HO CHI MINH CITY, March 25 (Xinhua) -- The 2019 international exhibition on heating, ventilation, air-conditioning, air filtration and purification, and refrigeration systems kicked off here on Monday with the participation of more than 250 companies around the world.

　　Companies from countries such as China, Japan, Germany, Singapore, Turkey and the United States are showcasing their latest products, technologies and services in the fields of heating, ventilation, air-conditioning, air filtration and purification, and refrigeration at the three-day expo.

　　Relevant symposiums on the fields in Vietnam and in the world will also be held during the exhibition. Vietnam's air-conditioning has been forecast to grow over 14.6 percent from now to 2021 annually, local experts said on Monday.