The DeLonghi PAC N135EC 3A is a powerful, portable 13,500 BTU (ASHRAE) 3-in-1 air conditioner (cooling, fan, dehumidifier) for rooms up to 500 sq. ft., featuring quiet mode, R410A refrigerant, remote control, and no-drip technology that recycles condensation to avoid bucket emptying. Key aspects include its ease of setup (no tools), energy efficiency by cooling specific rooms, and troubleshooting for common water leaks, often from clogged drains or dirty filters.