Ventika SOLO+ MVHR wall heat recovery kit for single room use in 100mm duct size. This MVHR unit is an effective, energy-saving ventilation system for bathroom, kitchen or toilet which minimize heat losses, filters incoming air and maintain air humidity. It is design to install directly on the external wall. The flow rate of this unit is 30m3/h on first gear and 46 m3/h on second gear. The noise level is 27/32dBA at 3m. How the wall heat recover unit works?This device works in two 60-second cycles:1st cycle - Warm, stale air is removed from the room flows through the heat exchanger, transferring heat and moisture. After 60 seconds of heating the heat exchanger, the ventilation unit switches to the supply mode.2nd cycle - Fresh, cool air from outside flows through the heat exchanger. The air is humidified and heated by the heat previously collected in the exchanger. After 60 seconds, the fan switches back to exhaust mode and the cycle repeats. Humidity sensor function:The operation of the device can be controlled using a humidity sensor. Using the included plastic screwdriver, set the required humidity level on the potentiometer in the range of 60-90%. If the humidity in the room exceeds the set value, the device automatically turns on and works until the humidity returns to normal. Installation:The MVHR needs to be installed through external wall.Kit contains: 2-way extractor fan, 380mm duct pipe (can be shortened to min 305mm), External hood cover, ceramic heat exchanger, air filter, humidity sensor.