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

Healthcare Gallery
Spirovent® and Spirotrap® separators are installed in hundreds of hospital and medical centers throughout North America.
Silence is Golden (Yellow) for Berners-Schober
“The pumps are much quieter as is the circulating water
International ALERT Academy, Big Sandy, TX

“I have not had to vent a coil in the three months since

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.