Bell & Gossett SystemSyzer is an HVAC tool designed to assist with piping system design. Originally introduced in 1963, it has since been distributed to over a hundred thousand engineers and tradesmen. The application is based on the original plastic wheel calculator designed by Gil Carlson of Bell & Gossett.

The Circuit Setter® / Triple Duty Valve calculator is bundled with the tool, which is very useful for balance contractors. It can be used during the design phase to predetermine valve settings and in the field to determine flow through the valves based on pressure drop readings.