11.07.2025

Winterizing with DOWFROST™

Winterizing with DOWFROST™

As temperatures drop, it’s essential to prepare your systems for the freezing months ahead. Avoid emergency repairs by prepping before the first freeze. Glycol-based heat transfer fluids reduce cracks, leaks, corrosion, and complete system failures by dropping water’s freezing point and protecting components for dependable winter performance.   

Common Winterizing Applications:  

Boilers and chillers: Ensures water loops in HVAC systems don’t freeze when idle or operating intermittently   

Irrigation systems: Protects valves and lines from cracking during the winter months   

Solar heating systems: Maintain fluid flow through collectors exposed to outdoor temperatures  

Cabins and vacation homes: Prevents plumbing lines and pumps from freezing in unheated spaces  

Fire suppression systems: Protects dry or pre-action sprinkler lines in unheated or partially heated areas   

Choosing the Right Glycol for Your System:   

DOWFROST™  

FDA approved for incidental food contact, making it ideal for food and beverage processing or any application where a food-grade heat transfer fluid is required. It’s specially designed inhibitor package helps prevent corrosion and extend system life.  

DOWFROST™ HD  

Engineered for demanding, non-food applications, DOWFROST™ HD offers robust corrosion protection and superior performance under high-temperature and heavy-duty operating conditions. It’s well-suited for systems with copper components.  

DOWCAL™ 200  

Specially formulated for systems containing aluminum components, DOWCAL™ 200 features low acute toxicity. It’s ideal for solar heating, floor heating, snow melting, and heat recovery applications.  

For systems containing more than 250 gallons of Dow heat transfer fluid, Dow provides complimentary annual laboratory analysis and reporting, helping ensure fluid quality and performance from season to season.  

To order DOWFROST™DOWFROST™ HD, or DOWCAL™ 200 glycol-based heat transfer fluids, contact our team at Orders@LentusLLC.com.

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