APRIL CALPRO is a superior quality propylene glycol heat transfer fluid perfect for HVAC (Heating, Ventilation and Air Conditioning), ice rinks, food and beverage processing, pharma processing, process heating and cooling, sidewalk and playing field subsurface heating and computer cooling systems. It is NSF (National Science Foundation) HT-1 and CFIA (Canadian Food Inspection Agency) approved for incidental food contact.