How to Solve a Dry Air Problem

By Editorial Team

Updated on May 8, 2025

Woman wrapped in a blanket and scarf, holding a hot drink in a modern living room.

Is the air inside your home too dry? It can be challenging to identify the cause of this unpleasant situation and determine the appropriate ways to address it.

Here is an explanation of this phenomenon and some solutions to correct the humidity level in your home.

Excessively Dry Indoor Air

Causes

Several factors can explain the presence of overly dry air inside the home. Firstly, the heaters commonly used in winter tend to dry out the air and reduce humidity levels. Due to the home's insulation, the air remains trapped inside and circulates little.

Secondly, insulation problems can also be the source of a lack of humidity inside the house. Indeed, cold air is less capable of retaining humidity, so when it enters the home (due to poor insulation), it warms up and becomes dry.

Consequences

Particularly in winter, dry air can quickly become a problem and have unpleasant consequences. Not only does dry air cause many health issues such as nasal congestion, nosebleeds, and worsening respiratory problems, but it can also damage your wooden furniture or floors. These can crack due to insufficient humidity in the air. Lastly, dry air tends to increase the concentration of dust in the air.

Addressing the Dry Air Problem: Solutions

Wilted houseplant on a sunny windowsill, next to a blanket and cushion in a relaxation corner.

Source : Soumission Rénovation

First, you should check the humidity level with a hygrometer. If it indicates that your humidity level is below 40-45%, the air in your home is indeed too dry. Depending on your dwelling, the solutions to implement will vary.

For a Small House or Apartment

If your home is small or you live in an apartment, you can increase the humidity level using portable humidifiers, which should be installed in the most frequently used rooms. There are three main models: warm mist, cool mist, and ultrasonic.

  • Warm Mist Humidifiers: As the name suggests, this model emits warm steam. Since hot water tends to eliminate bacteria, warm mist humidifiers usually require little maintenance. However, they pose a burn risk and are therefore not recommended for children's rooms. Note that they are slightly noisier than other models.

  • Cool Mist Humidifiers: These models pass ambient air through a water-soaked filter to diffuse cool mist via a small fan. However, they require daily maintenance, as bacteria can proliferate in the water. Inhaling this mist could have adverse health effects, so it's recommended to change the water and clean the device after each use.nachi.org

  • Ultrasonic Humidifiers: These are known for being more efficient than the previously mentioned models. They operate by using a thin metal plate that vibrates at high frequency, breaking water molecules into fine droplets. The resulting ultrasonic mist is then diffused into the ambient air, where it evaporates without leaving any water vapor residue on interior surfaces. These humidifiers are appreciated for their quiet operation. Like cool mist models, they require daily cleaning. Ideally, you should use distilled water to prevent the filter from clogging due to minerals present in tap water.

For a Large House

For a larger home, it will be necessary to invest in the installation of a central humidifier. Central humidifiers are equipped with programmable humidity regulators, allowing you to maintain an optimal humidity level in the air.

To ensure your humidifier operates at full capacity, maintain the system regularly and don't forget to clean the filters.

Tips to Prevent Dry Air in Your Home

White humidifier in operation on a wooden table, surrounded by decorative plants in a bright room.

Source : Soumission Rénovation

  • Do not allow the indoor temperature to rise above 21 degrees Celsius.

  • Leave the bathroom door slightly open after taking a shower.

  • When possible, ventilate the house. Ideally, do this twice a day for 5 minutes.

  • Lower the heating by one or two degrees.

Additional Information

A home heated by forced air allows for the installation of a humidifier at the furnace outlet, which is very practical. These air humidifiers for heating systems use water directly from the plumbing system instead of requiring constant refilling like portable humidifiers.

How Much Does a Humidifier Cost?

As a guideline, here are the average prices for purchasing a humidifier:

  • Central Humidifier: between $800 and $4,000

  • Cool Mist Humidifier: between $45 and $200

  • Warm Mist Humidifier: between $55 and $500

  • Ultrasonic Humidifier: between $40 and $300

Summary Table of Key Information About Dry Air Problems in a Home


What you need to know

The consequences

  Health issues: nasal congestion, nosebleeds, and worsening of respiratory problems.
The preservation of your wooden furniture or flooring is compromised.
Increased concentration of dust in the air.  

The causes

Heaters used in winter can dry out the air and reduce humidity levels.
Insulation problems. 

Solution for a small house

Purchasing a portable humidifier (warm mist, cool mist, or ultrasonic). 

Solution for a large home 

Installing a central humidifier. 

Would you like a few tips to improve your home's indoor air quality? Take a look at our article on the topic!


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