There are many benefits to having AC in your Seattle area home. With increasingly hot summers and the rising risk of wildfires, air conditioning units will help provide cool, clean air for your family. If you currently have heat but not air conditioning, you will most likely need to install a new HVAC system, or else place individual air conditioning units such as mini-splits, throughout your home. The age and configuration of many existing heating systems mean they cannot be easily retrofitted to include air conditioning. Replacing a heating system with a full HVAC system might also require larger ductwork and more robust return air and supply vents.