Positive Pressure
Precision Vent Quality Seal

Positive Pressure Chimney Systems

  • Tested and listed to UL103 'Standard for Factory-Built Chimneys for Residential Type and Building Heating Appliances'.
  • For venting commercial and industrial boilers, engines, ovens, and processing equipment where temperatures do not exceed 1400ºF continuous and pressures do not exceed 60" W.C.
  • Sizing and system routing must conform to ASHRAE guidelines and NFPA 96. Detailed calculations and system assembly drawings must be submitted for approval.
  • 304 or 316 stainless inner liner , air space or various thickness of fiber insulation, aluminized or stainless steel outer jacket.

5" through 60" diameters are available. Typically these systems are specified by the responsible engineer, so detailed specifications are needed to prepare an accurate quote. These vent systems are built to order and not available in all areas.


Most products are in stock for same day shipment when you order by 2:00pm EST!