Applications include: fireplace inserts, furnaces, boilers, and water heaters.
CHIMNEY VENTING The flue pipe should be as short as possible with horizontal pipes sloping upward toward the chimney at a rate of one-quarter inch to the foot. open or close to check variations in chimney draft and thereby maintain a constant draft directly upstream of the barometric draft regulator location. Use with gas, wood pellet, oil, or wood appliances. Furnace rooms under 65m³ (700 ft³) should automatically be treated as confined space.
FURNACE FLUE DRAFT CONTROL 5 INCH PROFESSIONAL
DuraFlex AL is recommended for professional installationsĭuraFlex SS offers smooth wall flexible relining for masonry chimney. DuraLiner is recommended for professional installationsĭuraFlex AL is an economical relining system used for relining masonry chimney for natural gas or liquid propane category I, draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent for a wide range of applications. Depending on the outdoor temperature, the pressure differential needed to drive the flue gases up and out of the furnace is somewhere between 1 and 5 Pascals (0.004 to 0.020 in. This brand is recommended for Do it Yourself Homeowners, as well as professional installersĭuraLiner is an insulated, double-wall masonry relining system that ensures safe and efficient venting from heating appliances, while protecting your masonry chimney from the damaging effects of flue gas. The average draft in the fired heaters maintained is at almost 3-4 times the value recommended. Most of the heaters are operating with very high draft. They are intended for use with masonry chimneys venting appliances that burn home heating oil, LP or natural gas and solid fuels including wood, coal and pellets. While most of the plant operators and engineers are aware of the importance of controlling Excess Oxygen in the fired heaters, the draft control in fired heaters is often over looked. This article and video are strictly for informational and demonstration purposes.Lifetime Chimney Liner - Lifetime Chimney Liners are strong, flexible liners that are constructed with 316L grade stainless steel. This is a very serious issue and a furnace MUST be installed by a licensed HVAC technician.
(This is not something to try at home, the furnace exhaust contains dangerous carbon monoxide.
What do you think will happen? Check it out! We’ve put a plastic flue pipe onto a gas furnace and run 500 degrees into it – simulating the heat of a low-efficiency furnace. So, understandably, these flue types are NOT interchangeable.Ĭheck out the video where we run a test to show you the importance of matching your furnace exhaust pipe to your furnace type. Plastic pipe is only rated to about 212 – 250 degrees Fahrenheit.Ī 92% or higher furnace produces condensation as a by-product and would rust the metal pipe, creating holes and then letting the exhaust. But chimney experts and draft measurements show that in a rectangular flue not all of the cross-sectional area is equally effective in developing draft. Just muliplying these dimensions together (6.75 x 6.75) 45.56 sq.in. A metal flue pipe is built to withstand that level of heat and won’t melt, but the plastic PVC pipe is not. For example an 8' x 8' square nominal clay chimney flue tile liner has inside dimensions of 6 3/4' x 6 3/4'. This is important because an 80% furnace will put out exhaust at about 500 degrees Fahrenheit through the flue pipe. If you have a 92% or higher efficiency furnace than you should have a plastic flue pipe. They usually vent out through a wall of the home, at least 12 inches above grade or above the anticipated snow level. If you have an 80% efficiency furnace, then you need a metal flue pipe. The flue gases from a condensing furnace can exit through a PVC, ABS, or CPVC pipe because of their low temperature (around 100☏ or less). For more on this see our video: What is AFUE? 1-48 of 122 results for 'oil furnace draft control' RESULTS Price and other details may vary based on product size and color. and shuts depending on the strength of the negative pressure (draft) in the chimney. (Furnace efficiency is also known as AFUE. Barometric Draft Controls, Wood Coal Stove Accessories, Products, 5.
Standard Efficiency furnaces produce heat at 80% efficiency while high efficiency gas furnaces produce heat at 92% - 96% efficiency. Furnace exhaust is dangerous and so having the right furnace exhaust pipe is important.ĭifferent types of furnaces require different types of flues. It’s good to have an understanding of what they are and why they’re important … and how they match to your furnace efficiency.Ī furnace flue pipe (also known as a vent pipe or simply as a flue), vents the exhaust from your furnace to the outside of your home. Furnace flue pipes may not be something you’ve thought about before, but they’re an important part of your gas furnace system. 6 flue 28.27 square inches 8 flue 50.27 square inches Total 78.
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