anatomy of a Concentric Exhaust System SL-CES
Concentric Exhaust System, Customer Photo Concentric Exhaust System Concentric Exhaust System - Tee Fitting Concentric Exhaust System video

Concentric Exhaust System

From: $1,299.00


  • Steam Pipe insulates the Smoke Pipe and allows for zero clearance from combustibles
  • Dramatically increased natural draw in Steam Pipe
  • Hot embers are extinguished by the steam when they reach open air
  • Requires only ONE roof penetration
    • Reduces risk of roof leaks
    • Reduces potential roof jams
  • Cost is comparable to other systems
  • Easier hood removal on your evaporator
  • Condensation drain
    • Evacuates both condensation and rain
    • Prevents rust from developing in your arch


  • Riser
  • Tee with Drain Port
  • Stainless Steel 90º Elbow (attaches to hood)
  • O-Ring Gaskets, Qty 2
  • Strap Stack w/Hardware (connects the “Tee” and the 90º Elbow)
  • Concentric Fins (Keeps the smoke stack centered within the steam stack. Not visible in the feature photo.)
  • Smoke Pipe (Available a la carte.)
  • Steam Pipe (Not shown in feature photo. Orders placed after 8/30/23 will automatically include one 2-foot long starter piece. Additional pipe is available a la carte.)
  • Stainless Steel Roof Jack w/Collar (Sold Separately. Not visible in feature photo.)
  • Smoky Lake Fitted Hood (Sold separately. The Concentric Exhaust is not compatible with suspended hoods nor competitor hoods.)


Assembly Instructions

The cooler steam pipe completely surrounds and insulates the extremely hot inner smoke pipe, allowing you zero clearance to combustibles and making a safer environment in the sugarhouse.

The hot inner smoke pipe dramatically increases the natural draw of the steam pipe. This creates a negative pressure inside the steam hoods, thus reducing steam in the sugarhouse.

The steam exhaust surrounds the inner smoke pipe. This will greatly reduce fire danger by immediately extinguishing hot embers and sparks as they enter open air.

The Concentric Exhaust System allows for only one roof penetration, instead of two or even three. This will reduce the potential for roof leaks and snow jams.

The Concentric Exhaust System requires only one roof jack for roof penetration and one stack cover. Other systems require two or even three. Each roof jack costs $400 – $500, each stack cover costs about $200. The savings in roof jack expense and stack cover expense normally covers the expense of this upgrade; or more than covers it.

The horizontal pipe extending from the top of the hood to the tee fitting is a removable strap stack. This makes hood removal many times easier than a normal scenario where the weight of the long vertical stack pipe is resting on the hood.

On the outer pipe — located at the bottom of the tee fitting — is a condensation drain. This will control any water that might develop in the pipe from condensation and will also control and evacuate any rain water that might enter the system from above the roof. This prevents moisture from running down onto the arch and causing rust as it would with a traditional system.

This Is What It Boils Down To

Sizes of the Concentric Pipe Pairs

Outer Pipe Diameter (Steam) Inner Pipe Diameter (Smoke)
12″ 8″
14″ 10″
17″ 12″
20″ 14″
Builder Spec Sheet


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