How To Install A Wood Stove Chimney Through A Flat Roof' title='How To Install A Wood Stove Chimney Through A Flat Roof' />Chimney Airflow Problems Chimney Draft Issues.Understanding chimney draft problems is not necessary for most people.Usually, if you notice smoke not rising from your chimney, you can call on a professional to fix the issues.Draft problems can cause you problemsThis information is for those who really like to understand it may be too much information for many people.Ill do my best to keep it as interesting as it can be.If youre a do it yourselfer or the owner of an old home, youll probably get a lot of out of it.Interested in diagnosing a smokey fireplace Learn about chimney draft and common chimney air flow issues from Highs Chimney Service.Hello I have a metal building that I would like to install a wood burning fireplace in.The metal roof panels are from Mueller and they are the R profile.They can be.Pellet stoves are ideal for warming smaller rooms or an area of a room.Woodburning and natural gas stoves require a vent pipe that exhausts fumes to the outside of.Understanding Chimney Draft Issues.To understand the problems, you need to understand what draft is.Draft is what we name the effect of how the air flows up the chimney.Its measured in inches of water column.Draft then is the combination of volume, speed, and pressure of the flue gasses.And temperature of the gasses comes into play here as well.Bv.stove_pipe01_1496.jpg' alt='How To Install A Wood Stove Chimney Through A Flat Roof' title='How To Install A Wood Stove Chimney Through A Flat Roof' />For matters of this discussion, chimney draft is usually thought of as the speed at which the vented gasses travel up the stack, or pressure of the gasses.This can also be referred to as the stack effect.A common question might be how strong is the stack effect Good draft conditions mean that the vented gasses are traveling up the chimney quickly rather than slowly or not at all.How Does Chimney Draft Work The reason smoke or other flue gas goes up the chimney at all is because of the vacuum in the chimney.The question you should ask now is a vacuum relative to what The general answer is that its relative to the air in the house.How To Install A Wood Stove Chimney Through A Flat Roof' title='How To Install A Wood Stove Chimney Through A Flat Roof' />Dont read too much into that because it gets tricky for example, how does replacement air get into the house because the house environment is a relative vacuum to the outside.Yet the inside of the house is not a vacuum compared to the chimney.Lets keep this simple and just talk about the chimney.The pressure in the chimney is typically less than that inside the house.Thus, the draft effect is caused by air inside the chimney being pushed up the chimney by the house air.And why is there a difference in pressure in and out of the house, or in and out of the chimney There can be a few reasons, but the biggest and most important reason is the temperature difference from one place to another.Remember that when air is heated it expands The same amount of air occupies a larger space, or you could say the same amount of space has less air fewer molecules of air.The air outside the house in the winter is colder and heavier than the warmer air in the house.It pushes its way into the house or is it pulled, depending on how confused you want to be.The air in the chimney just came from a fire so its really hot and expanded and being pushed up the chimney to the cooler air outside where warm air rises, right Thats buoyancy.Problems occur when these processes dont happen correctly.General information about chimney roof flashing.Below are a few examples of masonry work chimney flashing kits Ive made Click on the thumbnails for a larger.Diagnosing Chimney Draft Problems.Draft is measured with a pressure meter that has a probe which goes into the smokepipe.The meter should register a negative number, and generally speaking for residential heating appliances that number would range between 0.Zero or a positive number means the gasses are not going up the chimney.And too large a negative number can have its own set of consequences but that isnt usually the problem.Mostly a draft problem means the gases are not going up the flue, this is merely a minor chimney repair.Causes of Draft Problems.Chimney Airflow Issues.Now there are other reasons for draft problems.One is called Dynamic Wind Loading.DWL.DWL is caused when the wind blows on one side of the house and causes a positive pressure, and creates a corresponding negative pressure on the other side of the house.If the windward side of the house is tight and the lee side negative pressure side isnt, the vacuum resulting from the wind can suck air out of the house.And the most likely source of that air is the chimney itll pull down on the chimney, smoke and all and keep it from exiting your house Or if a gas furnace is being vented you wont see smoke but you still get the carbon monoxide.The way to deal with that is to tighten up the lee side of the house and then put in an outside air source.There are kits for that or you can just crack a window on the windward side of the house.Chimney Draft Issues Caused by Fans.If your ears pop when you turn on your kitchen fan, youll probably have chimney draft issues.The other large reason for bad draft is when