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  • Nicole Trumbo

The Ideal Indoor Humidity Level for Your Home: Your Questions Answered

a humidity thermostat

Ever wondered how the elusive concept of indoor humidity influences your daily life? Pondered how to set it, what to do, and what tips and tricks you can follow to get the most comfortable experience?

Well, it's about time to dive in!

For too long, homeowners have suffered, living with poor humidity levels that have been tediously accepted down to a lack of knowledge of how to make their space feel any other way.

Well enough, we say. It's time to get in the know with an understanding of how to maintain the ideal indoor humidity level to ensure a comfortable, healthy living environment. In this post, we'll clarify all your uncertainties related to indoor humidity and its intricate relation with HVAC systems.

Let's dive right in!

How Do You Maintain Temperature & Humidity in an HVAC System?

You need an HVAC system designed for your specific space to uphold a harmonious balance between temperature and humidity.

This means you can't just chuck in any old system and hope for the best, but instead need one that's specifically chosen to give you the best experience.

For example, a tiny HVAC system designed for an apartment will never work for an entire three-floor house. It's just not powerful enough.

Choose wisely.

On top of this, routine maintenance is key to optimizing your system's performance. If your system isn't well looked after, general wear and tear is going to burn parts out.

Using a humidistat is also a brilliant way to keep tabs on and control indoor humidity levels.

How Do You Maintain Temperature & Humidity in an Air Handling Unit (AHU)?

An AHU, another vital player in your HVAC system, governs temperature and humidity by controlling the influx of outdoor air. It can be fitted with humidifiers or dehumidifiers, helping adjust moisture levels to your preference.

As with all parts of your HVAC system, make sure your AHU is well-maintained and looked after to ensure it's working to its full potential, has maximum efficiency, and delivers the results you're actually expecting!

What is the Humidity in an Air-Conditioned Room?

Big question, what actually is humidity?

Quite simply, it's the amount of water in the air. When the humidity is high, it can cause you to feel tired, lethargic, and uncomfortable. Too low, and you can experience static electricity, dry skin, cracking lips, scratching throats, and increased coughing and itching.

All are associated with low amounts of moisture in the air.

Humidity in an air-conditioned room can swing widely, depending on the room's conditions. Ideally, it should hover between 30-60% to maintain a comfortable environment.

What is the Purpose of Humidity Control in an HVAC System?

Humidity plays a significant role in ensuring a pleasant, healthy indoor environment.

Appropriate humidity levels safeguard against issues like dry skin, respiratory troubles, and damage to your furniture.

Removing humidity is crucial to ensuring a comfortable and healthy indoor environment. High humidity can lead to problems such as mold growth, musty smells, and discomfort.

How Does an Air Conditioner Remove Humidity?

In order to get the humidity to the appropriate levels, your HVAC system will need to add and remove moisture from the air proactively, but how does it do this?

Most commonly, an air conditioner will tackle humidity by cooling the air, causing the moisture to condense and be expelled through a drain line. When heating, it extracts heat from the exterior air, thereby removing moisture as the air cools before circulating it back into the room.

What is the Average Humidity of an Air-Conditioned House?

Just like an air-conditioned room, an air-conditioned house should ideally have a humidity level between 30-60% for optimal comfort.

While it's subjective and depends on your specific space, setting your air conditioner around 78°F is generally considered optimal for energy efficiency and comfort.

Does Running the Fan on My Air Conditioner Reduce Humidity?

Yes, running the fan can help reduce humidity by promoting air circulation and evaporation of moisture from surfaces within your space.

Does Turning Off the AC Increase Humidity?

Switching off your air conditioner may increase humidity if there's excess moisture, as the AC won't actively remove it from the air. This could happen when it's been raining outside, and the ground is soaked, or even on a hot day, and water sources in your air are being evaporated.

Do Air Conditioners Work Harder in High Humidity?

Air conditioners do have to work harder in high humidity, as they need to remove excess moisture while cooling the air. This can put a strain on the system, especially if it's on for a prolonged period of time.

This is again why it's important to have a regularly maintained and well-looked-after system to ensure everything is working properly and the system is as efficient as possible.

Why is Air Conditioning Dry Mode Not Heating the Air?

Some HVAC systems will come with a Dry Mode, and it's worth noting this feature is designed explicitly for managing humidity. However, this doesn't warm the air and doesn't have a heating function.

Its main function is to reduce excess moisture by running the air conditioner at a low fan speed, promoting evaporation.


It's clear that understanding and managing indoor humidity levels can contribute to a more pleasant, healthier indoor environment.

From maintaining your HVAC system to understanding the role of humidity, every element plays a part in striking the perfect balance in your home.

With this knowledge, you're well-equipped to navigate the ins and outs of indoor humidity and enjoy the comfort of your space, no matter the season!

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