Although the HVAC system gets the blame the majority of the time when your home doesn’t heat or cool as it used to, there are times when the HVAC system is NOT the issue. It is possible to ensure that your Air Conditioner and ductwork are installed and sealed properly, only to find that your outdated windows are no longer as energy efficient as they were when they were originally placed in your home. The same goes for your home settling over time. It can create gaps, cracks, or holes in the envelope of your home that will lower the energy efficiency of the building and increase the heat load placed on your HVAC unit. It may be necessary to find a contractor that can help evaluate your home and determine if any modifications are needed.