If you live in Shreveport, you already know what too much humidity feels like. You walk outside on a July morning and it hits you like a warm, wet towel. What a lot of people do not realize is that the same thing can be happening inside their home, just not as obviously.
Indoor humidity that is too high does not just make you uncomfortable. It wears down your home, hurts your health, and makes your HVAC system work much harder than it should. Getting humidity under control is one of the most effective things you can do for your family’s comfort and your home’s long-term condition.
This guide covers what a good humidity level looks like, what happens when it gets out of range, and the best ways to fix it in a climate like northwest Louisiana.
What Is Relative Humidity?
Before we talk about ideal levels, it helps to understand what we are actually measuring.
When people talk about humidity, they usually mean relative humidity, which is shown as a percentage. It measures how much moisture is in the air compared to the maximum amount that air could hold at that temperature.
Here is why temperature matters: warm air can hold a lot more moisture than cold air. When the temperature drops, that same amount of moisture becomes a bigger percentage of what the air can hold. This is why houses in colder climates can feel dry in winter even though there is moisture in the air. The cold air simply cannot hold as much of it.
In Shreveport, we deal with warm, moist air for most of the year. That means our relative humidity is consistently high, often well above what is comfortable or healthy indoors.
What Is the Ideal Humidity Level Inside a House?
The sweet spot for indoor relative humidity is between 45 and 55 percent.
Most experts, including the Environmental Protection Agency, say that anything between 30 and 60 percent is acceptable. But for comfort, health, and protecting your home, 45 to 55 percent is where you want to be.
Here is how the ranges break down:
| Humidity Level | What It Means |
| Below 30% | Too dry. Causes dry skin, irritated sinuses, and damage to wood floors and furniture. |
| 30% to 45% | Comfortable for most people. Better suited to dry climates or winter months. |
| 45% to 55% | Ideal range. Comfortable, healthy, and safe for your home year-round. |
| 55% to 60% | Getting uncomfortable. Mold and dust mites start to thrive. |
| Above 60% | Too humid. Health risks increase, damage to your home begins. |
For Shreveport homeowners, the challenge is almost always keeping humidity from going too high, not too low. Our summers regularly push outdoor relative humidity above 85 percent, and that moisture finds its way inside.
Why High Humidity Is Such a Problem in Northwest Louisiana
Shreveport sits in a humid subtropical climate zone. That means long, hot, humid summers and mild winters that still carry plenty of moisture in the air. We do not get much of the dry, crisp air that homeowners in drier states rely on to keep indoor humidity in check.
When your home is humid, a few things happen at the same time:
- The air feels warmer than the thermostat says it is, so you turn the temperature down further, which drives up your electric bill
- Your air conditioner runs longer and works harder to try to compensate
- Moisture accumulates in places you cannot see, like inside your walls and under your flooring
Understanding what high humidity actually does to your home and your family helps you take it seriously.
What High Humidity Does to Your Home
Your Health
High indoor humidity creates ideal conditions for things that hurt your respiratory system. Mold spores, dust mites, and bacteria all multiply much faster when the air is moist. If anyone in your home has allergies, asthma, or sinus issues, high humidity is likely making it worse.
Dust mites in particular thrive at humidity levels above 50 percent. These microscopic creatures are one of the most common indoor allergy triggers, and a humid home is essentially a perfect home for them. Keeping humidity below 50 percent is one of the most effective things you can do to reduce their population.
Your Home’s Structure
Excess moisture in the air slowly damages your home. Wood absorbs it and swells, which causes warping in floors, cabinets, and door frames. Paint blisters and peels. Wallpaper separates from walls. Drywall softens.
In places where moisture concentrates, like bathrooms, crawl spaces, and around windows, mold takes hold. Mold is not just unsightly. It eats organic materials like wood and drywall and can cause structural damage over time.
Your HVAC System
Your air conditioner removes some humidity as part of the cooling process. When indoor humidity is very high, your system has to work harder and longer to achieve any given temperature because the air just feels hotter than it actually is. This extra runtime means higher energy bills and more wear on your equipment.
A well-maintained system handles humidity better than a neglected one. Scheduling a seasonal AC tune-up helps make sure your system is pulling as much moisture as possible out of the air during every cooling cycle.
What Low Humidity Does to Your Home
Low humidity is less common in Shreveport than high humidity, but it does happen, especially during winter cold snaps when you are running your heating system.
