Does a High Efficiency Furnace Need a Fresh Air Intake?

With the constant evolution of furnace technology coupled with the architecture of modern homes, whether or not to have a fresh air intake is confusion to many homeowners. Are fresh air intakes absolutely necessary today? And, if so, what is its actual function?

Furnaces require a fresh air intake since they are built to push air out of the house. By installing a fresh air intake, you can be rest assured that your furnace’s combustion will not compromise your home’s air quality or warrant frequent Lennox furnace repair near me. Read on to know what an air intake means and why it is so essential for maintaining the efficiency of a furnace.

Fresh Air Intake 101

As the name indicates, a fresh air intake is built to draw in fresh air into your home from the outdoors. In most cases, a fresh air intake is a simple duct that runs from a vent situated on the outdoors into the room where the furnace is located. The number of such intakes and locations tend to vary in different homes based on building codes of the city.

Why Is a Fresh Air Intake Important for All kinds of Furnaces?

A furnace needs plenty of oxygen to function smoothly. This means it needs as much fresh air as possible. A fresh air intake, gives your furnace the air it needs to work. In the absence of a fresh air intake, your furnace will eat up the air in its immediate vicinity. In order to understand the importance of a fresh air intake, it is important that you know how different kinds of furnaces work.

Standard-Efficiency Furnaces: Standard efficiency furnaces that are also known as conventional furnaces have an AFUE rating of 80. This means that standard efficiency furnaces lose about 20% of the natural gas energy that could be utilized for heat in the process of combustion due to venting.

These furnaces draw air from their immediate surroundings which mean that your room will be stripped of fresh air which results in negative pressure. Unless these furnaces are fitted with a fresh air intake, these furnaces will draw air from your home. By installing a fresh air intake, your furnace will draw air from the exterior. This negatively impacts the indoor air quality as air is sucked from crawlspaces and attics laced with contaminants.

High-Efficiency Furnaces: Also known as 90% furnaces, high efficiency furnaces have an AFUE rating of 90. This means that they lose only 10% of the natural gas energy that could be utilized for heat. High efficiency furnaces have a special built in the pipeline. This line runs from an exterior vent to the combustion chamber of the furnace which is sealed. These furnaces also feature a vent on the outside of your home that helps in disposing gases that are produced when the furnace is working. This goes to say that high efficiency furnaces have an inbuilt fresh air intake and do not use the air inside your home. They are designed to draw air from the outdoors. That said, you will still benefit from installing a fresh air intake as these intakes improve indoor air quality and also wick excess moisture.

Bottom line: Fresh air intakes are an absolute necessity for any home that has a furnace. You will do well at installing a fresh air intake, whether you own a standard or high efficiency furnace. Installing a fresh air intake is quick and easy and does not cost a fortune. All you need to do is look for a reliable Lennox furnace service near me to install the fresh air intake for you. Contact Arnold’s Air Conditioning of South Florida if you are looking to install an air intake for your high efficiency furnace. Call us today at (772) 210-1415.