The efficiency of an air conditioning system determines how much electricity it uses and thus costs to run. It also determines how well it cools your home. The main concern with airflow regarding efficiency is static pressure. If static pressure is too high or too low, an AC will consume much more energy. Let’s explore what you should do to avoid those problems.
Keep Vents and Doors Open
Traditional central AC systems are designed for uniform cooling throughout a home. Closing vents in an unused room doesn’t save money. It increases static pressure on the return side of the system. Keep interior doors open as much as possible when running your AC. You should also use ceiling fans in all rooms where practical to help even out the cooling.
Choose the Right AC Filter
The HVAC industry uses the minimum efficiency report value (MERV) to rate filters. The higher the MERV rating, the better the filtration but also the higher the static pressure. Most modern ACs support between MERV 8 and MERV 13. You should use as high as your system supports for better filtration, but don’t exceed it. Going too high can have a dramatic effect on airflow if you do.
Replace the Filter Regularly
Check your HVAC filter at least once a month, and replace it as needed. You’ll know it needs replacing because there’s dust caked on the outer surface or because you hear a whistling sound. Continuing to use a clogged filter is tantamount to using a filter with a high MERV rating. It will significantly decrease airflow in the system.
Schedule Seasonal Tune-Ups
Schedule an AC tune-up every spring before turning on your cooling system. A technician will clean the equipment and perform a multipoint inspection. That includes lubricating and, if necessary, balancing the blower. A technician will also test static pressure on both the supply and return sides.
Schedule Duct Camera Inspections
Homeowners should schedule a duct camera inspection every other year. A routine tune-up typically doesn’t include that service, but you can usually schedule them for the same appointment. Using a high-definition camera, a technician will identify any problems that can undermine airflow. That includes air leakage, which you can correct through duct sealing. It also includes excessive dust accumulation, which you can correct through duct cleaning.
Schedule Air Balancing
Schedule air balancing at least every five years and more often if you have a zoned system. Air balancing will include a duct camera inspection. It will also involve any other maintenance required to get static pressure in the optimal range on both sides of the system. That could, for instance, involve calibrating your duct dampers.
If you’re concerned about your AC’s airflow in Farmington, ME, contact A-1 Plumbing and Heating to schedule an inspection.
