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
Residential Gallery
Spirovent® remains the world class standard that others attempt to reach. Often copied but never equaled.
University of Michigan - Ann Arbor, MI
Replacing the old style centrifugal separator after two years of unsatisfactory system performance, the Spirovent solved the problems within two months.
Maine Medical Center - Augusta, ME
Three of the larger Spirotherm® products on this multi-system project.