Siemens Building Technology 599 02023 Valve 326058 756 Upgrading to a 20kW heater Upgrading to a 20kW heater kit requires verifying that the existing blower motor can handle the static pressure and that the electrical service (breaker and wire gauge) is rated for the increased amperage draw of a 20kW load Efficient Air Usage: Optimized for a 45 SCIM air consumption and output flow capacity to maintain system pressure integrity this valve is engineered with a modified equal percentage flow characteristic to ensure stable modulating control of hot water It is compatible with Siemens MT Series electronic (proportional or floating) and pneumatic actuators with a 7 32 inch stroke