304 North Cardinal St.
Dorchester Center, MA 02124
304 North Cardinal St.
Dorchester Center, MA 02124
How To Measure For A Chimney Sheep? Get a tape measure. If you have a round flue, measure the diameter. If you have a round flue, you want a round sheep that is an inch or so larger than the flue. If you have any other shaped flue, measure the depth and width of the nearest narrowest part.28 Sept 2016
What size Chimney Sheep do I need? The Chimney Sheep needs to be an inch or two bigger than the opening in order to hold itself in place. The wool is compressive so it will squash to fit a range of shapes and sizes. And it can be trimmed down a little with sharp scissors if necessary.
Does a Chimney Sheep cause damp? No, it does not. Chimney Sheep® are made from Herdwick wool which is naturally breathable and will allow moisture to permeate through.
Are Chimney Sheep any good? A few customers have asked whether there are have been any comparative reviews between Chimney Sheep™ and Chimney Balloon. The Chimney Sheep is easy to insert and easy to remove, and being made of sturdy Herdwick wool it is very durable and will last for many years.
When inserted into an open chimney flue, the woollen pad of a Chimney Sheep® compresses to fit perfectly in flues of all shapes and sizes. A Chimney Sheep® stops warm air escaping through an open chimney and prevents cold air being pulled in via other gaps, helping a property retain its heat and feel more comfortable.
Keep warm air in and cold air out with Chimney Balloon ®
The Chimney Balloon effectively blocks the chimney, stopping warm air from escaping and stopping cold air from getting in.
Never, under any circumstances seal off the top of the chimney, due to the risk of unintended use of the fireplace as cautioned above. By keeping the cap on the chimney but sealing the fireplace, enough air can circulate to avoid unwanted condensation issues. This is the WRONG WAY to Block a Chimney!
The Chimney Balloon is made of extraordinarily tough plastic. But when it gets hot, it will just shrivel and fall into the grate. Other inflatables are made of PVC which expands and gives off fumes – the Chimney Balloon is by far the safest!
A damper should be your go-to draft stopper if your fireplace has one. A chimney balloon is simply a form of balloon that you can blow up within your chimney to provide a tight seal. A chimney balloon can be a good choice if your fireplace doesn’t have a damper.
They are also prone to puncturing. We have also heard from people who claim chimney balloons have led to damp. Chimneys are there for ventilation so it figures that if they are blocked, your house doesn’t breathe like it should. This can lead to condensation and mildew – not nice.
Draught proofing chimneys with chimney balloons
You can use a chimney balloon. A chimney balloon is essentially a balloon that you inflate in your chimney that creates a snug fit, thereby preventing hot air escaping up out of the chimney or cold air dropping down it, helping to prevent draughts in your home.
As a general rule, the diameter of the chimney should match the flue collar on your wood stove. A 6-inch stove requires a 6-inch flue. In most cases, a step up is also fine. For example, you could vent a 6-inch stove into an insulated chimney that is 8 inches in diameter.
The most common of these being the 2 foot, 10 foot, 3-foot rule. Roughly this means that a chimney should be 3 feet higher than the point it passes through a roof, while also being at least 2 feet taller than any part of a building that’s within 10 feet of the chimney.
The Chimney Sheep is designed for open solid fuel fireplaces and chimneys. If the gas has been disconnected then a Chimney Sheep can be fitted in the flue but otherwise we advise against it. For customers with gas fires we recommend the Chimney Balloon.
The plastic Chimney Balloons can be blown up manually and are inserted into the throat of the chimney. However, while they were easy to use, these widely-used inflatables don’t actually perform well in preventing air leaks and helping you maximise your home heating and cooling!
The higher the chimney stack, the more draught will be generated. There needs to be a route by which outside air can enter to replace the volume being lost up the chimney. While this can sometimes be provided by air leaking in through doors, windows etc., it is often necessary to fit a purpose-made air vent.
When a fire is lit, the chimney fills with hot gasses which then rise because they’re less dense than the outside air. This pressure differential then draws air from the room into the fireplace to be used for combustion. This drawn air is what’s referred to as the draft.
Pillow. The cheapest and most basic solution – an old pillow. Although it’s cheap, the pillow is prone to sucking up moisture, causing mold and blocking the chimney from breathing. It also has nothing to remind anyone lighting a fire that it’s there, and has passed no fire safety tests.
The Chimney Balloon is designed to inflate and push against all four walls of the chimney, holding itself firmly in place. There is a small vent in the side of the product which allows some airflow, permitting your chimney to “breathe”. This means each size will fit a greater range of chimneys.
Fireplace and chimney basics
The path for smoke also is a path for air. When a fireplace isn’t in use, cold air from outside can come down the chimney into the home, and warm interior air can escape up through the flue.
#1 The Simplest Cause of Chimney Leaking: Rain Going Straight In from the Top. Chimneys without covers get a lot of rain falling straight down into them. A chimney cover makes sense to most people. Not only does it keep the rain out, but keeps birds, animals and debris out.
A chimney needs a vent, not just at the top (provided by the cap) but also at the bottom. The air flow helps keep the chimney dry and ward off any condensation forming inside the stack. If there is no air flow, condensation will form inside the stack and will be soaked up by the old coal soot.
When fitting into an existing fireplace, be aware that heat can be lost up the chimney, reducing efficiency, and up-draught can affect the operation of the fire. To prevent this, it’s recommended that the chimney flue is blocked off – a chimney balloon is a good way to temporarily block up your chimney.
If your damper is warped, rusted or otherwise damaged, cold air in the upper flue is going to get past it. These devices are placed above the throat damper and inflated to completely block air from coming down into your fireplace. Balloons are designed to be used only when a fire isn’t burning.
Turn off all other air vents in the same room as the fireplace when you are using it. If your house is less than 25 years old, it may be sealed too tightly, so open a window when a fire is lit. You may want to consider increasing the height of the chimney to get more draft.