For optimal use and safety, a liner is needed when installing a new heating system, furnace, boiler, or water heater. Local codes and the International Fuel Gas Code require proper venting and chimney liners for flue gasses to be vented into the outdoor atmosphere..
In respect to this, do I need a chimney liner for a gas furnace?
Chimney liners aren't just a good idea – they're required to help maintain the proper performance of your chimney. Gas-fired appliances need to vent to the outside to avoid a build-up of carbon monoxide. In the past, gas furnaces and water heaters used the home's chimney to provide adequate ventilation.
Likewise, why would I need a chimney liner? A chimney liner protects the chimney liners masonry and joints from the heat of the fire. It also protects the chimney from the corrosion that can be inflicted by the acidic flue gases that emanate from the fire. By preventing overheating and corrosion, a chimney liner ensures a longer life for your chimney.
Similarly, you may ask, do you really need a chimney liner?
However, if you're not using your fireplace and your chimney acts solely as a vent for your furnace or water heater, you may not need to have a liner installed. Homeowners with gas or electric inserts most likely do not need a new liner because those types of fuel don't produce enough heat to damage a masonry chimney.
Does a chimney liner need to be insulated?
There is NO Building Regulation that says you must insulate around a flexible flue liner, within a chimney stack. By keeping out the cold and maintaining the heat within the flue, Vermiculite Granules and FlexWrap or Rockwool Insulated Tubes will keep the hot gases rising for an efficient draw on your stove.
Related Question Answers
How do I know if my chimney needs a new liner?
Unfortunately, there are usually no obvious signs of chimney liner damage. In some cases, you may notice broken masonry in your fireplace. The debris could be bits of deteriorating flue liner that have dropped into the firebox.How do I know if my chimney needs a liner?
How can I tell if my chimney has a liner? You can have it inspected by a chimney professional; or, if you're able, you can go up on the roof and check it out yourself. If you look down into your chimney and see only bricks and no clay tile, it is not lined.How much does it cost to install a liner in a chimney?
For the average homeowner, having a chimney liner installed costs about $2,500. For more expensive materials, prices tend to average at $5,000 and could climb to $7,000. With an easy-to-install material like aluminum, the DIY cost of materials and equipment could be as low as $625.How much does it cost to install a stainless steel chimney liner?
The average cost of a stainless steel chimney liner is around $625 for a ready to install, 6″ x 25″ foot flue liner kit and DIY installation. Professional installation of the same chimney liner kit with insulation, is around $1,980.How much does it cost to have a chimney relined?
The cost of relining a chimney varies. Typically, the cost can be anything between $2,500 and $7,000. Ultimately the cost will be determined by the type of lining you would want to have installed.How long do chimney liners last?
The answer to this question depends on the type of chimney liner you have. Clay tile liners and cast-in-place liners typically last around 50 years. Stainless steel flue liners generally last for 15 to 20 years (though low quality liners may not even last for five).Do I need a liner in my chimney?
There are three principle reasons you may need a chimney liner: A) because your chimney has no clay tile chimney liner (older chimneys may not); B) the clay tile chimney liner is damaged; C) a chimney liner is required for optimal performance and safety because you are installing a new heating unit (stove or furnace)Why do gas ovens not need a flue?
Why do gas fires require a flue but gas cookers normally vent their combustion products inside the building? ALL gas-burning appliances need an adequate supply of fresh air to burn properly, and all produce a small amount of the toxic carbon monoxide gas in the combustion products. An exception is made for cookers.Can I install my own chimney liner?
Yes it can - and will! While having your chimney liner professionally installed can be more convenient but ends up being costly, averaging anywhere from $2,500 to $5,000. With our DIY Chimney Liner Kits you will have all the components needed to reline your chimney and you wont break the bank!Does a chimney need to be lined for a wood burning stove?
A chimney liner is obligatory if you are installing a woodburning stove, gas fire or open fire in a new build property to comply with Document J of current Building Regulations. A chimney liner may be necessary in an older property if the flue inside your chimney is no longer safe to use.Can you vent a hot water heater into a chimney?
When venting a gas water heater to a chimney, be aware that holes in the chimney can prevent a good draw on the water heater, causing downdrafts and presenting the risk of carbon monoxide poisoning. To avert this problem, you can vent the water heater to the largest hole in the chimney and cap the remaining holes.Can you use a log burner without a flue?
Yes. You can install a wood burning stove in properties without a chimney. Stovax has designed a twin-wall flue pipe system – the Stovax Professional XQ™ range – which allows rooms without chimneys to enjoy the benefits of a wood burning stove.How much does it cost to install a wood burning fireplace insert?
Inserts heat 1,000-3,000 sq. ft., depending on their size. You'll want to size your insert to the square footage you need to heat. Cost: $3,000-$4,000, including installation and a chimney liner.How do you mix vermiculite in a fireplace?
Vermiculite is a dry mix. You need to mix it with cement and water (like aggregate) to form a lightweight concrete. When mixed 5:1 with cement it forms a lightweight concrete perfect for forming the slope behind a fireback. 
