Can you vent a high efficiency furnace out of a chimney?

All furnaces that utilize oil, fuel, or gas to run need ventilation. Your gas heater utilizes ignition to create heat. However, the procedure likewise prompts the improvement of some entirely terrible side-effects, including carbon monoxide—a risky, harmful gas. Often, we can see various apparatuses utilizing a similar vent system. But in reality, if you have an old chimney and new highly-efficient furnace, you are not encouraged to do so. Can you vent a high efficiency furnace out of a chimney? Yes, you can. But it is not advisable.


As usual, new furnaces vent through a pipe that goes from the unit straight out the side of the home. The heater pipe is normally level and moderately short. New furnaces work to be exceptionally efficient. It means that they don’t emit a great deal of heat during ventilation. And since there are fewer byproducts to vent, your chimney might be excessively wide, which could bring about improper ventilation. This permits water vapor to develop in the fireplace which can do permanent ruin.

Aside from having unfit size, there are other issues why you mustn’t vent byproducts of your furnace through your chimney. Mostly, the chimneys in our homes are very old. That is why they no longer have the correct lining to vent a furnace.

With everything taken into account, construction standards may keep professionals from utilizing your chimney to vent a furnace at any rate. The standard channeling used to ventilate new heaters ought to do fine.

Natural Gas Furnace Vent

If you are considering having a petroleum gas heater at home, know about the significance of high efficiency furnace venting. Byproducts from the combustion process generate from burning of natural gases. For wellbeing and security reasons, these byproducts must be rid from the heater out of your home.


Ordinary gas furnaces will vent the risky burning gases through a basic vertical fumes system connects to the furnace. The exhaust system normally uses metal venting, regularly directed into a chimney. It is to deplete the burning gases in the furnace fire chamber. Notwithstanding, these burning gases contain leftover warmth that is lost through the ventilation. You can catch that warmth with a high productivity condensing heater.

A high proficiency condensing heater can accomplish effectiveness evaluations of 90 percent or above. It utilizes a venting framework to remove that warmth before venting. What is vented is a lingering destructive condensate of water and carbon dioxide. This lingering fluid is exceedingly acidic. It will destroy the standard venting gear that is utilized in traditional gas heater ventilation frameworks.

To avoid this issue, highly-efficient furnace venting requires PVC pipes to expel the acidic condensate from your home. These pipes connect with the heater and outside. This high effectiveness venting framework is great for your new heater. The PVC channels are for air consumption, fumes gas, and to expel the destructive buildup brought upon by the burning procedure.

Highly-Efficient Furnace Vent: Other Aspects of Venting


A highly-efficient condensing furnace has an electronic start instrument. It is a hot surface start framework that uses an electronically controlled resistance warming component, like a light fiber. The hot surface of the warming component touches off the gas burner. It gives preferable execution and higher wellbeing over a pilot light. It additionally gives power-saving funds because of its unrivaled working productivity.



Again, a high-proficiency consolidating heater has exceptional venting and condensate waste necessities. It likewise has extraordinary warmth exchanger innovation that can concentrate heat from the fuel ignition process for a longer duration. It concentrates warmth even until the point where the burning fumes gases cool and dense. The subsequent buildup dribbles out of the heater’s warmth exchanger and keeps running into a floor drain. The low-temperature leftover pipe gases vent outside through unique plastic funnels.



Your contractual worker should avoid potential risk to ensure all ventilation frameworks are appropriately set and working accurately. One of the most significant security highlights of gas-consolidating frameworks is sidewall venting.

It requires having separate vent pipes on a level plane. It has the goal to vent outside through the wall of your home. These ventilation funnels ought to be separated from the heater ignition chamber. Then, it must be airtight to avoid having burning gas spillage. They important so any condensate in the channels depletes in reverse without solidifying and depletes into the floor drain.

Not properly ventilation your highly-efficient condensing furnace can show two security dangers. In the first place, the gas byproducts can contain carbon monoxide that could escape into your home. Except if the ventilation channels are impermeable. Second, inappropriately venting the fumes through a chimney can harm the chimney itself along with its liners. That is on the off chance that it aggregates and stops. Likewise, the acidic components in the fumes can harm unprotected chimney blocks and mortar. Hence, it is not good to vent exhaust from a condensing heater through a chimney.


A highly-efficient heater venting utilizes two warmth exchangers. Ordinary heaters utilize just one. They utilize a two-arrange process. In the main stage, gas burns to warm the primary heat exchanger. After that process, the subsequent stage starts. In the subsequent stage, the second warmth exchanger concentrates warmth out of the hot fumes gasses. This warmth extraction procedure cools the fumes gases to the point that the water vapor in the fumes gas turns into liquid. Any subsequent gas results are cool enough to vent them outside through a PVC pipe.

The Vent Maintenance

Change the air filters consistently.

On the off chance that you have pets, you ought to do it more often. A basic $1 fiberglass filter will ensure the blower and its engine. You can likewise purchase increasingly costly filters to filter through smaller particles. Make sure you check the proprietor’s manual for the manufacturer suggestions. The more dominant filter can put undue strain on your heater by limiting wind stream excessively. Change the arrival return air channels. If you have a permanent kind of filter, follow the company’s guide in cleaning it to remove dirt.

Ensure ventilation channels and condensate drains are unhampered.

Keep the vent and channel funnels open. Check them routinely and get rid of any blockages.

Timetable standard check-ups with an expert HVAC contractor

A highly-efficient condensate heater can save you cash on your warming bills. Nonetheless, you have to ensure that the framework is working appropriately. In the event that the condensate from a high proficiency heater breaks out of the PVC funnels, it’s a problem. It could harm your home and you may not know about it until the harm ends up critical. The same thing goes when the channels are not depleting the condensate effectively. An expert HVAC specialist will guarantee frim verification and installation on your venting pipes. They will likewise examine your system and deal with any potential or minor issues before it’s too late.

High-Efficiency Furnace Vent: What makes it Unique?

At the point when your heater burns petroleum gas to warm your home, it produces combustion gases as results.  And it should immediately vent out of your home.

With a traditional heater, under 90% productivity, combustion gases pass through a vertical vent that connects to your system. On the other hand, a highly-condensing heater makes further use out of those gases before they leave your home.

Moreover, the byproduct gases that vent outside by a regular heater still contain a specific measure of warmth. On the other hand, a highly- efficient condensing heater extricates that additional warmth with a second warmth exchanger. Then, the rest of the gases turn into a blend of carbon dioxide and water.

High-Efficiency Furnace Vent: How does it work?

The condensate that a highly-efficient condensing heater left contains acidic water that would harm ordinary vents. Thus, rather than utilizing a regular vertical venting framework, a high efficiency system utilizes PVC pipes. These pipes connect with your heater and lead out of the side of your home.

High-Efficiency Furnace Vent: How will you know if they function properly?

If the condensate from your high proficiency heater were to break out of the PVC funnels, it could make harm your home. The same as through when the channels are not draining the condensate accurately. That is the reason it’s critical to work with an amazing contractual worker. He is the one who will guarantee firm verification and proper installation of your venting pipes.

The Bottom line

One of the most perceptible parts of highly-efficient furnaces is that it has an alternate sort of venting framework than an ordinary heater. In case you’re contemplating having such proficient furnaces in your home, venting through a chimney is not advantageous. It proves to be disastrous instead. In having an energy star awardee furnace, you may have a few inquiries concerning its extraordinary style of venting. And today you have learned how a high proficiency heater venting functions. And also, on how you can guarantee that your framework is appropriately venting the combustion gases out of your home.



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