The department of energy estimates that an average air conditioning system in the US is typically only 60% energy-efficient. This means your air conditioning unit might only be increasing your home’s energy consumption without delivering as it should. The commonly overlooked cause of HVAC energy-inefficiency is design flaws in your ductwork.
This is also among the leading reasons for frequent air conditioning repair in most Knoxville homes. Since your air conditioning’s ductwork largely remains invisible, it is easy to overlook significant design flaws that affect its operation. Here are the three leading duct design flaws in most properties.
Even if you have the most powerful air conditioning system or furnace, but your ducts are excessively small, then the system will be unable to meet your indoor cooling and heating requirements. HVAC technicians typically use the ACCA Manual D calculation formula to size residential ductwork. The ‘rule of thumb’ used by scrupulous technicians and homeowners during DIY installation usually results in undersized ductwork.
Poorly Placed Elbows
Any elbows in your ductwork reduce the HVAC’s efficiency regardless of their location. It is however impossible to install air conditioning without elbows and hence minimizing these bends is the ideal option. Technicians will typically maximize use of long straight ducts. They will also never place elbows on top of fans as this increases wastage of heated and cold air.
Very Few Vents
Use of very few vents typically results in hot and cold spots. If you notice that your system has vast expanses which have no returns, this might mean that air is being sucked back into your system. Placement of your return vents in covered and out-of-sight areas also restricts return air supply.
An air conditioning unit is a complicated system comprising many parts and aspects. Any issues with the installation of these parts affect your entire unit. The above ductwork design flaws affect not only your unit’s energy-efficiency and your indoor comfort but also its longevity.