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  • Writer's pictureJohn@LiteHouse

Venting Issues with High-Efficiency Furnaces

Updated: Nov 16, 2022


If you have a high-efficiency furnace, there's a good chance that venting issues are to blame for any problems. The reason is simple: more efficient furnaces generate more heat than their predecessors. This leads to higher pressures inside the furnace and even more stress on the seals around those vents (and elsewhere).

When it comes to furnaces and vents, the two go hand in hand. A vent is a duct system that allows your furnace to bring fresh air into your home while removing excess heat and moisture. In addition, ventilation systems are required by building codes as they help prevent carbon monoxide poisoning and improve indoor air quality.

In other words, if you don't have a working vent or if there's an issue with it, then your furnace won't be able to do its job properly—and this could lead to some serious problems down the road!

Compressed Air

Compressed air is primarily caused by clogged filters, but it can also be caused by a pressure regulator that's not set correctly. When the furnace runs, it pulls air into the system and then compresses it internally before sending that air through your ductwork. This compressed air can cause problems with your furnace if there's something obstructing this process.

If you have a clogged filter or a pressure regulator issue, compressed air can cause several issues:

Your furnace will run longer than necessary because of a lack of airflow—this could lead to higher electricity bills or even an overworked motor on the furnace itself.

  • The cycle time for your HVAC system will increase. This means that during every cycle (and there are many cycles per hour), there isn't enough time for everything to happen properly in order for things like heating or cooling to occur properly—which may result in either too little heat being produced at times or too much heat being produced at other times depending on what kind of HVAC system you have installed in your home or business facility...

Condensation Problems with Direct-Vent, High-Efficiency Furnaces

If you have a direct-vent, high-efficiency furnace, you may have noticed that your furnace vents are dripping condensation. This is because of the very efficient nature of these furnaces.

When air enters your home through a duct system and heats up, it cools down as it leaves through the venting system. If there isn't any moisture in this cooled air, condensation should not be an issue (though it will still happen). However, when moisture from inside your house mixes with hot exiting air from your ducts, it creates water droplets on the interior surface of your venting system—and that's where things get problematic.

Condensation can cause damage to any part of your furnace and even lead to mold growth if left unchecked for too long

Let a Cincinnati Home Inspector Help You Avoid Problems with Your Furnace Vents.

A Cincinnati home inspector can help you avoid problems with your furnace vents. They are trained to help you understand the risks and potential solutions of having a poorly-vented furnace. Home inspectors can also identify potential problems with your furnace vents, which could lead to a significant amount of damage or even fire if not addressed immediately.

If you believe your venting system needs an inspection, contact us today!


In the end, it’s always better to have a professional inspect your furnace vents before you buy. A home inspector can help ensure that any potential problems will be caught before you invest in a new house or apartment and end up with a problem that would cost you thousands to fix.

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