Dairy Cooler build

Discussion in 'Fridge/Freezer Builds' started by benjfire, Nov 25, 2015.

  1. benjfire

    benjfire Newbie



    Picked up this dairy cooler for $40, all metal inside. Started to gut it out and was wondering if this insulation will be sufficient for hot smoking? What is your guys opinions on a smoke generator? Any advise would be great! Got a auber pid and a brinkmann element for heat and control. Thank You
     
    Last edited: Nov 25, 2015
  2. wolfman1955

    wolfman1955 Master of the Pit

    From your picture looks like fiberglass. Here is what I found for temp. ranges of insulation.

    Looks like Fiberglass is good to 1000 deg. F.
    Insulation MaterialTemperature Range
    LowHigh
    (oC)(oF)(oC)(oF)
    Calcium Silicate-1806501200
    Cellular Glass-260-450480900
    Elastomeric foam-55-70120250
    Fiberglass-30-205401000
    Mineral Wool, Ceramic fiber    12002200
    Mineral Wool, Glass032250480
    Mineral Wool, Stone0327601400
    Phenolic foam    150300
    Polyisocyanurate or polyiso-180-290150300
    Polystyrene-50-6075165
    Polyurethane-210-350120250
    Vermiculite-272-4597601400
     
  3. wolfman1955

    wolfman1955 Master of the Pit

  4. benjfire

    benjfire Newbie

    I was looking at those. I can't seem to find any info on how they work or how they burn or where you put them? Can I build a offset box or put it right in the smoker? Thanks for your reply! 
     
  5. wolfman1955

    wolfman1955 Master of the Pit

    You can do either of those. Search "mailbox mod" that is what a lot of people on here do so that you can hot and cold smoke. The generator will produce heat if you put it inside the smoker and in the smaller masterbuilt type cabinet smokers it gets to hot for cold smoking.

    As far as how it works you just fill it up with pellets and light one end of it with a propane torch.
     
    Last edited: Nov 25, 2015
  6. benjfire

    benjfire Newbie

    That looks like the set-up to me! I have a top vent bought for my smoker, do you think I would need a intake vent towards the bottom to get flow or will there be sufficient flow if the mailbow is vented?
     
  7. wolfman1955

    wolfman1955 Master of the Pit

    You want to have the same amount of air going into your smoker as you have coming out you so that you avoid stale smoke in the cook chamber.
     
    Last edited: Nov 25, 2015
  8. wolfman1955

    wolfman1955 Master of the Pit

    But if you pull to much air in thru your mailbox it will cause the pellets to flame instead of smolder. What I would do is put an adjustable air intake on the lower part of your box that is the same size as your exhaust out the top then you can regulate it so that you get the proper flow thru your mailbox for good smoke generation. 
     
  9. madman mike

    madman mike Smoking Fanatic

    your cooler is large enough you wont really ned a mailbox mod to cold smoke. The space is so large you can keep the temp down with decent airflow. Just keep the tray need the air intake.

    you're ok with glass insulation. Though Roxul is preferred due to being a little denser and better flame resistance.
     
  10. benjfire

    benjfire Newbie

    I have some wooden pieces for backing for the door and inside panels of this smoker. I'm assuming these will be alright to leave in there or should I replace with steel?
     
  11. madman mike

    madman mike Smoking Fanatic

    you could leave the wood, as long as its not too close to the heat source. make sure there is no wood near the element. if its has metal over it the walls and door will be fine. seal them up really well.

    make sure there is no wood within several inches of the element, or under it. even if it has metal over it.
     
  12. benjfire

    benjfire Newbie

    Thanks for the help, I have a couple more questions. Can I use the typical high temp rtv silicone from like Carquest, or does it have to be some kind of food grade stuff? Do you think I can use the existing magnetic strip door seal, or should I get something else? It doesn't seem much different from the door gasket on my Masterbuilt?
     
  13. benjfire

    benjfire Newbie

    From what I gather, looks like I might have to buy a silicon gasket and add a latch for the door?
     
  14. wolfman1955

    wolfman1955 Master of the Pit

    In my opinion and in my smokers, I use the high temp silicone as long as it does not come in direct contact with food. As for the door gasket I would try the existing magnetic one to see if it works ok at sealing the cook chamber. What may happen is that the existing seal might not do well with heat.

    Wolf!!!   
     

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