Ask five vendors how often PTAC units should be cleaned and you'll get five answers. The truth is the schedule depends on how hard your units work and what they're pulling in. Here's a framework that holds up across hotels, dorms, senior living and multifamily properties.
Monthly: filter service
Filters are the first line of defense. In occupied rooms, they should be checked and cleaned or replaced every 30 days. High-occupancy properties and buildings near construction or heavy traffic may need a shorter cycle.
Annually (minimum): full deep clean
Every unit should get a complete deep clean at least once a year: chassis pulled, coils flushed, blower wheel removed and scrubbed, drain pan cleared and sanitized, and performance tested. Properties with year-round occupancy, pets, or kitchens in-room should move to a semi-annual cycle.
By property type
Hotels and extended stay: semi-annual deep cleans keep guest-room air fresh and reviews clean. Student housing: schedule deep cleans during summer turnover, and a second pass mid-year for high-use buildings. Senior living: semi-annual service with sanitizing, since air quality directly affects resident health. Multifamily: annual, timed to spring or fall when systems switch modes.
Signs you're overdue
Musty smells when the unit starts, weak airflow, longer run times, visible dust on the discharge grille, water in or around the unit, and rising energy costs are all signals that cleaning is past due — not things to add to next quarter's list.
Want to know the condition of your equipment inventory?
A-TAC maintains PTAC, VTAC, water-source heat pump and mini-split systems across the NYC metro area — New York City, nearby New Jersey, Westchester and Long Island. We can assess a representative sample of units or the full inventory and report what we find.