Hydraulic Configuration Precheck
Do you need a buffer tank or hydraulic separation?
Check why a buffer may be needed: active water volume, minimum flow, multiple circuits, independent pumps or mixed temperatures. This tool does not use a universal litres-per-kW rule.
Hydraulic configuration
Important: adding water volume and providing hydraulic separation are different design problems. Connection arrangement and truly active water volume matter, not only the nominal tank litres.