Fernox Antifreeze Protector Alphi-11 is a combined antifreeze and corrosion inhibitor based on mono-propylene glycol—a safer, food-grade glycol formulated to protect heating, chilled water, geothermal, and data center cooling systems, including those with aluminum heat exchangers, from frost, corrosion, and limescale.
Unlike many antifreezes, Fernox Antifreeze Protector Alphi-11 does not contain phosphates, nitrates, or 2-ethylhexanoic acid. These additives are often why many glycols carry hazard warnings—because they can be hazardous to health and harmful to the environment.
Fernox Antifreeze Protector Alphi-11 offers a non-toxic, NSF HT1-certified formulation, safe for incidental food contact and ready to use with municipal/ city water.
It’s pH-stable, environmentally responsible, and safe for the installer and the system.

• No need for a winter system drain down
• NSF HT1 registered product – certified safe for ‘incidental food contact’ and ideal for use with single walled heat exchangers
• Compatible with all metals and materials commonly found in a hydronic heating system
• Environmentally friendly formulation: Nitrite, Nitrate, Phosphate and EDTA free
• Available as full strength and premix
• pH level in concentration: 7.0-7.7
  pH level in solution: 7.0-7.8