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How Does a Furnace Humidifier Work?

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A furnace humidifier is an essential component of your home. It provides you and your family the comfort and luxury you desire by providing the necessary warmth you need in a room to relax. Most of us tend to ask how does a furnace humidifier work? Well, don’t worry, we got you covered.  Read how return air ducts balance airflow in your HVAC system. Proper humidification in your home safeguards your home and provides warmth. With the required humidity amount in the surrounding air, you tend to feel comfortable and warm at generally low temperatures saving money and energy.  Furnace humidifies work to add moisture, and through the evaporation principle, distributes it. The source of water and the ductwork should be connected and mounted to the furnace’s hot air supply, humidifiers tend to work hand in hand with furnaces with the assist of other essential humidifier components;
  • The blower that produces the required air movement for evaporation to take place 
  • Humidistat allows you to control the humidity settings and turn the humidifier ON/OFF 
  • Water collector, of which may include the evaporation pad or the reservoir 
  • The water valve can be either afloat or solenoid. It dispenses water towards the humidifier to reach the required humidity level. 

Furnace Humidifier 

Also known as a whole-house humidifier, the furnace humidifier connects to the HVAC system. It moistens the surrounding air that the furnace distributes throughout your home.  They function by using freshwater, holding water in a reservoir, producing steam, and adding moisture to the airflow in the furnace. There are different furnace humidifier types of which include: 

Steam Humidifier 

The steam humidifier is the most efficient type, which requires very little maintenance. However, the initial cost of purchasing the steam humidifier is relatively high but beneficial in the long run. It heats the water and converts it to steam. The furnace will disperse the mist into the house at low speed.

Through-flow Humidifiers 

As opposed to reservoir humidifiers, through-flow humidifiers are more efficient and reliable. They also require very little maintenance and are moderately priced in the market. They work in a way that they rely on tapped water, coming from a water pipe and into the system, dripping water across a coated screen.  The through-flow humidifier functions so that while the model is on and running, the blower in the system induces evaporation, distributing water through your place. 

Reservoir Humidifiers 

Reservoir humidifiers are slightly cheaper than other humidifiers but are less reliable and efficient. The reservoir humidifiers create moisture by using the rotating drum filled with water.  Since the system is always full of water, the risk of mould is high. Thus, it requires regular disinfectant maintenance. 

Why Should You Consider Buying a Furnace Humidifier? 

Improved levels of comfort  

As of now, you know how a humidifier works and the pros and cons that they offer your home. The arid condition makes your eyes, lips, and skin dry. Prolonged exposure to arid conditions can cause your skin to become chapped and itchy.  Increasing the humidity level in your homestead by using the furnace humidifier can assist in healing your skin and make you feel generally comfortable in your skin. In addition, it reduces static electricity. Thus, it eliminates painful shocks that you experience daily by opening doors. 

Low cost of energy 

Moist air tends to feel warmer than dry air; that’s why when the humidity level is high, you tend to feel very warm on a chilly day. You can turn down the thermostat a few degrees lower when you add moisture to the air while maintaining the same comfort. Therefore, you can save some money on your heating bill. 

Improved and efficient air quality 

If you are still asking how a furnace humidifier works, it improves air quality by adding moisture to the air. With more humidity in the air (ranging from forty to fifty percent), the particles that affect the mucus membrane negatively are absent.  These particles are allergens and dust. Increasing humidity will help keep away the viruses, bacteria, and dust mites that often thrive in arid climates. In case you have flu or a cold, the humidity present in the air might reduce the symptoms and assist you in recovering quickly. 


When the surrounding conditions in your home are dry, e.g., plaster, artwork, paint, instruments, they can crack or warp as the humidity changes.  The furnace humidifier assists you in keeping the same conditions all year, thus reducing the risk of damaging items in your homestead. Another benefit of the furnace humidifier is that the installation is quick and easy since you are connecting it to your current HVAC system. 

Does the Furnace Humidifier Cause the Appearance of Moulds? 

If you take suitable measures and steps, the furnace humidifier doesn’t cause any moulds. Many of us wonder how a furnace humidifier works and whether it favours any moulds. It’s straightforward. Moulds grow almost anywhere and only need two requirements to grow; oxygen and water. Light is not a necessity.  Moulds tend to survive in the humid regions inside your place, often close to plumbing leaks and in bathrooms. Furnace humidifier doesn’t cause any moulds unless it is set very high to a point where the conditions favour the growth of moulds.  Keeping the humidifier at 45% should do the trick. Remember to check the hygrometer to ensure you are getting the correct results.

Furnace Humidifier as a Good Option for Your Household 

Thank you for reading this article. You now know how a furnace humidifier works and its pros and cons. If you want to live comfortably in your house, the furnace humidifier is the best option.  All you need to do is turn the furnace humidifier to the desired temperature settings that you would like to have in your home and enjoy maximum comfort.

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