To start, it’s important to understand that most residential HVAC systems operate in a closed loop. This means your system doesn’t automatically bring in fresh air from outside. Instead, outside air only enters your home when you open windows or doors.
However, outdoor air isn’t necessarily cleaner. In fact, it typically carries more pollutants than indoor air. The good news? Your HVAC system filters and recirculates the air inside your home, removing dust, allergens, and other contaminants with each cycle. That makes your air filter your first line of defense in maintaining good air quality.
Understanding MERV Ratings
Air filters in the U.S. are rated using the Minimum Efficiency Reporting Value, or MERV. The higher the MERV rating, the smaller the particles the filter can trap. While it may seem logical to purchase the highest-rated filter available, doing so can create unintended problems.
Higher-rated filters trap more contaminants, but they also clog faster and may restrict airflow. Reduced airflow can lead to efficiency issues—and in some cases, your air conditioner could even freeze up in summer.
Before switching to a higher MERV-rated filter, consult with one of our experts at Blue Best Plumbing, Heating, Air, & Generators for personalized guidance.
Boosting Air Circulation
Once you’ve selected the right filter, the next step to improving indoor air quality is increasing how often your home’s air passes through that filter. Typically, HVAC blowers only run when heating or cooling is required. Once the thermostat reaches the set temperature, everything shuts off—including the blower.
Newer systems often come equipped with ECM (electronically commutated motors), which allow the blower to run continuously at a low speed. These motors are energy-efficient and help circulate air throughout your home all day, keeping it filtered and fresh.
Additional Tools for Cleaner Air
Even the best filters can’t catch every particle. Ultrafine contaminants may still pass through and circulate back into your home. For those, consider upgrading your system with add-ons like:
- Whole-home humidifiers
- UV or germicidal lighting
- Electronic air purifiers
- High-efficiency five-inch pleated filters
Each of these tools can enhance your system’s ability to maintain clean, breathable air.
If you want to explore options for improving your home’s indoor air quality along the Wasatch Front, reach out to the specialists at Blue Best Plumbing, Heating, Air, & Generators. We’ll help you find the right solutions to create a healthier indoor environment.
