An HVAC contractor called in to solve a comfort problem will usually first address the equipment. Some stop there, but more progressive contractors then look at the ductwork. Finally, comes the insulation.
HVAC equipment exists within an ecosystem, and these last two items make up part of that. The HVAC equipment moves the air within the house, but that air travels in and out of the structure on its own. That’s why it’s crucial to look at the whole picture, said David Richardson, director of technical curriculum and instructor at the National Comfort Institute.