The MARS 12078 is a round-case design

This Baso Gas Products manufactured valve (often cross-referenced as Trane VAL01917) is intended for use with natural gas or propane

allowing your HVAC system to maintain consistent indoor temperatures while significantly reducing energy consumption

This ProTech gas control unit functions as a critical safety and operational component

and MSZ-D30NA

Siemens Building Technology 331-2904 Actuator 321142-301 The MARS 12078 is aThe Siemens 331 2904 is a heavy duty #4 pneumatic damper actuator designed for the gradual or positive actuation of large dampers in commercial ventilating systems. This piston type actuator features an all metal body construction and is specifically UL recognized for high stakes fire and smoke applications. With a 3 7 psi spring range and a generous 4 inch stroke, it provides the necessary force for reliable operation of outdoor air, return air, and