Generally, nothing affects the efficiency of an heating and A/C system more than a home’s insulation quality, then insulation simply works by slowing down the move of heat from one point to another. This translates to reduced daily energy bills, and choosing the right insulation can entirely transform the functionality of your air conditioner and heating unit, and good insulation minimizes the amount of energy your heating and A/C system requires to heat or cool the air in your home. Invest in passable insulation for both the attic and walls if you intend to increase your heating and A/C unit’s efficiency. Contact your heating and A/C professional to discuss how much of the insulation should be appropriate for the air conditioner device installed in your home. This is significantly more pressing in case you have limited funding. If you can afford to go full-blown, consider insulating all areas, including walls, attic and floors, and focus on the attic more since a more significant percentage of heat and cool air escapes through the attic. The structuring of the apartment may also determine if wall insulation is an opportunity, but wall insulation depends on how the home was initially built. You can opt for foam insulation if you want wall insulation that is both strong and affordable. If the opportunity to add more insulation presents itself, then the attic should be your focus. Insulation also helps the heating and A/C’s HVAC duct and increases its efficiency, but usually, when the ducts run through uninsulated areas in the house, they are wrapped in insulating material. Heating and A/C companies plus experts use fiberglass materials to insulate these ducts and minimize heat loss.