--- title: Filling Mechanical Cooling Systems with Propylene Glycol description: Adding the right mixture of propylene glycol to a building’s HVAC system can help it work efficiently and protect it against frozen pipes. image: https://info.kellerheartt.com/hubfs/images/blog/mechanical%20cooling%20system.jpg --- [![keller-heartt-oil](https://info.kellerheartt.com/hubfs/branding/keller-heartt-logo.200.png)](https://www.kellerheartt.com/) - Shop By Industry - [Trucking & Automotive](https://www.kellerheartt.com/collections/commercial-truck-supplies) - [Diesel Exhaust Fluid](https://www.kellerheartt.com/collections/diesel-exhaust-fluid) - [Motor Oil](https://www.kellerheartt.com/collections/motor-oil) - [Brake Cleaner](https://www.kellerheartt.com/collections/brake-cleaner) - [Antifreeze](https://www.kellerheartt.com/collections/antifreeze-coolants) - [Transmission Fluid](https://www.kellerheartt.com/collections/transmission-fluid) - [Machine Shops & Metalworking](https://www.kellerheartt.com/collections/metalworking-fluids) - [Cutting Oil](https://www.kellerheartt.com/collections/cutting-oil) - [Coolant](https://www.kellerheartt.com/collections/tool-die-coolants) - [Hydraulic Oil](https://www.kellerheartt.com/collections/hydraulic-oil) - [Soluble Oil](https://www.kellerheartt.com/collections/soluble-oil) - [Rust Preventative](https://www.kellerheartt.com/collections/tool-die-rust-veto) - [Industrial](https://www.kellerheartt.com/collections/industrial-products) - [Hydraulic Oil](https://www.kellerheartt.com/collections/hydraulic-oil) - [Industrial Gear Oil](https://www.kellerheartt.com/collections/industrial-gear-oil-all-sizes-brands) - [Multi-Purpose Grease](https://www.kellerheartt.com/collections/multi-purpose-grease) - [Cleaner & Degreaser](https://www.kellerheartt.com/collections/industrial-cleaners-descalers-degreasers) - [Ethylene Glycol](https://www.kellerheartt.com/collections/ethylene-glycol) - [Food & Beverage](https://www.kellerheartt.com/collections/food-grade-oils-lubricants) - [Propylene Glycol](https://www.kellerheartt.com/collections/propylene-glycol-drums) - [Cassida Fluid & Grease](https://www.kellerheartt.com/collections/cassida-lubricants-greases) - [Fuchs Gear Oil & Grease](https://www.kellerheartt.com/collections/fuchs-lubricants) - Shop By Brand - [Shell Products](https://www.kellerheartt.com/collections/shell-oil-lubricants) - [TRUEGARD Products](https://www.kellerheartt.com/collections/truegard-oil-lubricants) - [Blue DEF Products](https://www.kellerheartt.com/collections/bluedef) - [Oil Eater Products](https://www.kellerheartt.com/collections/oil-eater) - [Blog](https://info.kellerheartt.com/blogs) - [Request a Quote](https://www.kellerheartt.com/pages/request-a-quote) [Contact Us](https://www.kellerheartt.com/pages/contact-us) Propylene Glycol # Filling Mechanical Cooling Systems with Propylene Glycol [Brian McGrath](https://info.kellerheartt.com/blogs/author/brian-mcgrath) Dec 15, 2023 --- Contractors of large buildings face unique challenges when it comes to maintaining efficient and reliable cooling systems. One key aspect of this maintenance is the proper filling of mechanical cooling systems with the right coolant mix. In this blog, we'll delve into the advantages of using [propylene glycol](https://info.kellerheartt.com/blogs/ethylene-glycol-vs.-propylene-glycol) coolant, exploring its benefits, and offering insights into the best practices for filling cooling systems in large-scale structures. *Resource: [Comparing Truegard® Propylene Glycol Vs. Dowfrost™](https://info.kellerheartt.com/blogs/comparing-truegard-propylene-glycol-vs-dowfrost)* ## The Power of Propylene Glycol Coolant ### 1. Efficient Heat Transfer Propylene glycol is renowned for its exceptional heat transfer capabilities. When used as a coolant in large building systems, it ensures that heat is efficiently absorbed and dissipated, contributing to optimal performance. ### 2. Low Freezing Point Unlike water-based coolants, propylene glycol has a lower freezing point, adding a layer of protection against sub-zero temperatures. This is particularly crucial for large buildings in regions with harsh winters. ### 3. Corrosion Protection The corrosion of metal components is a constant concern in cooling systems. Propylene glycol acts as a corrosion inhibitor, extending the lifespan of the system and minimizing maintenance costs. Read more: [The Benefits and Uses of Propylene Glycol](https://info.kellerheartt.com/blogs/benefits-and-uses-of-propylen-glycol) ## Best Practices for Filling Cooling Systems ### 1. Dilution Ratios Contractors must pay close attention to the recommended dilution ratios when