Is Your Furnace’s Airflow Weak? Check These Common Culprits

If the furnace is not producing a healthy flow of warm air to keep your indoor space comfortable, there are several reasons. Leaking ducts, dirty air filters, improperly sized equipment, inadequate maintenance, and sluggish fans are common problems. Some issues, such as replacing the air filters or adjusting thermostats, you can fix yourself. However, others require the technical expertise of a licensed HVAC professional.

4 Reasons Your Furnace Isn’t Blowing Enough Air

Dirty Air Filters

Most HVAC service calls stem from a lack of maintenance, filthy filters. Filters capture dust and other particles and prevent them from entering ducts. When filters are clogged, hair, dust mites, insect parts, and other airborne debris bypass the filter and flow into ducts. Clogged filters impede airflow, reduce energy efficiency, and compromise your comfort. Check the manufacturer’s directions about how often to change or clean filters. Usually, every three months is the minimum. However, if you live in an area with low air quality or have pets, you may need to change them more often.

Blocked Vents and Registers

A ducted system has both supply and return air ducts. Vents and registers may be located in the floor, walls or near the ceiling. To keep air moving, the ducts must be at a higher pressure than the air in the room. Blocked vents affect the airflow in the living space and the system. Check to make sure curtains, furniture, or other items are not blocking vents.

You may notice that airflow changes when a door to a room is opened or closed. Many homes have centrally located return vents that funnel air from the home to the furnace. Shutting a vent in one room or closing a door can affect airflow and comfort. This happens because airflow between the supply vents and return registers is blocked, which changes the pressure. Your HVAC contractor can evaluate airflow and the placement of supply and return ducts to troubleshoot the problem.

Leaking Ducts

An average of 20% of the conditioned air moving through ducts is lost due to leaks, holes, and poor joints. Leaking ducts result in an increase in fuel usage between 10% and 20% and a decrease of as much as 50% in equipment efficiency. Also, duct leakage affects airflow because it causes changes in pressure.

If you suspect that the ductwork in your home leaks, call the certified experts at Guaranteed Service for an inspection. Repairing and insulating ducts improves indoor air quality, lowers fuel costs, minimizes the risk for backdrafting of dangerous gases, and improves equipment performance.

Proper Sizing

Industry experts emphasize the importance of properly sizing HVAC equipment. Calculating load determines the amount of heating and cooling power required for comfort and energy efficiency. Ducts must be sized in relation to the equipment installed. Airflow can be affected by incompatibility between ducts and the HVAC unit, the length of duct runs, and how the duct network is designed.

Turn to the Brick Township Furnace Repair Professionals

The NATE-certified technicians at Guaranteed Service have experience in calculating load and recommending equipment compatible with your home and budget. We explain the advantages and disadvantages of different equipment types and ensure that each component is properly sized and installed. After installation, we make sure you understand how the system operates. We stand by our work with a 100% customer satisfaction guarantee and a lifetime parts warranty.

For more information about a new installation, problems with poor airflow, or our preventive maintenance services, call (732) 412-1134 to talk with one of our licensed technicians or contact us here.