Winter no-heat searches are a large share of your organic year
Atlanta has real heating demand, so the search calendar has two peaks rather than one long cooling season.
The metro gets cold enough that furnaces, heat pumps stuck in defrost and frozen condensate lines all produce genuine query volume. Contractors who came up in a cooling-only market tend to underbuild the winter half of the site, then wonder why October and November go quiet.
Timing matters more than volume. Heating content should be written and published in late summer, cooling content in late winter. Pages need time to get crawled, linked from other pages on your own site and revised once before the season they were built for arrives.
Two peaks also create two shoulder seasons, and the shoulders are where organic earns its keep. Nobody researches a system replacement in the middle of a heat wave. They research it in April and in September, when the last bill was ugly and the decision is not urgent.
A single combined heating and air page cannot carry both halves. Split it, and give each side its own symptom pages, its own equipment pages and its own maintenance content.