How a Dirty Blower Wheel Can Cut Your AC’s Airflow by 43% – And Why It Matters
Blower Wheel Neglect Could Be Costing You Big
When it comes to your air conditioner’s performance, most homeowners think about filters or refrigerant—but there's another major culprit behind poor cooling and high energy bills: your blower wheel.
According to an in-depth study by Texas A&M University’s Energy Systems Laboratory, a dirty blower wheel can decrease your HVAC system's airflow by up to 43%, causing significant loss in cooling performance, efficiency, and even threatening your compressor’s lifespan.
“Low evaporator airflow… reduced cooling capacity by 15%, efficiency by 12%, and superheat by 40%—all of which occurred at just 57% of normal airflow.”
– Energy Systems Laboratory, Texas A&M University (Source PDF)
What’s the Blower Wheel, and Why Is It Important?
Your blower wheel is the part of your HVAC system that circulates air through the home. Over time, dust, debris, and moisture build up on the wheel's blades, reducing its ability to move air efficiently.
This reduction doesn’t just make your home less comfortable—it:
Causes longer run times
Reduces cooling capacity
Increases energy bills
Puts strain on your compressor
Can eventually lead to total system failure
Warning Signs of Airflow Issues:
Uneven cooling throughout your home
Weak airflow from vents
AC running constantly or short cycling
Higher than usual electric bills
Dust buildup or visible dirt on vents
What Can You Do?
Regular HVAC maintenance—including blower wheel inspection and cleaning—can restore airflow, protect your equipment, and lower energy costs. The Texas A&M study demonstrated that even under normal indoor conditions, airflow losses due to blower wheel fouling reached a “critical point” for system performance and safety.
Pro Tip from the Pros at Reel Cool AC & Heating:
Have your blower wheel cleaned and your system inspected at least once a year. In Florida’s hot and humid climate, dust and moisture accumulate faster—making regular service a must.
Get Peace of Mind—Call the Pros
At Reel Cool AC & Heating, we specialize in energy-efficient maintenance and repairs for homeowners in St. Augustine, Palatka, and surrounding Florida areas.
📞 Call us at 386-240-4604
🌐 Visit: www.reelcoolacandheating.com
Let us help you breathe easier—literally and financially.
Source:
Watt, Jim. Development of Temperature and Humidity-Based Indicators for Diagnosing Problems in Low Tonnage, Split System Air Conditioners, Energy Systems Laboratory, Texas A&M University, 1998.
Read the full study here (PDF)