TinnerFlow™2nd YearSystems & Controls
A 2-pipe system shares supply and return piping for heating and cooling — it can only heat or cool at one time. A 4-pipe system has separate circuits and…
A 2-pipe system shares supply and return piping for heating and cooling — it can only heat or cool at one time. A 4-pipe system has separate circuits and can heat and cool simultaneously. The difference affects your piping connections completely.
Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.