2-Pipe vs 4-Pipe Configuration Checker

The one spec decision that changes the piping design, not just the unit — answer two questions to check which configuration your project needs.

1. Does any single zone need heating and cooling running at the same time as another zone (e.g. a sun-facing perimeter zone heating while an interior core zone cools)?

Yes, simultaneous heating & cooling needed No, one mode at a time buildingwide

2. Does the building switch between heating season and cooling season (not both running at once)?

Yes, seasonal switch only No, year-round mixed demand

Recommended configuration

Answer both questions above.

Confirm with our engineering team →

2-Pipe vs 4-Pipe Configuration Checker

Recommended configuration

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