Can High Efficiency Furnace Vented Through Chimney

Conventional furnaces use only one they use a two stage process.

Can high efficiency furnace vented through chimney.

In contrast modern high efficiency condensing furnaces exhaust much cooler gasses and need only plastic pipe materials such as pvc cpvc or abs for their exhaust vents. I have not heard of high efficieny only lasting 10 13 years. These are connected to the furnace and routed out to the side of your home. High efficiency furnace venting uses two heat exchangers.

In standard furnaces all these combustion gases including carbon monoxide are usually vented through chimneys or flues. That depends on whether you have a standard efficiency or a high efficiency furnace. The exhaust gas is too cool for it to rise. But it is not advisable.

Additionally how do you seal furnace exhaust to chimney. The efficiency rating of a furnace is called afue annual fuel utilization efficiency. I think don t it is possible to vent a 95 efficiency furnace up through an existing chimney. That s because the combustion byproducts are in a gaseous form so the gases can float up through the flue pipe and out of your roof.

Can your new furnace be vented through the chimney. They are vented outdoors horizontally through a wall by a small plastic pipe. In fact we almost always recommend against it if you have an older chimney and a new high efficiency furnace. You may want to look into simply having the pvc intake and exhaust pipes for the furnace rerouted to go through a sidewall in your basement to the exterior.

To combat this issue a high efficiency condensing furnace uses pvc pipes to extract the acidic water from your home. For these reasons exhaust from a condensing furnace should never be vented through a standard chimney. Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys. Brush away any dirt or dust from the area around the furnace vent that you will be sealing.

I believe high efficiency furnances must be vented horizontally through a wall. They include a second heat exchanger that reclaims additional heat from the system s exhaust gases before they are vented away. Condensing gas furnaces achieve their high levels of efficiency by adding another step to the fuel burning and venting process. The heater pipe is normally level and moderately short.

Sometimes we see multiple appliances using the same flue vent system for multiple appliances but this isn t always a possibility. You need to make sure your furnace is venting properly. The condition of the chimney is a factor because new super efficient gas furnaces do not vent up the chimney. The venting system is installed at the same time as your high efficiency furnace.

If your furnace has an afue rating of 90 percent or above it will have a flue pipe that goes out of the side of your house. Also the acidic elements in the exhaust can damage unprotected chimney bricks and mortar. How new furnaces vent. I would be very leary of a hvac contractor would not do this.