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

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

The same is true within your the U.S. home. Using your gas furnace makes your house feel warmer but can also dry out the indoor air. Dry air can bring a whole host of ailments, including dry skin, cracked lips and make you more likely to get sick. 

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

Your Furnace’s Combustion Process is a Portion of the Issue 

The fuel your furnace consumes isn’t the culprit responsible for making your house’s air seem dry. Rather, it’s the combustion process. 

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

A standard furnace, also known as an atmosphere furnace, pulls air from inside your residence to function. Because the furnace consistently uses air to burn, it will also draw in cold, dry air from outdoors, which in turn lowers your home’s humidity. 

High-efficiency furnaces, also referred to as a sealed combustion furnace, are best for keeping your humidity steady. They draw all their combustion air from outside, but it stays trapped in the sealed furnace. As an extra perk, they keep your home more cozy while using less energy. Moving to an ENERGY STAR® furnace from an old furnace might save you as much as 40% on heating costs, according to Lennox®. 

Besides combustion, cold air also naturally moves into your residence during cold weather. Reduced humidity means the air will snatch moisture rapidly from your skin, lips, nose and throat. It’s also to blame for static electricity. 

How to Stabilize Humidity in Your Residence 

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

These are just a small number of humidifier benefits you’ll acquire when you put in a whole-home system. 

Improved Health During Cold and Flu Season 

It’s common that cooler weather is the worst time for colds, flu and other sicknesses. That’s since you’re more likely to end up sick when your nose and throat are dry. Under particular airflow conditions, air at the specific humidity level might also hamper the spread of some viruses. Also, it can weaken year-round allergy symptoms. 

Eases Dry Skin 

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

Better Sleep 

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

Protects the Wood in Your Home 

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

Little Maintenance Required 

Between steady filter changes and constant refilling, portable humidifiers rely on a lot of upkeep. A whole-house humidifier only needs servicing about once a year, which can be completed along with your furnace tune-up. 

A steam humidifier has the smallest amount of maintenance since it doesn’t use a pad. It retains water in a canister and boils it into steam that gets distributed through your ductwork. Because it’s independently powered, it can work when the furnace isn’t running. 

Book Your Free Home Comfort Consultation Today 

If your house’s air feels less than comfy during the winter, 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 advice on how you can balance your home’s humidity at just the right level. And, like our other services, our work is supported by our famous 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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