How Long Does The Ardent FX Take To Cool down? Alan Bueno March 16, 2023 01:51 Updated A complete cycle with a cooldown is approximately 90 minutes to two hours. Related to Ardent FAQs Related articles How Long Does Each Cycle Run For The Fx? How Much Can An Ardent FX Decarb At A Time? Should I Decarb Flower With The Silicone Sleeve In Or Not? Comments 0 comments Article is closed for comments.