2 x 4 Gas-Fired Finisher Evaporator with Lid
2 x 4 Gas-Fired Finisher Evaporator with Lid Smoky Lake Gas-Fired Finisher Evaporator, 2x4 Smoky Lake 2 x 4 Gas-Fired Finisher Evaporator with Flat Pan

2′ x 4′ Gas-Fired Finisher/Evaporator — Customize It!

(1 customer review)

From: $1,690.71

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This is a handcrafted, table-top propane finishing unit containing FIVE Smoky Lake LP jet burners. The high quality arch body is fully insulated, which guarantees superior efficiency and a definite “wow” factor while boiling. The artisan-quality pan is also handcrafted with Smoky Lake exclusive features such as Level Assist. The entire unit is applauded for its great functionality and high performance.

NOTE: Some Assembly May Be Required

Standard Features

  1. Gas-Fired Arch
    • Smoky Lake Exclusive Jet Burners – Qty 5
      (Propane [20 PSI] or Natural Gas [2 PSI] options available)
    • Manifold
    • Regulator
      (Applies to propane only)
    • Chimney elbow and pipe
    • Fully insulated furnace body
  2. Premium Evaporator Pan
    • Both Flat and Divided models available
    • 22 gauge, mirror finish stainless steel
      (Much more efficient than competitors’ thicker gauges)
    • TIG welded (NEVER Soldered)
    • Full length handles
    • Level Assist Feature
      (This 2″ fill line helps ensure consistent liquid depth throughout the pan) 
    • FREE Accessory Kit
      (We’ll adorn your pan with premium hardware and a thermometer. Customize your Finisher/Evaporator below for more details.)
    • Quick Start Guide
  3. More Bonuses
    • Limited Lifetime Guarantee on TIG welds
    • Handcrafted in USA!
    • Free Shipping or Discount for Local Pick up
    • Customizable

SKU: SL-JBEVAP2448 Categories: ,


Finally a bench-top, high efficiency gas-fired heating system dedicated solely to the purpose of evaporating sap and finishing syrup. Smoky Lake Maple Products is the first to bring you a sealed combustion propane fueled burner that has the ability to connect to a vent or a chimney.
The multiple air-cooled turbo jet burners, when on high fire, are able to bring your raw sap up to a full boil in less than in less than 8 minutes, and the included regulator allows you to throttle the heat back to the perfect setting to maintain your temperature all day long. The 2′ x 4′ version is able to bring 40 gallons of finished syrup to bottling temperature in 20 minutes.
Though chimney venting is not required with this unit, it is recommended when using the heater in a confined space for extended periods of time.
Fully insulated with ceramic fiber insulation, the heat is directed into your pan, not allowed to spill into the room and be wasted.
The burners produce about 75,000 btus per nozzle. They use high pressure, 20psi.
Please note that the propane version of this evaporator is 20 PSI to connect to an LP tank, outdoors. The natural gas option would be reconfigured to 2 PSI.

NOTE: Some Assembly May Be Required

Fuel Efficiency

The 2′ x 4′ Gas fired burner system will consume about 9 lbs of LP per hour at a moderate rate of fire. At this rate the pan will be evaporating around 10–12 gallons per hour.  This is a very efficient way to boil sap with gas!

On maximum fire, the 5 burners on the 2′ x 4′  burner set are capable of consuming up to 16 lbs of LP at which rate the evaporation rate increases disproportionately to about 15 gph.  Moderation and fine tuning are important if you’re using this system as your primary evaporator.  A pressure gauge on the burner manifold makes this quite easy.  Likewise, a marginally lower firing rate will be more fuel efficient, but with a slightly lower evaporation rate.

Natural Gas Conversion

2 PSI is required if you opt for the natural gas version of this burner. Your home will have a 2 PSI service to the meter outside, but is likely reduced to 1/4 PSI before entering the house. Many people have converted the service at their home in order to run our 2 PSI system. This conversion is done by your gas supplier for no cost. However, after the service is upgraded to 2 PSI, it will be your responsibility to put a local 1/4 PSI regulator before each of the appliances in your home (water heater, furnace, etc.) This might cost anywhere between $200 and $500 depending on if you hire this work out or do it yourself.

In many cases, it is more straight forward and cost effective to use propane.  The propane model has a wider range of heat and also slightly more top end power.  The LP model is an excellent system.

1 review for 2′ x 4′ Gas-Fired Finisher/Evaporator — Customize It!

  1. Tim

    Guys, this thing is almost too good to be true. The craftsmanship is top notch, both of the burners, NG and LP are unbelievable! The power and BTU’s are seriously cool. For the price this cannot be beat, there is nothing else in LP or NG that comes even close to this. Smoky Lake team is great to work with. Thank you for SL for this incredible maple machine.

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