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5 Hot Water Heating Systems Hot Water Heaters – Unfired Instantaneous Steam-to-Hot Water Heater (IWH) Instantaneous Water Heater – Plate & Frame (IWH-PF) Instantaneous Water-to-Water Hot Water Heater (IWH-WW) Instantaneous Water Heater – Custom Engineered (IWH-C) Semi-Instantaneous Steam-to-Hot Water Heater (SIWH) Closed-Loop, Semi-Instantaneous Steam-to-Hot Water Heater (NSIWH) Storage Tank Water Heaters (STWH) Hot Water Converters Heat Transfer Unit (HTU) Heat Transfer Unit with Steam-powered Condensate Pump (HTUP) Closed-Loop Heat Transfer Unit with Steam-powered Condensate Pump (HTUC) Heat Transfer Unit with Plate & Frame Heat Exchanger (HTU-PF)

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7 » Domestic Water Booster Pump Systems

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Instantaneous Steam-to-Hot Water Heater

The EnviroSep Model IWH, Instantaneous Steam-To-Water Heater is a simple and accurate manufactured, ready-to-install system designed to address the requirements of commercial potable water heating systems. Designed to utilize steam as the heat source, the steam is supplied to the heater at a predetermined 2 to 60 psig (depending on required output). Blended Cold Water and Hot Water (Loop) Return is supplied to the heater and the Hot Water Supply is set through a manual Temperature Control Valve. The Model IWH is constructed of Stainless Steel, Copper, and Bronze components suitable for domestic water use. 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.

View detailed information on Instantaneous Steam-to-Hot Water Heaters (PDF)

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Typical Piping Arrangement

Standard Construction

• Enamel-coated Steel Housing
• Bronze Gate Valves
• Stainless Steel Heater Surface
• Float & Thermostatic Steam Trap with Stainless Steel Internal Parts
• All Copper piping
• Hydrostatically Tested

System Options

• Bronze Ball Valves
• Digital Temperature Indicator w/ adjustable over-temp cutout
• Modulating Steam Control Valve
• Circulator Pump w/ Isolation Valves
• Digital, Pneumatic Temperature Control Valves
• Steam Pressure Reducing Valve w/ Y-Strainer
• Relief Valve
• Pre-piped Circulator / Make-up Assembly
• Steam-powered Condensate Pump