Do You Have All Your Ducts In A Row?

Did you know that regular inspection and maintenance of your air conditioning ducts will ensure that your AC is correctly and efficiently sending that cool air exactly where it is needed?

All ductwork must have an air tight seal to function properly. Without an air tight seal in supply or return ductwork, condensation of humid air in building cavities and on neighboring surfaces such as drywall, wooden support beams and other vulnerable surfaces can occur. Humid air can lead to mold on these surfaces, which can significantly impact the health of the air in your home, which can impact your health! Mold will grow on any duct surface that remains wet.

Air leakage can be especially problematic for ducts that are located outside the conditioned spaces. Nobody wants to pay to cool the outside! The primary goal for maintaining your ductwork is to ensure that all air ducts are keeping the cool air within the conditioned space (your home) and to ensure that all the joints and seams of all ducts, including return ducts, are sealed using an appropriate material. Duct leakage, even small ones, from the return lines will cause a significant drop in energy efficiency as it is taking in the air from the attic or crawl space, which is an unconditioned area, and unfortunately, in many cases it vacuums up the nearby attic insulation into the system, causing the air handler coil to become clogged, at times so severely, that the evaporator coil starts to ice.

Why Does My AC Freeze in the Summer?

Your air conditioner is a hard working piece of equipment in the summer time. Let me explain this common problem and what occurs when your AC decides to freeze on an 85+ degree day.

The evaporator coil is the component of a central AC unit that actually freezes. This component of the air conditioner transfers (evaporates) heat from the inside to the outside of your home.

There are two main reasons why your evaporator coil may freeze, the first and most
common one is airflow restriction, which can occur if your filter is dirty, or your evaporator coil is dirty or damaged, or your air ducts are not properly functioning and air leakage from your attic or crawl space ducts are vacuuming insulation into your system, thereby restricting airflow to the point where the air is so severely blocked that your coil freezes.or even a mismatched system where the outside unit is too large for the inside unit (evaporator coil).

The second reason is insufficient refrigerant, (that’s the lifeblood of your AC system!) which can occur if there is a refrigerant leak, causing the refrigerant levels to become low.

Either way, the end effect is that the air conditioner’s evaporator coil cannot operate to properly transfer heat, and in essence over cools itself. The net effect of this supercooling is condensation, (that’s water formation) then, finally ice forms from that condensation as it cools below the freezing point. Yep, your AC just transformed into an old­ school icebox.