The Impact of Inadequate Airflow from Improper Duct Installation on AC Performance

A poorly installed duct system can have a major effect on an air conditioner's performance, increasing energy costs, providing insufficient cooling, lack of dehumidification and causing premature system failure. This is how:

Reduced Cooling Efficiency

• Undersized ducts make it harder for the air conditioner to distribute the proper volume of air throughout the house, reducing cooling efficiency and its ability to dehumidify.
• Air velocity is reduced by oversized ducts, which leads to uneven cooling and inadequate dehumidification. 
• Leaky ducts that let conditioned air escape into walls, crawl spaces, or attics further decrease efficiency.

 Result: The house struggles to keep the temperature comfortable, and the air conditioner runs longer cycles.

 Increased Energy Consumption

• The air conditioner must work harder and longer due to poor airflow, which results in higher electricity use.
• The system cannot adequately exchange heat when airflow is restricted, which results in increased power usage.
• Return ducts that are too tiny or obstructed prevent the air conditioner from getting enough air, which lowers efficiency and puts stress on the system.

 Result: Overworked system and increased utility expenses.

Frozen Evaporator Coils 

• Proper heat absorption is impeded by inadequate airflow over the evaporator coil in cases with frozen evaporator coils.
• Reduced cooling capacity and ice formation might result from moisture on the coil freezing.
• When a frozen coil melts, water damage could result.

Result: The air conditioner either stops cooling efficiently or completely shuts off. 

Short Cycling (Frequent On/Off Cycles)

• The system may cool down too quickly and cut off before a full cycle is finished if the ducts are too small or poorly built. This is known as "short cycling" (frequent on/off cycles). 
• This results in inadequate humidity control, making the living space moist and uncomfortable.
• Short cycling shortens the compressor's lifespan by increasing wear and tear.

 Result: Premature system failure and increased repair costs are the outcomes. 

Hot and Cold Rooms in the Home

• As a result of improperly placed ducts, air is distributed unevenly, making some rooms too hot and others too chilly. 
• Inconsistent comfort results from long duct runs with inadequate airflow balance, which lowers air pressure. 

 Result: Uncomfortable living quarters and frequent temperature adjustments are the outcome. 

More Humidity & Mold Growth

• Poor return duct positioning, such as pulling air from the floor rather than the ceiling, can cause moisture to be trapped.
• Insufficient ventilation hinders proper dehumidification, resulting in a musty and damp house. 
• Mold grows when there is too much moisture in the ducts, and it can spread through the air.

 Result: Poor indoor air quality and possible health risks. 

**Fixes for Appropriate Duct & Airflow Design**

• Adequately size and balance ducts according to the AC capacity and the layout of the house. 
• To stop air leaks and energy waste, seal and insulate ducts. 
• To improve humidity control and air circulation, install return vents at ceiling level in every room. 
• Make sure the air handler is positioned correctly to maximize airflow. 
• Arrange for expert inspections in order to spot and address duct problems early. 

The performance of your air conditioner is compromised by hidden duct issues, which we specialize in fixing at FL HVAC Services. Contact us right now for a professional assessment!  352-358-5537 📞