HVAC demand is shaped like two mountains with valleys between them. The peaks bring emergency calls you don't need to advertise for. The valleys are where marketing earns its keep.
Shoulder months: sell maintenance
Spring and fall are the best time to promote tune-ups and maintenance plans. Technicians have capacity, homeowners aren't panicking, and every plan sold smooths next year's cash flow.
Peaks: be easy to reach
When the first heat wave hits, the job of your ads is simple: say you're available, show the phone number, and say how night and weekend calls work. Keep this creative approved and ready to switch on.
Replacement: earn the estimate
High-ticket replacements are researched. Offer something low-risk — a free second opinion, a written quote — rather than a price you can't honor before seeing the home. Don't advertise efficiency savings without the system details to back them.
What to measure
Track maintenance-plan sign-ups separately from repair calls, and replacement estimates separately from emergency service. They have different values and different timelines.
See the HVAC industry page for example creatives and the seasonal planner for your climate.