Water Specifications for chambers with Added Humidity For humidifier-equipped chambers, we recommend use of either Darwin's WFS4 filtration system, or a reverse osmosis system, so that the following water quality requirements are met: conductivity of 0.1 to 10 µS, TDS of < 10 ppm, and 1-10 Pounds per Square Inch (PSI) of water pressure. Humidifier water to be provided by owner within 5’ of the chamber and terminated in ½” FPT shut-off valve. Chamber shall utilize ¼” polyethylene tubing from the shut-off valve to the inlet connection side of the humidifier. Water Filtration System for Humidifier-Equipped Chambers The water filtration system we use if your building water doesn’t meet our specifications is a WFS4. The WFS4 is a 6-stage Reverse Osmosis filtration system with double DI filters with a 3.2 gallon Reverse Osmosis tank. With a capacity of 10-50 gallons per day, the WFS4 includes spare filters that will provide a 2-4 year supply or 6000 gallon filtration capability. The WFS4 also includes a TDS meter to allow for periodic water quality verifications and a purified water pressure regulator to reduce the outlet water pressure to meet Darwin Chambers specifications. In addition, the WFS4 utilizes an auto shut-off valve to limit wastewater to 2.5 gallons of wastewater per one gallon of purified water. A 40PSI to 75 PSI regulated inlet water pressure is required for proper auto shut-off valve functionality. The use of water softening systems using salts should not be utilized pre or post the filtration system. Therefore, use of a water softener will void the chamber warranty. WFS Spec Sheet WFS4 Water Flow Diagram WFS4 Manual Compressed Air Requirements for Reach In Chambers with Humidity Control A (customer facility supplied) compressor capable of providing 200 PSI is recommended for use on our chambers, as the chambers themselves require a regulated air pressure of 70 PSI for optimal performance. This air source should be stripped of moisture with some form of dryer or filter to ensure the line does not become saturated with moisture. Additionally, a scroll compressor is recommended for the continued performance and supply of air to the unit, but this is not mandatory. We make no further specifications or other recommendations beyond these items. The air supply connection uses ¼” OD polyethylene tubing.Tanks of compressed air not acceptable A (customer facility supplied) compressor capable of providing 5 sCFM of air at 70-90 PSI (For single Chamber needing dry air), is recommended for use on our chambers. ( chamber requires max of 3.3 sCFM) This air source should be stripped of moisture with some form of dryer and filter to ensure the line does not become saturated with moisture and debris. The compressed dried air must have a dew point lower than the desired chamber set point. We make no further specifications or other recommendations ( Tank size, duty cycle, dB, Electric power, or HP). The air supply connection uses ¼” OD polyethylene tubing. Tanks of compressed air not acceptable for long term use. Chamber set points that are lower dew points than ambient conditions will require longer run times than chambers having a dew point at or above ambient dew point, for air compressors. Compressors not meeting these specifications could cause more compressor ware and longer recovery times for chamber to reach set point and/ or performance. For multiple chambers use (Chamber MAX sCFM) 3.3 * Amount of Chambers * 1.5 = sCFM needed. Flow rate is adjustable per chamber. Less sCFM helps to prevent overshoot. More sCFM to achieve lower dew point rapidly. This is derived from the capable flow rate with current flow meter and typical compressor sizing formula. https://www.campbellhausfeld.com/understanding-air-compressor-ratings.html Desiccant Dryer Connection for Reach In Chambers Desiccant Dryer Connection Tech Support Contact Information Text or call us at: 314-207-5885 Email: technicalsupport@darwinchambers.com Parts Contact Information Text or call us at: 314-207-5884 Email: parts@darwinchambers.com