10 Residential HVAC Airflow Problem Indicators
- Hot and cold spots indicate uneven airflow, lack of airflow, or the infiltration of outside air in the space.
- Bad design can result in airflow problems. Oftentimes a residential HVAC system can be oversized, thus turning the unit on and off much more frequently with excessive airflow and insufficient humidity. Another example is undersized ductwork from original installation or due to equipment replacement.
- Doors that open or slam shut or strong airflow beneath doors can indicate pressure imbalance and uneven airflow distribution.
- Airflow problems can result from an obstructed condenser. Residential condensers are often clogged with lawn clippings, leaves, pollen, dust, and other debris that accumulate on the coil, blocking airflow to the fan for proper heat exchange. This can cause high head pressure and affect cooling.
- A clogged filter raises static pressure and lowers airflow throughout a home.
- Installing the wrong filter can result in airflow problems. Many homeowners install thick, dense, high-efficiency filters that are not compatible with their system, creating a high pressure drop similar to that of a dirty filter.
- A dirty evaporator coil is a common occurrence when filters are broken or missing.
- Dirt accumulation on blower fan blades can lower CFM and hamper airflow.
- Broken or leaky ductwork is a frequent culprit when it comes to airflow problems. Flex duct or dampers can come apart, dampers can malfunction, and ductwork is often stepped on and crushed.
- Blocked grilles and dampers are common issues. Furniture and home décor can block return grilles or supply registers, and occupants often close register dampers and leave them that way.
Homeowners should consider hiring a reputable and experienced HVAC contractor to conduct a system performance assessment. The technician should measure static pressure, total airflow, and individual room or area airflow. Ductwork supply and return should be inspected thoroughly, along with the outside condenser and compressor unit. Once identified problems have been corrected, a regular preventive maintenance program is the best way to maintain optimal system performance.
About E.P. Homiek
E.P. Homiek Sheet Metal Fabrication & HVAC Supply, with two convenient locations in Lakewood, NJ and Union, NJ, provides one- to two-day turnaround on all residential and light commercial ductwork, as well as one- to two-hour emergency fabrication service, rapid delivery, and competitive prices. HVAC parts, supplies, and equipment lines include Goodman, Honeywell, Bryant, Bradford White, Crown Boiler, Daikin, Weil-McLain, Sea Breeze, Generac, Fantech, ZM, A.O. Smith, Hart & Cooley, Malco, Mueller, and many more.
