Photo courtesy of Country Stoves & Sunrooms, East Aylesford, NS Canada

Model RIS is a type “A” factory-built chimney suitable for venting negative or neutral draft (non-pressurized) appliances including boilers, building heating equipment, fireplaces and stoves. RIS has been designed, tested, and listed to vent large wood burning fireplaces and to extend masonry chimneys.

Model RIS – Large diameter insulated chimney

Model RIS is large diameter insulated chimney suitable for use on appliances that burn wood, oil, coal, natural gas and charcoal and is available in 10” through 24” diameters.- 

 We build it better, so we back it longer

Model ris Limited Warranty

Technical Information


Model RIS is tested and listed by Intertek Testing Services to the following standard:

UL 103HT – The standard for solid and liquid fuel chimneys.


RIS chimney is suitable for use on appliances that burn:

  • Wood
  • Oil
  • Coal
  • Natural or LP Gas
  • Charcoal

Model RIS is certified to vent wood burning stoves, fireplaces and residential furnaces. In addition, there are a number of RIS components specifically designed and certified to vent large open masonry fireplaces burning wood and/or gas. There are also specific components designed to extend masonry chimneys and repair earthquake damaged masonry chimneys.

Note for customers in Canada: Model RIS is not certified to the ULC S-629 Standard. Do not install an RIS system on a wood fireplace without first contacting your local authority for approval. ICC can provide complete engineering services (sizing, material selection, installation recommendations, drawings etc.) to assist you in obtaining approval. However, we can not guarantee that it will be accepted in all cases. If you have a large fireplace project you would like to quote on please be sure to contact us in advance so we can work with your local engineer, architect and building authority.

Allowable Flue Gas Temperatures

  • Max Continuous 650°C (1000°F)
  • Brief Forced Firing 925°C (1400°F)
  • Tested To 1150°C (2100°F)
  • Clearance to Combustible Materials
  • Model RIS is certified for 2” clearance to combustible materials.
Flue .018” – .025”, stainless steel
Casing .018” – .025”, stainless steel or
.018” – .025” galvalume steel
Seam Interior and exterior seams are continuous seam welded
Insulation Thermoplus continuous blanket
Wall thickness 1”




Industrial Chimney Company (ICC) warrants its RIS chimney systems to be free from functional failure due to defects in material or workmanship for as long as the original consumer owns the chimney system. This warranty provides for replacement of any components which fail as a result of normal use on a residential fireplace, wood burning stove, furnace or boiler and includes replacement of any components damaged as a result of a chimney fire. (Note: Chimney fires are dangerous and preventable. We strongly encourage you to have your chimney cleaned regularly.) ICC warrants all stainless steel chimney components against perforation as a result of corrosion. This warranty does not cover damage caused to the building by chimney fires or misuse of the product.

No claims under this warranty will be honored unless ICC is notified of the potential claim and is given the opportunity to have one of its agents examine the chimney prior to replacement.

ICC will only be responsible for repair or replacement of any components found to be defective under this warranty. In no event shall ICC be responsible for any incidental or consequential damage caused by defects in the RIS chimney system.

During the first ten years of the warranty ICC will provide replacement chimney components at no charge. During the balance of the warranty ICC will provide replacement chimney components at 50% of the current retail price at the time of the warranty claim.

ICC will not be responsible for labor of any kind required in the removal or replacement of an RIS system replaced under this warranty.

These chimneys are designed to vent residential heating oil, untreated wood, low sulphur coal, and natural or LP gas. They are designed to operate at a continuous temperature of 650°C (1200°F) or less. They are not designed to vent condensing oil or gas appliances. This warranty is void if the chimney is used in an application for which it is not designed.

The RIS systems must be installed according to the Installation Instructions included with every system at the time of purchase. If you do not have a set of installation instructions, they are available free upon request. This warranty is void if the chimney is not installed according to the installation instructions.

This warranty may not be extended or modified by our agents or representatives. This warranty is in lieu of all other express warranties or guarantees, of any kind.


Need help choosing the right components to install your chimney?

If you’re installing a wood stove, our chimney configuration tool will walk you through finding all the right parts for your job.

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Chimney configurator

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