The evaporative to refrigerated conversion deserves its own campaign
A homeowner replacing a swamp cooler with central air is a different buyer, a different budget and a much slower decision than someone with no heat tonight.
Conversion searches start in spring and finish weeks later. The job needs an estimate visit, usually some electrical work, and often a conversation about the ductwork. Bidding it inside a general cooling campaign hands the money to whichever keyword clicks fastest, which is rarely the one that sells a system.
Give it a campaign, a landing page and a daily budget of its own, and give reporting a longer window, since a household can take weeks to sign. Judging that campaign on a seven day conversion window will make good spend look broken.
Emergency no-heat gets its own campaign with a tight schedule and phone-first ads. Keep the two apart so an October cold snap does not eat the money set aside for April conversions.
A third, smaller bucket covers maintenance and indoor air, including humidification. Cheap clicks, modest volume, and it feeds the membership base that carries the slow weeks.