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Geothermal Heating

PG/EG Antifreeze Calculator


Use this calculator to quickly determine the approximate amount of Glycol and Deionized water to use in your system.


%
gallons
gallons
gallons

Calculations are intended to provide an estimate and should not be solely relied upon. The fluid should always be tested with a glycol refractometer to verify freeze protection. 

Fluid remaining in the system after cleaning and flushing can dilute newly added glycol. Therefore, it is recommended that 5-10% more glycol be added than required to allow for dilution.