what to use around furnace vent into chimney
Do homework earlier considering eliminating the chimney
Hi! Nosotros've just renovated a '50s bungalow and have two ten-year-old gas furnaces venting through a chimney, even though at that place is no steel ductwork. I would similar to replace the chimney with something less intrusive. Can we vent the furnaces directly outside through the side of our home or do we accept to run new venting up through the roof? As well, what are the regulations for the blazon of venting required to replace this chimney?
Your questions give me the impression that you are looking for a way to eliminate the chimney. If in that location's a solution that will permit your heating appliances to be vented to a new location, what are your plans for the chimney?
Depending on where the chimney is located, y'all may gain extra space if you remove information technology. Withal, removing the chimney is a tremendous project and requires roof, ceiling, floor, and wall repairs too equally disposal of masonry products.
My other business is the blazon of water heater you have. Since almost homes with a gas furnace likewise have a gas water heater, I presume that y'all take a gas water heater. In most cases it vents into the same system as the furnace. If your water heater now vents into the chimney, information technology'south another appliance to consider every bit you programme your project.
The simple answer to your question nearly venting through the sidewall is that it depends on your appliances. Information technology appears from the way they are currently vented that you have fourscore-percentage efficient furnaces, and so check the installation manuals for sidewall venting options. If you don't take the owner's manuals, bring in a licensed serviceperson to appraise the state of affairs.
An pick to consider is a sidewall ability vent (induced draft fan). Basically, it's a fan located at the stop of the exhaust piping that mounts to the sidewall to better draft and pull the exhaust combustion products to the outside. On the exterior of the dwelling house, the vent hood is like in pattern to that of a clothes dryer vent hood.
I think this is more attractive than a xc-plus efficient furnace venting through the sidewall with two PVC pipes, especially if you want to maintain the integrity of the habitation's advent. An induced typhoon fan interlocks with the furnace organization so information technology turns on before the furnace fires. To learn more well-nigh this system and run across a diagram of an installed unit of measurement, go to www.tjernlund.com/gassidewall.htm.
Regarding the type of frazzle piping to utilise, I believe an explanation of the difference between 80 percent and 90-percent-plus efficient furnaces will answer your question.
If the furnaces take typhoon hoods, they are about 67% efficient and can be vented with Type "B"-vent or into a masonry chimney. If the furnaces practise not take draft hoods, but are fan-assist draft furnaces, they are from mid 1980s or later on and are 78 to 83% efficient and need to exist vented with Type "B"-vent or into a metallic lined masonry chimney. If the furnaces have 2 plastic pipes coming out of the top of the furnace, they are ninety% + efficient condensing furnaces and the plastic pipes bring in outside combustion air and vent the products of combustion to the outside.
Unremarkably the ninety% + efficient furnaces tin can be vented out the sidewall or through the roof; the other furnaces vent through the roof unless there is an induced typhoon fan installed on the sidewall. In any case the venting needs to exist installed according to the furnace manufacturer's installation instructions, or with an induced draft fan, the venting will follow the induced typhoon fan manufacturer's installation instructions to allow sidewall venting.
If you decide to remove the chimney completely and vent in the aforementioned location using B-Vent, you can leave it as is or build a chimney hunt around it, which volition allow you lot to terminate the exterior of the chase any way you want.
If you vent through the sidewall and carry the B-Vent upwards along the side of the dwelling house, you lot'll need to frame a hunt effectually it and insulate information technology to limit the possibility of condensation within the pipe. Again, the exterior of the chase tin can be finished to complement the home'due south exterior.
In your case, yous can handle the demolition portion of the project such equally removing the chimney and repairing the roof, interior walls, etc. Nonetheless, in Calgary homeowners are not allowed to work with appliances that involve natural gas. Permits for gas work are required and the work must exist done by a certified mechanical contractor.
Also, the building and mechanical codes need to be followed.
There's no simple answer. Y'all'll have to do some homework and work through a controlling process to determine what's of import to you. Adept luck with your project!
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Question answered past Leon A. Frechette.
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