It provides healthy air by circulating indoor and outdoor air to maintain a pleasant indoor environment at all times, and at the same time recovers indoor cooling and heating energy.

It is an optimal ventilation solution that reduces energy costs. It is an air-type (air to air) heat recovery type ventilation system equipped with a heat exchange element and an air filter unit to recover heat between indoor and outdoor spaces, and the rated voltage is AC 600 V or less. and the rated air volume is less than 3,000 m3/h. As a result of developing and applying a sensorless BLDC MOTOR product that can 'zero' the occurrence of motor replacement service, we have reduced power consumption (W) by more than 10-20% compared to the previous one, and mechanical resonance noise is eliminated. We have developed a product that can significantly increase motor life by removing the PCB inside the motor and are applying it to mass production. Depending on the installation space of the waste heat recovery ventilator, it is sometimes difficult to replace the motor, which frequently causes damage to the product. The sensorless BLDC MOTOR product focused on developing the motor defect rate to zero to eliminate such difficult motor replacement work, and the built-in PCB and sensor were removed to prevent damage to the motor due to environmental factors (condensation, moisture). This succeeded in mounting the role of the removed part on the external driving main board, and also greatly improved efficiency and reduced mechanical noise by controlling the existing square wave control method with a step wave close to a sine wave. . Based on all these general contents, we currently have 7 intellectual property rights including patent registration (No. 10-2092783), and patent registration related to element technology is in progress through continuous technology development.

The heat recovery ventilator installed in the common area implements multi-control through the setting of master and slave equipment, and one room controller (Room_controller) installed in the master equipment can operate several slave equipment at the same time, so that the room controller in each room where the equipment is installed can be operated at the same time. Removed the inconvenience of having to operate one by one. By connecting each equipment to one central control unit (CCU:Central Control Unit), collective control of equipment or individual control of each equipment is implemented in a control tower such as a control room, building, school, etc., by visiting each room where the equipment is installed and manually The inconvenience of control has been improved. The central controller applies an automatic operation function according to the pollution degree of air quality (fine dust, CO2) in each room where the equipment is installed, and a wireless central control system using a wireless communication module has been implemented and is being applied to schools.

In addition to heat recovery ventilators, we are launching new products such as cold and warm air purifying dehumidification systems, built-in dressing room dehumidifiers, and ceiling-mounted dehumidifiers, and we plan to launch various new products through continuous technological development.