We offer a complete line of Heat Transfer Fluids that are ideal for a variety of applications, including new or existing solar hot water and solar heating systems. Heat Transfer Fluids are used in solar thermal systems as a freeze protection in colder, northern climates where temperatures can get low enough to freeze your solar loop if filled with just water.

The most popular and cost-effective heat transfer fluid for HelioMaxx solar hot water systems is Glycol (a safer form of anti-freeze) that is run between the solar collectors and the heat exchanger (separated from the potable water loop) to ensure safe, reliable year-round performance.