The H-40-C is a self-contained unit, with the system cabinet measuring just 20" wide by 20" high by 12" deep. It requires only a source of potable tap water, a drain, and a grounded 115 or 230 volt electrical outlet in order to operate. The system can be bench, shelf or wall-mounted up to 20 feet away from the HOGEN® 20 or HOGEN® 40 system.

In order to accomodate a wide-variety of incoming tap water qualities, the H-40-C includes a built-in reverse osmosis (RO) pretreatment system capable of providing more than 25 gallons (95 liters) per day of RO purified water (that's approximately 4-8 times the capacity that the HOGEN 20® or HOGEN 40® requires). The H-40-C can run on tap water containing up to 1,000 PPM of total dissolved solids. The RO purified water is stored in a 4 gallon (15 liter) pressurized storage tank that sits on top of the system cabinet. The Type II DI portion of the system is fed from the RO storage tank.

A temperature-compensated purity sensor continuously monitors the quality of the purified water. It includes red and green LEDs that indicate the resistivity of the water as >2 megohm-cm (green LED is on), or <2 megohm-cm (red LED illuminates and an audible alarm sounds) indicating that it is time to replace the purification kit. The purification kit consists of an activated carbon prefilter cartridge and a DI module. The changeout can be done in just a few minutes, without disrupting the operation of the HOGEN® 40 system. The system price includes a spare purification kit.