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Effective HVAC Humidity Control: Enhancing Your AC’s Performance

Aug 11, 2023

At No Problem Heating & Cooling, we understand the significance of efficient HVAC humidity control, especially in the context of current health concerns like COVID-19. Controlling indoor humidity levels between 40 and 60 percent is crucial not only for comfort but also for inhibiting the virus’s survival. If you’re facing issues with your AC’s humidity control, read on to discover five reasons your AC might not be performing as expected and how to improve the situation.

Problem #1: Improper AC Sizing

It’s not about the physical size, but the cooling capacity of your AC. Surprisingly, an oversized AC system can hinder humidity control. The frequent on-off cycling of a powerful compressor prevents effective humidity removal. To address this, accurate AC sizing based on load calculations is essential. We often find that homes and businesses with incorrectly chosen units suffer from poor humidity control. Sometimes, switching to a smaller capacity AC system might be the solution.

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Problem #2: Single-Speed AC Units

AC units with fixed speeds can also struggle with humidity control. Operating solely at full capacity, these units tend to turn on and off too quickly to effectively manage humidity. To combat this, consider investing in a modulating HVAC system, such as a Variable Refrigerant Flow (VRF) system. These systems can operate at varying capacities for extended periods, providing better humidity control, consistent temperatures, and reduced energy consumption.

Problem #3: Negative Air Pressure

Negative air pressure due to improper ventilation design can compromise humidity control. When too much air is vented from a space, the system draws outside air through openings, leading to increased humidity. This is particularly evident in settings like restaurants with powerful kitchen exhaust systems. Addressing this issue may require modifications to your ventilation system design to ensure better humidity management.

Problem #4: Incorrect Thermostat Settings

Using the “FAN ON” setting on your thermostat, which keeps the fan running continuously even when the AC isn’t active, may seem like a way to reduce humidity. However, this setting can actually worsen humidity conditions by redistributing moisture back into the space before it can drain away. It’s important to use appropriate thermostat settings to avoid exacerbating humidity issues.

Problem #5: Aging AC Units

Over time, aging AC units can lose efficiency, impacting humidity control. Regular maintenance is crucial to keep these units performing optimally. Inconsistent temperatures and poor humidity control are indicators that your system might need attention. You might face the decision of repairing or replacing the unit. If you’re not ready for a replacement yet, there are measures you can take to enhance your AC’s humidity control capabilities.

Enhancing Humidity Control in Existing Systems

-Clean the Coils: Regularly cleaning the condenser coils can significantly improve humidity control. Dirty coils hinder heat release and reduce the AC’s efficiency, making it harder to remove humidity from indoor air.

-Invest in Preventative Maintenance: A comprehensive maintenance plan includes regular inspections, tune-ups, and cleaning of system components. This helps maintain optimal efficiency, ensuring better humidity control and identifying potential issues before they worsen.

-Adjust Airflow: Skilled HVAC technicians can adjust airflows to enhance humidity control. In certain AC systems, adjusting airflow to cool the evaporator coil further during high humidity conditions can lead to better moisture removal.

-Consider a Dehumidifier: If all else fails, adding a dehumidifier to your existing AC system can provide targeted humidity control. This accessory removes excess moisture before air circulates through the ductwork.

At No Problem Heating & Cooling, we’re dedicated to resolving HVAC humidity control issues to ensure your indoor space remains comfortable and safe. Our experts can assist in assessing your AC system, recommending solutions, and implementing measures to enhance humidity control efficiently. Feel free to reach out for professional advice tailored to your specific situation.