Nortec's ME Series - 
An Innovative Evaporative Humidifier

The new Nortec ME Series evaporative humidifier / cooler, offers low energy humidification and evaporative cooling to an air handling unit or duct. Its innovative and patented features position it firmly as the World’s leading humidifier of its type. A single unit can deliver up to 2,200 lns/hr of moisture and 630kW of evaporative cooling to an air stream.

The ME Series consists of an evaporative module that is located inside the duct, a patented self-contained hydraulic unit and an intuitive touch-screen control panel. The hydraulic unit pumps water to the top of the evaporative module where it flows down the corrugated surface of its evaporative media. As air passes through the wetted media it is humidified and cooled.

The Nortec ME has a patented compact, self-contained hydraulic unit that incorporates a water tank, up to five pumps and a pump assisted drain. It can be mounted on the evaporative module inside the AHU or externally on the outside wall. Exterior mounting meets UL requirements and enables service work to be carried out without AHU
downtime. Interior mounting minimizes installation requirements. The innovative hydraulic unit is delivered fully assembled and has simple push-fit pipe connections, finger release screws and hand tightened pump mounts for easy servicing. The full
hydraulic unit or any of its individual components can be removed and exchanged in minutes making the Nortec ME ideal for critical applications that require minimal downtime. Low voltage components in the hydraulic unit increase safety for
engineers working with the system.


The system’s water pumps, each incorporating 32W magnetic drive impellors, allow the ME to provide up to five-stage control as standard. Unlike other evaporative humidifiers that use a large single pump, typically needing around 400W, the Nortec ME’s multiple low energy pumps keep its energy consumption proportional to the required output. Also, as the ME’s pumps have no mechanically connected parts they provide exceptionally quiet operation that is barely audible.

Other features of the Nortec ME’s hydraulic unit include a pumped drain that improves humidity control by returning the system to full output more rapidly, water conductivity and temperature sensors, push-fit connections, finger release screws and hand tightened pump mounts for easy servicing. The top of the water tank can be removed in seconds providing access for cleaning without any further disassembly required. The complete hydraulic unit can be quickly disconnected and replaced making the ME Series ideal for critical applications that demand minimal downtime and redundancy planning.

The water tray of the evaporative module, located inside the AHU, can be fitted with a submerged UV water purifier. This provides continuous UV purification to the water flowing around the humidifier and continues to be effective even when there is no demand for humidity control and the pumps aren't operating. This is a more effective water treatment solution than systems fitted to water supply lines or on re-circulating hoses. Other hygiene features include drain and flush cycles to ensure water cannot remain in the system, double creased tanks to ensure 100% drainage and hydraulic module impregnation with Biomaster antimicrobial additive.

The Nortec ME incorporates an advanced touch screen controller that makes the system easy to use and set up with software based commissioning. Information is
displayed on settings and the current conditions of air humidity and temperature as well as the water level, temperature and conductivity. Service requirements and fault
warnings are displayed and recorded for future reference, and can also be
downloaded via a USB connection. Intelligent Q&A-based trouble shooting guides walk the user through issues to help identify problems and resolve them. The system can connect to a BMS (BACnet, Modbus and LonWorks protocols with optional PCB)
and the software can be updated via its USB port.

A major benefit of evaporative humidification is that it provides instant evaporation without any required absorption distance in the AHU. This allows it to be fitted in very short section lengths without any risk of wetting inside the duct. It can run on mains water without the need for RO water treatment. As there is no need to heat the water it can be much more economical to run than electric steam humidifiers. Regular flush cycles remove minerals from the system making this a low maintenance option.

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