Watch the local pattern
Inspect the exterior from a safe position more often when cottonwood is shedding. Record how long it takes for a visible layer to return after cleaning and whether it collects on one side or behind panels.
Keep the surrounding area free of loose debris and vegetation within the manufacturer's required clearance. Carrier notes that debris can block condenser airflow and that higher-dust conditions can call for more frequent care. Carrier cleaning guidance.
An annual appointment may not be enough to catch a heavy buildup that happens over a short period. That does not mean every household needs the same added service schedule. Your observations should guide the interval.
Check prevention ideas before buying
Ask the equipment manufacturer or qualified provider whether an accessory screen, guard, or other prevention product is approved for the exact model. Have them explain required clearance, airflow effects, cleaning needs, and any warranty implications.
Do not use fabric, fine mesh, or a solid cover over an operating unit just because it catches cottonwood. A cover intended for storage or seasonal shutdown does not establish permission to use it during cooling.
Tree work or changes to the nearby landscape may be relevant, but should be evaluated by the appropriate property or tree-care professional. Do not assume removing a tree is necessary or that it will eliminate all airborne debris.
Set an owner and service routine
Follow the unit's instructions for owner-accessible care. If fluff sits behind panels or needs deep cleaning, have the HVAC provider handle that access. Avoid pressure washing or scraping fins.
Ask for a simple written plan: what to inspect, the approved cleaning method, the point at which service is needed, and whom to call if cooling declines. If weak cooling or unusual noise develops, request diagnosis as well as cleaning.
Your next step is to share photos and the buildup interval with the provider. Choose prevention only if it is approved for the equipment, and use inspections during shedding season to catch the next layer early. The aim is clear airflow with care you can sustain, not a barrier that trades cottonwood for another restriction.