When indoor air drops below 30 percent humidity:
- Skin gets dry, itchy, and cracked
- Lips chap and nasal passages dry out, which makes you more susceptible to respiratory infections
- Static electricity builds up on everything
- Wood floors, trim, and furniture shrink and crack
- Musical instruments and artwork can warp or crack
If your home feels uncomfortably dry during winter heating season, adding moisture back to the air with a humidifier can make a significant difference in comfort and in protecting your belongings.
How to Measure Humidity in Your Home
You cannot see or measure humidity by feel alone. You need a tool called a hygrometer or humidistat. These are small, inexpensive devices that display the current relative humidity in a room. You can find basic ones for under $20 at most hardware stores.
Place one in your main living area and one in any room where you suspect humidity might be an issue, like a bedroom, basement, or bathroom. Humidity can vary significantly from room to room.
Many modern smart thermostats include a built-in humidity display so you can monitor both temperature and moisture levels from one device or from your phone. This is one of the easiest upgrades you can make for better home comfort control.
How to Lower Humidity Inside Your Home
Lowering humidity is the primary challenge for most Shreveport homeowners. Here are the most effective solutions, starting with the most powerful.
Your Air Conditioner
Your AC already removes moisture from the air as it cools. When warm, humid air passes over the cold evaporator coil inside your system, water vapor condenses into liquid and drains out through the condensate line. This is a natural part of how air conditioning works.
The problem is that your AC can only dehumidify while it is cooling. On mild days when the temperature is not high enough to trigger much cooling, it may not run long enough to pull meaningful moisture out of the air. And if your system is oversized for your home, it will cool too quickly, shut off, and never run long enough to dehumidify properly.
This is why proper sizing matters so much when you are considering a new AC installation. A correctly sized system runs longer at lower power, which removes far more humidity than an oversized unit that cycles on and off quickly.
A Whole-House Dehumidifier
A whole-house dehumidifier is the most effective solution for homes that consistently struggle with high humidity. It installs directly into your HVAC ductwork and runs independently of your AC, which means it removes moisture from the air even on cool days when the AC is not running.
These units treat your entire home at once, unlike portable dehumidifiers that only handle a single room. They connect to a drain line so they empty themselves automatically. You set your target humidity level on the humidistat and the unit does the rest.
For Shreveport homes where humidity is a year-round concern, a whole-house dehumidifier working alongside your AC is the combination that gets indoor humidity where it needs to be and keeps it there. Ask about our indoor air quality solutions to learn what options make sense for your home.
Portable Dehumidifiers
A portable dehumidifier can help in a single room or area, like a basement or bedroom. They are less effective and less convenient than whole-house systems because they require manual emptying of a water collection tank and only treat the space they are sitting in. For a problem that affects your whole home, they are a limited solution.
Daily Habits That Help
Some simple changes reduce how much moisture enters your home:
- Run bathroom exhaust fans during and after every shower, for at least 15 minutes
- Use the exhaust fan above your stove when cooking
- Keep dryer vents clean and properly connected to the outside
- Fix any plumbing leaks promptly. Even a slow leak under a sink raises local humidity and risks mold growth. Our plumbing repair team can handle leaks quickly before they turn into bigger problems.
- Keep gutters and downspouts clear so water moves away from your foundation
- Seal gaps around windows, doors, and pipes where outdoor humid air enters
How to Raise Humidity in Winter
If your home feels dry during the heating season, here are your options:
Portable humidifiers work well for individual rooms. They require regular cleaning and refilling but are inexpensive and effective for targeted areas.
A whole-house humidifier connects directly to your HVAC system and adds moisture to the air as it circulates through your home. These are more convenient than portable units and treat your entire home automatically. Ask your technician whether a whole-house humidifier makes sense based on how dry your home typically gets.
When Your AC Is Not Keeping Up with Humidity
If you are running your air conditioner and your home still feels sticky and uncomfortable, one of a few things is happening:
Your system is oversized. It cools too fast, cycles off before removing enough moisture, and leaves the air feeling damp even at a reasonable temperature.
Your system needs maintenance. A dirty coil, low refrigerant, or restricted airflow all reduce how effectively your system removes humidity. A tune-up or inspection can identify and correct these issues.
Your system is old. Older AC systems were not designed with humidity control in mind the way modern units are. Variable-speed systems, in particular, are far superior at pulling moisture out of the air because they run longer at lower speeds rather than cycling on and off.
Your ducts need attention. Dirty or leaky ducts reduce airflow and allow humid air to re-enter the system. A duct cleaning can improve both air quality and your system’s ability to control humidity.
In some cases, the right solution is a combination: a well-maintained, properly sized AC working alongside a whole-house dehumidifier. Our team can assess your home’s humidity challenges and recommend the most cost-effective approach.
