The Negative Effects of Humidity on Your HVAC System

The relative humidity in the Amazon rainforest regularly exceeds 90% during the month of July. Oddly enough, the relative humidity also exceeds 90% in Houston Texas during the month of July. Houston gets about ½ of the Amazon’s rainfall, but some days it doesn’t feel like that.

We often appreciate air conditioning for the relief from the relentless heat, but when an air conditioner removes humidity from indoor air it allows modern living in the deep South. It will maintain a safe and comfortable 40 to 60% humidity indoors—a modern marvel.

Dry air does not affect air temperature, but it does contribute to comfort. Without air conditioning, indoor spaces are hot, muggy, and smelly. Blooms of mold and mildew would ruin belongings and leave the air unsafe to breathe. Homeowners should fully appreciate this function of air conditioning and take steps to enhance the feature.

How It Works

• It starts with a massive fan that draws all the air in a home through the air conditioner system. As it pushes air out of the cabinet, it pulls air into the cabinet.
• The ductwork serves as a funnel, focusing the air movement through a relatively small space—the evaporator chamber.
• Inside the chamber, the air comes into contact with a network of tubes containing cool refrigerant gas. The humidity in the air condenses on the tubes and is carried away from the home.
• The air is mixed and freshened throughout the home. This process happens repeatedly; the air moves through the chamber several times per cycle.

The two necessary components of removing humidity are lots of air movement and cool tubes in the evaporator chamber.

Helping With Humidity Removal

• Right before the ductwork funnel ushers the air into the chamber, an air filter cleans the air. These filters are very efficient, removing between 70 and 95 percent of airborne particles. Over time, the collection of dust, pollen, and dander becomes thick enough to restrict airflow. Make it a habit to change the air filter at least every three months.
• The refrigerant level needs to be checked regularly since a drop in gas pressure indicates a leak. A technician will test the level and will check and clean components at risk.
• Normally, the ductwork stays intact after it is installed, but on rare occasions, damage occurs that allows humid outside air into the home. Renovations or storms can move ducts and create openings. Of course, the ducts need to be cleaned occasionally, about once every 3 to 5 years.
• Did your mom ever ask, “Were you born in a barn?” Be wise about opening doors and windows when the humidity is high.
• Most homes are equipped with exhaust fans in bathrooms and kitchens. They are useful for removing excess humidity during showers and cooking. But as the air moves outside, the fan pulls air outdoor (more humid) air inside. Use these fans just long enough to clear the fog away.
• Ignoring needed repairs will not improve the situation. One failure creates stress on other parts and can lead to a cascade of failures.

Air conditioner systems have a pretty consistent record of longevity—the average system lasts between 15 and 20 years. One approach to this fact is to nurse an old system for as long as possible. A better approach is to plan a replacement since the new system will be much more efficient than the old, aging system.

Are the effects of humidity impacting your HVAC system efficiency?

With decades of HVAC system repair and maintenance experience, AirPro Houston provides you with the skills and expertise to assist with your HVAC system needs.

If needed, we have many financing options available, including great options with up to 72-month terms with approved credit. Call us today at  281-880-8805 and let us partner with you for all of your HVAC system Repair, Tune-up maintenance, and needs for HVAC System Replacement.