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With the recent trend toward highly airtight and insulated houses, ventilation also needs to be energy efficient and eco-friendly. The product developed by K'MAC is a heat-exchange ventilation system named "Ondaless". It is a practical product to reduce heating/cooling losses and to save electricity by keeping the heat from the cooling of the room in summer and the heating of the room in winter out of the room without letting it escape.

K'MAC Co., Ltd.　https://www.m-osaka.com/en/exhibitors/1082/

(Left) Heat exchange ventilation system without air ducts
(Right) Wireless remote control to automatically switch to full mode when CO2 concentration becomes high

　
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