Prevent Common HVAC Problems: Check Your HVAC Airflow

Prevent Common HVAC Problems: Check Your HVAC Airflow

The air that flows through your HVAC system is what keeps your home comfortable. The amount of airflow through the supply and return ducts also impacts how much energy your HVAC equipment uses, your indoor air quality, and the lifespan of the various components.

Problems with HVAC airflow produce some noticeable symptoms, including:

  • Temperature variations and hot or cold spots
  • Weak/inconsistent airflow from the registers
  • Difficulty maintaining comfort throughout the house
  • Decline in air quality due to pressure imbalances

Underlying Causes of Airflow Problems

When your HVAC system is functioning properly, it sends out a certain volume of air through your supply ducts, and brings an equal amount of air back through the return ducts for reconditioning. Your system’s airflow can be thrown off balance by:

  • Closed or obstructed supply registers and return grilles that restrict air movement through the system.
  • A clogged air filter, which impedes airflow across the cooling coil.
  • Leaks in the ductwork that allow conditioned air to escape.
  • Flawed ductwork design, leading to ineffective, uneven cooling.
  • Dirt accumulation on the coils, which inhibits proper heat transfer and reduces conditioned air output.
  • Too-slow fan speed, which allows the coil to ice up and erodes the system’s cooling capabilities.
  • Oversized equipment that short cycles and doesn’t provide the airflow needed to properly control temperature and humidity.
  • Insufficient airflow through the condenser unit, which impairs heat transfer and makes cooling your home more difficult and costly.

How to Check HVAC Airflow

Checking airflow to identify the source of problems is a complicated task. It involves calculating flow rates, velocity and volume of air delivered, and computing the amount of air movement across the coil. These calculations must then be compared with the equipment manufacturer’s specs to determine if and where there are inconsistencies.

An experienced HVAC pro has the skills and specialized tools needed to accurately assess your system’s airflow. Once problems are identified, they can give you sound advice on the right solutions.

If you’re experiencing HVAC airflow problems in your Martin, Palm Beach or Indian River County home, contact us today at NisAir Air Conditioning and Heating.

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