Sealing duct leaks reduces the amount of heated or cooled air the supply fan must handle to deliver the same amount of air to the conditioned space.Very frequently, customers ask us, “What is the best way to run the A/C?” The surprising fact is that many people have misconceptions on how to use their thermostat, fan cycling, etc.
Common A/C Myths
“Lowering the thermostat will cool the house faster.”
This is probably the biggest fallacy because the A/C unit needs time (based on outside temps) to remove the humidity and lower the temperature. There is no shortcut to accomplish this. A properly sized system can reduce the inside temps 2-3 degrees per hour (depending on outside conditions). If outside temps are in the 90 degrees or higher range, then the thermostat setpoint may not be reached.
“Closing the vents in unused rooms saves money.”
Not in any measurable way, but it may cause an imbalance in airflow in other parts of the house.
“Ceiling fans will cool a room.”
Not true, they will circulate air and it feels cool to the skin but it doesn’t change the temperature.
“Duct tape seals air leaks.”
Only for a short time and then it dries out and falls off. In new construction, the code requires foil tape. In existing homes we recommend Aeroseal. Aeroseal duct sealing repairs and patches leaks in HVAC duct systems saving cooling, heating, and fan energy. Sealing duct leaks reduces the amount of heated or cooled air the supply fan must handle to deliver the same amount of air to the conditioned space.
These are a few of the common A/C myths that are out there. If you have any questions regarding these myths or anything else HVAC related, reach me directly at 815-404-4634 or email firstname.lastname@example.org.