Why a Gas Furnace Dries Out Your Homes Air and How to Fix It

There’s a reason why air appears drier during cold weather than in the summer. That’s since warmer air retains extra moisture, or humidity, than colder air. 

The same is true inside your the U.S. house. Starting your gas furnace makes your house feel warmer but can also dry out the indoor air. Dry air can carry a whole host of ailments, including dry skin, cracked lips and make you more susceptible to getting sick. 

Here’s why your gas furnace dries out your house’s air and what you can do to counter it. 

Your Furnace’s Combustion Procedures are a share the Issue 

The fuel your furnace consumes isn’t the source responsible for making your residence’s air feel dry. Rather, it’s the combustion process. 

There are two different kinds of gas furnaces, standard and high efficiency. With an older standard furnace, you can notice light from the burners when it’s working. A newer, high-efficiency furnace is tightly sealed. 

A standard furnace, also known as an atmosphere furnace, pulls air from inside your house to combust. Because the furnace continuously depends on air to burn, it will also use cold, dry air from outdoors, which in turn lowers your home’s humidity. 

High-efficiency furnaces, also known as a sealed combustion furnace, are used for keeping your humidity even. They draw all their combustion air from outdoors, but it stays trapped inside the sealed furnace. As an added advantage, they keep your home more comfortable while using less energy. Switching to an ENERGY STAR® furnace from an old furnace can save you as much as 40% on heating costs, according to Lennox®. 

In addition to combustion, cold air also naturally drifts into your house during the winter. Decreased humidity means the air will snatch moisture quickly from your skin, lips, nose and throat. It also causes static electricity. 

How to Stabilize Humidity in Your Residence 

Using a humidifier. While a portable humidifier can only make one room pleasant at a time, a whole-house humidifier will spread that comfort across your residence. 

These are just a couple humidifier benefits you’ll get when you install a whole-home system. 

Improved Health During Cold and Flu Season 

It’s no surprise winter is the worst time for colds, flu and other sicknesses. That’s because you’re more likely to become sick when your nose and throat are dry. Under certain airflow conditions, air at the correct humidity level can also resist the spread of some viruses. Also, it can combat year-round allergy symptoms. 

Soothes Dry Skin 

If you have consistent dry skin or eczema, you recognize just how aggravating those conditions can be during winter. Getting a whole-house humidifier will help your skin keep more moisture. 

Enhanced Sleep 

Preserving your bedroom at the ideal temperature and humidity level will keep you cozy at night. It can also help with loud snoring, since your throat and nose will be better hydrated. 

Defends the Wood in Your House 

Cabinets, flooring, furniture and basically anything in your residence that’s wood suffers when humidity is too low. This is because of the fact dry air draws moisture from the wood and causes it to fracture. Balancing your home’s humidity at the right level will keep your residence’s furnishings looking their best. 

Little Maintenance Needed 

Between consistent filter changes and continuous refilling, portable humidifiers expect a lot of upkeep. A whole-house humidifier only needs a tune-up about once a year, which can be done along with your furnace tune-up. 

A steam humidifier has the smallest amount of maintenance since it doesn’t require a pad. It holds water in a canister and boils it into steam that gets moved through your ductwork. Because it’s independently powered, it can run when the furnace is off. 

Request Your Free Home Comfort Consultation Today 

If your home’s air feels less than pleasant during colder weather, Service Experts Heating, Air Conditioning & Plumbing can help. Call us at 866-397-3787 to arrange a free home comfort consultation. There’s no pressure, just free Expert recommendations on how you can balance your house’s humidity at just the right level. And, like our other services, our work is supported by our well-known 100% Satisfaction Guarantee for one year.* 


*Not applicable to the Advantage Program. See your signed Advantage Program Agreement for full details and exclusions. 100% Satisfaction Guarantee is subject to certain restrictions and limitations as set forth in the applicable Terms and Conditions. 

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