Heat transfer fluid specially formulate for Geothermal systems. ComStar offers propylene glycol (PG), ethanol (E) and methanol (M) geothermal heat transfer fluids; all of which meet specifications by geothermal system OEM's. They are available in super concentration or ready to use (RTU) versions. Each fluid has one of the following characteristics:

• Geothermal-PG: Non-toxic, non-flammable, biodegradable with metal corrosion inhibitor, particle suspension package to protect aluminum system components and is colored fluorescent green for easy leak detection
• Geothermal-E: Non-toxic, biodegradable, flammable with metal corrosion inhibitor, particle suspension package to protect aluminum system components
• Geothermal-M: Flammable and considered poisonous with metal corrosion inhibitor, particle suspension package to protect aluminum system component
Geothermal-E, Ethanol Heat Transfer Fluid, 55 Gallons