Untitled Document
 MODEL CF SENTINEL CHIMNEY FAQ's
Solution Q. What factors do you need to consider for a correct chimney installation?
A. You need to consider 3 main factors:
- the correct type of chimney for the appliance because there are options, some unsuitable;
- the correct size of chimney for the appliance, which is usually the size of the appliance outlet;
- correct installation is achieved by following the manufacturer's instructions exactly;
Chimney installations may be inspected by certified professionals (NFI or CSIA in US & WETT or APC in Canada).

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Q. What are good Wood Stove performance characteristics?
A. Generally, if you notice the following characteristics, your Wood Stove & Chimney are performing well:
Fires are easy to light and draft builds quickly
There is no smoke spillage when you try to light a fire
There is no smoke spillage when you open the door to tend the fire
There is no cold air or odor through the stove when it is not in use

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Q. How do chimneys work?
A. Think of a chimney as the engine that drives the heating system. Think of the heat as fuel. Think of the draft as power. The more fuel (heat) you give this engine (chimney), the more power (draft) it will deliver. The hotter the exhaust gases, the more draft produced. Draft is the suction that exhausts fumes and keeps smoke from coming into the room. Insulation in the chimney is important because it helps to keep the exhaust hot until it is expelled outside, and so, increases draft.

The chimney works with the stove or fireplace in a kind of feedback loop. Heat in the chimney makes a draft, which pulls in more combustion air, which makes the fire burn hotter, which delivers more heat to the chimney which makes more draft and so on. An Insulated Chimney keeps flue gases hotter and makes more draft with less heat.

When you build a fire in a stove connected to a well installed chimney, the kindling ignites easily, draft increases rapidly and you have a bright, hot fire right away without smoking. These are indications that your appliance and chimney system are working perfectly.

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Q. How does Indoor Air effect Chimney performance?
A. Houses are being built more tightly sealed for increased comfort and lower energy costs. Using doors and windows with gaskets and walls with a continuous air barrier does this. An appliance that uses a large volume of air (a powerful range hood or downdraft kitchen exhaust) used in a relatively small, tightly sealed house will draw air from the house. If too much air is drawn, such that the pressure inside would fall enough to overcome chimney draft, it could pull the smoke out of the stove and into the house. This is known as "negative pressure". To alleviate a negative pressure situation, avoid use of appliances that use large volumes of room air, or have a "make up air supply" system installed.

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Q. Why is an insulated chimney a good choice?
A. Safety and Performance. In Canada, Wood Stoves are required by code to use a Chimney system like Model CF Sentinel, which is certified to the CAN/ULC-S629 safety test standard. Also, Flue gases stay hotter in chimneys with insulation around the liner. Insulation contributes to stronger draft and reduced condensation of smoke and water vapor.

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Q. What safety certification has Model CF Chimney been tested to?
A. The Sentinel chimney has passed and completed all tests in accordance with the Standard CAN/ULC-S629 for 650°C factory-Built Chimneys. The temperatures used in this standard are: 1200°F (650°C) continuous (normal firing), 1700°F (925°C) one hour (overfiring) and 2100°F (1150°C) half-hour (creosote burn out) three times.

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Q. Can I install two appliances on my Sentinel chimney?
A. Each appliance should be operated with its own venting system. Make sure your installation will conform with all federal and municipal building code requirements. Contact local building or fire officials about restrictions and installation guidelines in your area.

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Q. Can I connect my Sentinel chimney directly on my wood stove?
A. No, do not install your Sentinel chimney directly at the outlet of the appliance. Interconnecting Smoke Pipe (Selkirk Model DSP) is required unless the appliance is specifically approved for that type of installation. Check with the manufacturer's instructions that come with appliance for approval information.

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Q. Why is Model CF Chimney packed with over 2 inches of insulation?
A. The 2+" of solid packed insulation is both a safety and a performance feature. The primary purpose of a chimney system is to keep flue gases hot for enhanced draft of the appliance and to keep the building materials around the chimney cool for safety. The 2+" of premium fibre insulation used in Model CF provide significantly more thermal protection than a 1" chimney would (especially chimney's constructed with "blanket" type insulation) to help keep high flue gas temperatures within the chimney.

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Q. How close to the wall can I install my CF Chimney?
A. Model CF Chimney requires a 2" clearance from any combustible materials.

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Q. What size of chimney should I connect to my stove?
A. The inner diameter of the chimney will usually match the flue collar size of the stove.

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Q. How do I determine which CF parts I need for my installation?
A. The Model CF Installation Planning Guide will take you step-by-step through selecting the proper components. Convenient Kits are available for Ceiling and Wall Support installations. These kits contain parts common to most installations. The Length Selector Chart in the Installation Planning Guide then guides you to determine required chimney lengths.

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Q. Are locking bands required to install my chimney system?
A. Locking Bands are included with each Length, Tee and Elbow of Model CF Chimney and must be installed at each joint. Locking Bands help secure your Model CF Chimney system and also provide a more finish look.

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Q.How much chimney can be installed using a Ceiling Support?
A. Selkirk's Model CF Ceiling Support holds 40 ft of chimney.

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Q. How much chimney can be installed using a Wall Support?
A. Selkirk's Model CF Wall Support holds 40 ft of chimney.

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Q. What if I have more than 40 ft of chimney?
A. You would add a roof support to your system if you have more than 40 ft of chimney. Selkirk's Roof Support will support an additional 30 ft. of Model CF Chimney.

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Q. My"Through-the-Roof" installation cannot go straight up, what should I do?
A. You will need to offset your chimney using elbows. Elbows are available in 15° and 30° offsets.

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Q. I have 6 ft of chimney above my roof. How should I support it?
A. A Universal Roof Brace must be use when chimney extends 5 ft or more above the roofline.

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Q. How do you properly seal a roof flashing to a corrugated metal roof?
A. Use Selkirk’s Rubber Boot Flashing. This roof flashing has a flexible and malleable rubber base which can be shaped to accommodate your corrugated metal roof. The Rubber Boot Flashing Kit also contains all the parts required to keep outside temperatures away from the actual boot with a system while still allowing proper ventilation.

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Article Details
Article ID: 2
Created On: 02 Mar 2007 12:05 AM

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