Find out which half you need.
Two questions — what you already have, and who uses it.
Water chillers and glycol chillers are not interchangeable
A water chiller cools plunge water directly and bottoms out around 37°F. A glycol chiller circulates a glycol and water mixture to reach 28°F and, per Penguin's own product pages, is not used for chilling plunge water directly.
Glycol units are listed in their own collection rather than here, so a sub-freezing loop chiller is never mistaken for a plunge chiller. If you are outfitting something other than a plunge, that is where to look.
What the research actually says
Our view at InfraCore: cold water immersion and whole-body cryotherapy are studied separately and should be described separately, and we would rather send you to the evidence than summarise it in a sentence on a product page.
Our Wellness Library covers it directly: The Cold Case — What Cryotherapy Chambers and Cold Plunges Actually Do to the Body, Cold Plunge vs. Cryotherapy, and Contrast Therapy: How Hot and Cold Work Together.
How to size a chiller
Our view at InfraCore: capacity cannot be read off the tub size alone. Water volume, room temperature and how well the tub is insulated all move the answer, and Penguin does not publish a gallons-to-BTU chart we could hand you.
So we do not guess at it. Tell us the tub and we will confirm the model before you order — and if the one you picked is wrong for it, we will say so. The Cold Plunge Finder narrows it to a shortlist in two questions.
What every cold plunge here includes
Free freight shipping within the continental US. Direct concierge support before and after purchase. Every unit runs on a standard 110–120V household outlet, so nothing here requires a subpanel install to switch on.
InfraCore Wellness is a wellness equipment retailer, not a medical provider. The information on this page is for educational and wellness purposes only, is not medical advice, and is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary. Always consult your primary care physician before starting any new wellness routine, especially if you have an existing medical condition, are pregnant, or take medication.
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