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RF MacDonald Co. offers sales, packaged systems design, service, installation, and parts for our customers!  

To request information or a quote, please use our Information/Quote request form!

IVSI Material Insulated Positive or Negative Pressure Piping System

Ideal for discharging exhaust gases and fumes from boilers, heaters, ovens, engines, turbines and kitchen appliances.

• Your Choice of 1", 2" or 4" insulation.
• 11 lb. density insulation reduces skin temperature for a safer environment.
• Saves on cooling bills - reduces ambient temperature in boiler and engine rooms.
• Interchangeable with all AMPCO stack components. Use insulated sections only as required!
• Increases usable floor space - reduces clearance to combustible and non-combustible materials.

Ideal for discharging gases and fumes from boilers, heaters, ovens, engines, turbines, and kitchen appliances

•  Your Choice of double wall 1" air VSI II or triple VSI III construction.
• Easy to install - no welding or on-site fabrication.
• Complete line of accessories lets you handle the toughest configurations and requirements.
• UL/ULC Listed for building heating appliances and 1400 degree appliance chimneys. 

Ability to reduce clearances to one half inch  Greatly reduces requirements of welded steel and those of competitive products while providing a safer environment  Saves on cooling bills by reducing appliance radiated exhaust heat  Agency listed for temperatures up to 1000 degrees F continuous, 1400 degrees F intermittent and 1400 degrees F continuous, 1800 degrees F intermittent  Interchangeable with all other AMPCO positive pressure components  Material or air insulated components can be integrated to achieve desired results within a single exhaust system