • Push-button ignition
  • Handle and wheels
  • Dual-wall construction
  • Adjustable air damper for smoke control
  • Removable drip pan for easy clean-up
  • Water bowl for adding moisture and flavor
  • Removable wood chip tray for easy ash removal

  • California residents

Info & Guides

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Assembled Depth (in.)
22.835 in
Assembled Height (in.)
52.953 in
Assembled Width (in.)
28.74 in
Cooking Space (sq. in.)
961 in²


Accessories Included
No Additional Items Included
Grill Color Family
Grill Wheels
Grill/Smoker Category
Vertical Smoker
Grill/Smoker Features
Automatic Shut-Off,No Additional Features,Propane Fuel Gauge,Window
Grill/Smoker Fuel Type
Propane Tank
Ignition Type
Number of Cooking Racks
4 Racks
Outdoor Living Product Type
Product Weight (lb.)
91.882 lb
Total BTU
15750 Btu

Warranty / Certifications

Certifications and Listings
CSA Certified
Manufacturer Warranty
1 Year

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.1
    out of 123 reviews
  • 84% recommend this product
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Showing 1-10 of 123 reviews
Best gas smoker!!!
Great smoker! Set it and forget it. Love the cooking ability.
  • Verified Purchase
  • Recommended
Very happy with this smoker!!!!
I waited a long time to select my Smoker. Did not want tech in my Smoker or smoke pellets…. Just wood chips and an old fashioned thermometer. Very well built and how it keeps Temperure is excellent…
    • Recommended
    Great Taste
    I bought my smoker last year and I hasn't and never will used a charcoal grill again. I put my meat on and walk away. Meat is so tender and crispy . The smoke taste after complete is delicious. I recommend to all.
      • Recommended
      Best purchase I’ve made in awhile
      Smoker works excellent and keeps the temperature right where you set it. Smoked fresh bacon from my pig and it turned out perfect. Smoked ribs and Boston butts and a ham and the results were perfect every time.
        • Recommended
        Best investment ever!
        I bought this in May 2020 and I love it! I cooked 6 slabs of babyback ribs and 2 whole chickens at one time for a work cookout and it was amazing. I also cooked our turkey this year in the smoker and it was one of the best turkeys I ever had. I also follow some of the recipes that you offer on your Masterbuilt website for smoking meat.
          • Recommended
          Great smoker
          This smoker works great and keeps the temperature pretty darn close to your setting. Wish the wood chip pan was a little bigger but it smokes great!
          • Verified Purchase
          • Recommended
          Great Smoker
          My son bought this for me, because I have wanted one for so long. It was package pretty tightly in the box. Got a little damaged in shipment, but I don’t mind that. Just as long as it works good. That it did.!! Works great. The dial is pretty accurate once that smoker is preheated. Smokes a 14llb brisket for 14 hrs on 225 and it came out awesome. No worries . Would definitely recommend this smoker!!
            • Recommended
            SO FAR SO GOOD!
            Very quick delivery. I put the smoker together with no problems. I did use the video online rather than the written instructions. Did my first smoke of baby back ribs and they came out superb! The only thing was the grease catcher seemed to overflow a bit. That could have been user error with the preparation of the ribs. So far so good!
              • Recommended
              Little problems
              Assembled in January and waited until some decent weather in March to try and get it prepared to use. Hooked to a new propane bottle and no flow, wouldn’t read anything on the gage. I messed with it and found that the check ball in the tapered nozzle that seats against the tank was glued in a position to kill the flow. A little tap with a small punch freed the ball to where it would rattle if shook. All is working fine now. Was very close to shipping the LP line back to Masterbuilt for a replacement. Need to add 2 rotisserie’s and a cover and I should be all set for some time.
                • Recommended
                Great value!
                4th smoker that I have owned... second Masterbuilt ... by far the best features of them all. Temperature holds +\- 5 appears to be very substantial .... time will tell. Results have been outstanding... overall great value!!
                  • Recommended
                  Showing 1-10 of 123 reviews