This is a common question, but there’s no one-size-fits-all answer. It depends on several factors: Water Chillers: We recommend not running them continuously below 37°F. During testing, we reached 36°F with 5 gallons of water. Factors like your target temperature, liquid amount, and ambient conditions all affect how low your chiller can achieve. Glycol Chillers: Similar to water chillers, the lowest temperature depends on various factors. We recommend not running them continuously below 5°F, However in testing (with no heat load), we reached -15°F.