Repair pages should make the phone path obvious. Maintenance pages need a calmer reason to act before a breakdown. Replacement pages need proof, financing or estimate cues if you offer them, and enough detail to keep high-value jobs from shopping only on price.
Paid campaigns should respect the season. Running the same offer across emergency repair, tune-ups, and replacement work usually blurs the signal your office needs to make a good decision.
If you are comparing HVAC PPC agencies, the practical question is whether paid search and social traffic land on pages your team can honor by ZIP, season, and job type. We scope paid work after the audit shows the site can carry the click, with landing paths tied to repair, tune-up, and replacement intent, not a generic services page.