chimneys have to overcome fans in the house.Kitchen fans, bathroom fans, radon fans.It doesnt take much of a fan to overcome a natural draft appliance such as a fireplace or woodstove Again, the best answer is to allow make up air into the house.The problem with that of course is that you dont want a draft across the floor and you hate to purposefully introduce freezing cold air into the very house youre trying to heat.Its a Catch 2. Tim Und Struppi Comic Ebook . I can tell you CO poisoning is a bad thing, and smoke in the house is a bad thing.You just may have to make some choices.Air Flowing Down Your Chimney.Finally, sometimes air actually blows down the chimney, but less frequently than youd guess its usually something else.But maybe your chimney is short and next to a larger part of the house or a bigger building.The same problem occurs if your house is located at the base of a mountain.If you have this problem, a Vacustack is a good solution if you cant raise the chimney to the proper height.How to Install a Pellet Stove Pipe Through a Wall Home Guides.Enlist a contractor to install the stove pipe where a wall has brick veneer.Pellet stoves are ideal for warming smaller rooms or an area of a room.Wood burning and natural gas stoves require a vent pipe that exhausts fumes to the outside of the building.Venting through the ceiling and roof can be costly and time consuming.But the average do it yourselfer can install a through wall vent using parts from a horizontal stove pipe kit.The kits include the necessary pipe, connector, collars and a horizontal round cap that attaches at the outside.Cutting the Holes.Fit the 9.Fit the other end of the pipe onto the exhaust flange at the top of the stove, and rotate the pipe so the open end of the elbow is pointing at the face of the wall.Work from a stepladder to mark the wall at a point that aligns with the center of the open end of the elbow, and set the pipe and elbow aside.Use a stud finder to locate and mark a stud in the wall at each side of the mark.Adjust the mark either way, as necessary, so its between the studs.Position the provided inside collar at the face of the wall, and center the hole for the pipe at this mark.Mark an outline of the hole on the wall, and set the collar aside.Cut the hole about 18 inch larger than the outline with a jigsaw, and remove the cutout portion.Cut any insulation in the wall with a utility knife, and move it away from the hole.Mark a point on the inside face of the exterior wall at the center of the cutout.Set up a cordless drill with a 6 inch long wood drill bit for wood siding.Use a 6 inch long masonry drill bit for stucco.Drill through the outside wall at the center mark, and go to the outside of the wall.Work from the ladder, and position the provided outside collar at the face of the wall.Center the hole for the pipe at the drilled hole.Mark the outline of the hole on the wall, and set the collar aside.Use a jigsaw to cut the hole in wood siding about 18 inch larger than the marked outline.Alternatively, cut the outline on stucco and wire lath with a grinder and a diamond blade disk.Installing the Stove Pipe.Work from inside, and fit the shorter, horizontal section of pipe through the wall until the inner end is about two inches from the face of the wall.Apply construction adhesive on the flat portion of the inside collar that fits at the wall, and slide the collar onto the pipe and against the wall.Dvdfab Blu Ray Copy 8 0 2 2 Exe on this page.Fit the lower end of the vertical section onto the flange at the top of the stove, and attach the open end of the elbow to the inner end of the horizontal pipe by snapping the connection together.Install a screw tip attachment in the drill.Attach the lower end of the vertical pipe to the flange with three of the provided self tapping screws.Drive one at the front edge of the pipe and another at each side.Move the the outside wall.Apply construction adhesive on the flat portion of the collar that fits at the face of the wall.Slide the collar onto the end of the horizontal pipe, and fit it firmly at the wall.Attach the horizontal round cap onto the end of the pipe by snapping the connection together.Things You Will Need.Stepladder.Stud finder.Jigsaw.Utility knife.Cordless drill.Grinder with diamond blade.Construction adhesive.Tips.Stove pipe kits vary with the manufacturer.Traditional kits have an inside and outside collar, while others have a wall thimble that installs in the wall.This type requires cutting the appropriate opening in both walls based on the size of the thimble.Refer to the instructions for installing the thimble.Obtain the stove pipe kit based on the desired height of the vertical pipe and the wall penetration at the inside wall.Depending on a particular installation, it may be necessary to use an adjustable elbow that allows you to run the pipe through the wall at an upward angle.While pellet stoves generate relatively low heat the pipes, make sure the outer end of the horizontal pipe is at least 1.Warning.Wear eye protection and a dust mask when cutting the holes in the inside and outside walls.About the Author.William Machin began work in construction at the age of 1.In 3.His hobbies include horses, motorcycles, road racing and sport fishing.He studied architecture at Taft Junior College.Photo Credits.
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