What kind of glycol is used in heating systems?
What kind of glycol is used in heating systems?
There are two basic types of glycols used in HVAC systems, propylene glycol and ethylene glycol. Both of these fluids have similar freeze protection and heat transfer characteristics with the main difference being that propylene glycol has a lower toxicity level.
Should I put glycol in my heating system?
Do use glycol if there is a freeze potential. Snowmelts, hydronic air coils in attics, and vacation homes that are prone to power outages are good examples of systems that need glycol, according to Bob “Hot Rod” Rohr, trainer for Caleffi North America.
How long does glycol last in heating system?
three to five-year
While most non-inhibited glycol products have a three to five-year lifespan, pre-mixed Sentinel X500 glycol can provide up to 20 years of service before needing replacement.
What are the 2 types of glycol?
There are two main types of glycol used for this function: ethylene and propylene.
Can I run glycol in a hot water heater?
Water and glycol mixtures have a better heat capacity than oils and perform well in many types of heaters. There are temperature limitations relative to thermal oils, but within the right range, a water-glycol solution is an excellent choice.
How much glycol do I add to my 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.
How often does glycol need to be replaced?
“Some of our customers have had the same glycol in their systems for thirty years, some have had to replace or add after only five years – it’s totally unique to the facility.” However, HOH recommends testing at least once a year to ensure that proper levels are being maintained and that you really are protected.
What type of glycol is used in a hydronic system?
Ethylene Glycol Propylene Glycol
Anti-Freeze in Hydronic Systems
| Ethylene Glycol | Propylene Glycol | |
|---|---|---|
| 180F | 123% | 123% |
| Specific Gravity @ STP | 1.125 -1.135 | 1.045 -1.055 |
| Pounds/Gallon @ 60 | 9.42 | 8.77 |
| pH (of glycol concentrate) | 9.3 | 9.5 |
Is glycol flammable?
FIRE FIGHTING INFORMATION: Ethylene glycol is combustible. Extinguish fires using an agent suitable for the type of surrounding fire. Use “alcohol” foam, dry chemical, or carbon dioxide. Keep run-off water out of sewers and water sources.
