Glycol, also called antifreeze, is an important compound that HVAC manufacturers use to protect hydronic heating systems in cold climates. When added to water, glycol lowers the freezing temperature of the resulting mixture, ensuring that it remains liquid even during harsh winter weather.
How long does glycol last in a heating system?
Dynalene's customers have systems where the glycol has lasted for more than 15 years. In certain very high temp systems (> 300°F), the glycol may last only a few years. The pH and the inhibitor concentration or reserve alkalinity must be maintained for a glycol to have a prolonged life.Dec 22, 2015
How often does glycol need to be replaced?
roughly once per year
Is glycol bad for a boiler?
Glycol in a hydronic system impacts the way that many circuit components such as pumps, pipes, air eliminators and boilers work. If the wrong choices are made there can be serious consequences to the efficiency, performance and longevity of the system.
Can glycol be used for heating?
Using Glycol in Industrial Heating System Applications Ethylene and propylene glycol are commonly used in industrial facilities for process cooling. However, they are also used in process heating systems. They are very effective in heating applications due to several properties, such as: High specific heat capacity.May 18, 2021
Is glycol used for heating or cooling?
Glycol is a water-miscible coolant that is frequently used in heat transfer and cooling applications. It provides better heat transfer parameters than water, and can be mixed with water to provide a variety of heat transfer characteristics.Apr 18, 2016
What can Glycol be used for?
Ethylene glycol is a chemical commonly used in many commercial and industrial applications including antifreeze and coolant. Ethylene glycol helps keep your car's engine from freezing in the winter and acts as a coolant to reduce overheating in the summer.
Can you put glycol in a boiler?
Heating boiler antifreeze, usually a non-toxic polypropylene glycol anti-freeze and water mixture is installed in hot water heating boilers and plumbing systems to reduce the risk of expensive freeze damage to the heating system piping and of course to avoid costly water or even mold contamination that occurs when an ...
Is glycol harmful to humans?
Ethylene glycol is highly toxic to humans and is not used in food products. Summary Propylene glycol is a synthetic, colorless, odorless, tasteless liquid that belongs to the same chemical class as alcohol.Mar 2, 2018
How much glycol is in a heating system?
Q: How much glycol should I add to the system? A: Boiler manufacturers often advise that glycol should make up no more than 50 percent of the system's volume, with some high-efficiency boiler applications reduced to 35 percent.Jul 2, 2019
How much glycol do you put in a chilled water system?
Never use less than 25% Glycol, this will ensure that an adequate quantity of inhibitors are present. Never over-mix – use only the glycol concentration necessary to protect the equipment.Sep 8, 2016
What percentage is glycol?
Outdoor Temperature Propylene % of Glycol Required
------------------- ------------------------------
-5 20
-12 10
-18 0
-23 -10