It’s not the professional way to select a circulator.
Hydronic heating pros get to shoot at specialized targets all year round. The center of their bull’s eye might be a specific temperature or flow rate within each system they design. They use skill, dedication and the right tools to make their shot (the installed heating system) hit as close as possible to the bull’s eye (the intended operating conditions). Let’s review the “classic” procedure for making each of those shots count the first time.