Install the Spirovent® at the point of lowest solubility, which is the place in the system where the temperature is the highest and pressure the lowest. Note as well to always "pump away" from the expansion tank, never towards it.

Related Work

Silence is Golden (Yellow) for Berners-Schober
“The pumps are much quieter as is the circulating water
Maine Medical Center - Augusta, ME
Three of the larger Spirotherm® products on this multi-system project.
University of Nebraska - Lincoln, NE
With close to one hundred Spirovents installed, The University of Nebraska at Lincoln is one of our largest higher-ed customers.
Residential Gallery
Spirovent® remains the world class standard that others attempt to reach. Often copied but never equaled.