preparing the propylene glycol coolant. This ensures optimal performance and prevents issues related to over-concentration or under-dilution. ### 2. System Purging Before filling the cooling system, a thorough purging of any air or debris is essential. This guarantees that the propylene glycol coolant mixture can circulate freely, maximizing its heat transfer efficiency. ### 3. Regular Monitoring Continuous monitoring of the coolant's concentration is crucial. Regular checks help contractors maintain the correct balance, preventing potential issues associated with improper dilution levels. ### 4. Professional Assistance Large buildings often have intricate cooling systems. Seeking the expertise of professionals who specialize in propylene glycol-filled systems ensures that the process is executed accurately and efficiently. By adhering to best practices, such as proper dilution ratios, system purging, and regular monitoring, contractors can ensure that propylene glycol coolant contributes to the longevity and efficiency of cooling systems in large structures. Embracing this approach not only enhances the performance of the cooling system, but also minimizes the risk of costly repairs and downtime, ultimately benefiting the bottom line of large buildings' operational costs. [![Download the Guide ►](https://no-cache.hubspot.com/cta/default/23289434/interactive-124633850189.png)](https://info.kellerheartt.com/hs/cta/wi/redirect?encryptedPayload=AVxigLJprMuWbcTg3MsXY4AxrrwJVeQgIZ3gcFL6LNi3PQH7ePKc5cfsyenIp09jUyEDYgjVtoY4BrasQIYAABnv66r1gQS3g%2B6XL4xk%2Br3PBGEexu2Tfzdro284tYJL64LDHVQ7Reoxq51XZOAiNMrtESbuaa9smY%2BFKArb2xmoy0M0ry4MdfRBCegwQSNNb9jhy8p2LvgI%2BfhBSDJAkVZtE7G%2FSFlnDFjWqM%2BGbg%3D%3D&webInteractiveContentId=124633850189&portalId=23289434) [Propylene Glycol](https://info.kellerheartt.com/blogs/tag/propylene-glycol) [Coolant](https://info.kellerheartt.com/blogs/tag/coolant) #### FOLLOW AND SHARE: [![share on facebook](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/facebook-color.png?width=45&height=45&name=facebook-color.png)](https://www.facebook.com/pages/Keller-Heartt-Company/170082969671892?ref=hl) [![follow us on youtube](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/youtube-color.png?width=45&height=45&name=youtube-color.png)](https://www.youtube.com/channel/UCA9e_Yo_qd4PqpK2dDdgxaw) [![follow us on instagram](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/instagram-color.png?width=45&height=45&name=instagram-color.png)](https://www.instagram.com/keller.heartt/?hl=en) [![follow us on twitter](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/twitter-color.png?width=45&height=45&name=twitter-color.png)](https://twitter.com/KellerHeartt) [![follow us on linkedin](https://info.kellerheartt.com/hs-fs/hubfs/images/social/icons/linkedin-color.png?width=45&height=45&name=linkedin-color.png)](https://www.linkedin.com/company/keller-heartt-oil/)   ## Similar posts Propylene Glycol ### [Top Four Questions About Food-Grade Glycol Answered](https://info.kellerheartt.com/blogs/top-four-questions-about-food-grade-glycol) Learn about food-grade glycol, what it is, and how to properly dispose of it. Brian McGrath May 12, 2023 Propylene Glycol ### [Food-Grade Lubricants: Ensuring Safety in the Consumer Goods Industry](https://info.kellerheartt.com/blogs/guide-to-food-grade-lubricants) Learn about food-grade lubricants and the required certifications for consumer use. Brian McGrath May 10, 2024 Propylene Glycol ### [Ethylene Glycol vs. Propylene Glycol](https://info.kellerheartt.com/blogs/ethylene-glycol-vs.-propylene-glycol) Learn the difference between Ethylen and Propylene Glycol Brian McGrath Nov 10, 2023 ## **Get the latest oil & lubricant industry insights** Subscribe to the Keller-Heartt blog so you can sharpen your industry knowledge, gather helpful tips, and stay informed about changes or updates in the oil provider landscape. ### Subscribe to Our Blog! © 2025 Keller-Heart Oil All rights reserved ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Brian McGrath", "url" : "https://info.kellerheartt.com/blogs/author/brian-mcgrath" }, "dateModified" : "2023-12-19T20:19:09.684Z", "datePublished" : "2023-12-15T20:18:00.000Z", "headline" : "Filling Mechanical Cooling Systems with Propylene Glycol", "image" : [ "https://info.kellerheartt.com/hubfs/images/blog/mechanical%20cooling%20system.jpg" ], "mainEntityOfPage" : { "@id" : "https://info.kellerheartt.com/blogs/filling-mechanical-cooling-systems-with-propylene-glycol", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://info.kellerheartt.com/hubfs/branding/keller-heartt-logo.350.png" }, "name" : "Keller-Heartt Co" } } ```