Do I really need a three-prong outlet? December 03, 2024 17:14 Updated Yes, the All-Weather 120V heat pump requires a three-prong outlet. Related articles Can I use a three-prong adaptor? How loud is the All-Weather 120V heat pump during operation? What is the airflow capacity of the All-Weather 120V heat pump? Do I need Wi-Fi to use the All-Weather 120V heat pump unit? Is Wi-Fi connectivity available for the All-Weather 120V™?