The EnviroSep Negative Pressure Semi-Instantaneous Steam-To-Water Heater Model # NSIWH is a manufactured, ready-to-install system designed to address the requirements of commercial potable water heating systems. Designed for high thermal efficiencies under varying load patterns, this system utilizes a fully modulating variable Pilot-operated Temperature Control Valve capable of handling steam pressures ranging from 5 to 150+ psig. This system operates below 0 psig*, delivering a reduction in energy consumption of 15-20%. Capable of handling a wide range of water flowrates and temperatures, while being Custom-tailored to your specific site needs, makes this system an ideal choice for either New or Retrofit installations.

* Note: Under most service conditions which are typical to potable water service.

Standard Features:

• ASME, Stainless Steel Hot Water Buffer Tank, with U-stamp
• Self-contained, Pilot-operated or Pneumatic Modulating Steam Control Valves
• High Temperature Cut-off Switch, for Independent Source Steam Isolation
• Secondary High Temperature Purge System, with Blowdown Controls
• Internal Circulation Pump
• Inlet Steam Condensate Removal
• Pump/Trap with Receiver
• Float & Thermostatic Steam Trap
• Outlet Temperature Indication
• Safety Relief Valves
• Removable Tube Section