TAIWAN DEI Temp. Control Technology CO.,LTD. is one of the few companies that is with professional skills and quality management in the developing , manufacturing , sales and service of digital temperature controllers & systems in Asia.

Accompanied by the foundation of Processing & Manufacturing Department, the company was renamed
as “Taiwan DEI Temp. Technology Ltd.”and also double increased the capital with 6 members.

Reformed the company into the shares- holding LTD with capital 17 million and published 1.7 million stocks. There were 21 employees at that time.
New plant was set up with the land area of 1693 square meter and 991 square meter for factory. There were Sales Department , Administration Department, Factory Affairs Department and R&D depatment.Since then fully concentrated on the development , manufacturing and sales of digital temperature controllers.

Increased the capital to 27 million and published 2.7 million stocks.
Branches in Taipei and Taichung were founded; also Expanded our product range from A / C controllers to HVAC, Refrigeration and Sea Cultivation Temperature controllers.

Successfully developed digital controllers for AC Inverter type air conditioners; further in January 1999 , TAIWAN DEI was recognized as a ISO-9001 certified company by , Germany.Capital increased to 60 million from 30 million , 6.6 million stocks published and employees increasing to 66 members; Shanghai branch was set up.

New sub-company of D&G Taiwan HVAC Technology and Service Co.,Ltd. was formed which comes originally from the company's Air Conditioning department.
This new sub - company was for the purpose of promoting Inverter techniques commercially into Taiwanese air conditioning market.
Capital increased from 60 million to 1 billion , stocks in 10 million ; Tainan branch was set up which makes now an active service chain from North Taiwan to South by Taipei , Taichung , Tainan and Kaohsiung 4 spot - offices.

DEI Taiwan, the head quarter, continuously move forward with the innovative of Net work Monitoring & Control system and DDC system as well. Meanwhile, this is DEI'S milestone to the stage of High - Tech Monitoring Control system.
D&GTaiwan continuously carry out the application of high technology into the manufacture and marketing of Inverter Air Conditioners into the Taiwanese market.

The R&D team which has full of experience in AC Inverter techniques has successfully developed the household DC Inverter air-conditioner that is the first innovation in Taiwan. This system can drive the compressors of DC 4 pole R-22, DC 4 pole R-410A and DC 6 pole R - 410A. Meanwhile , the R&D team of Refrigeration section has completely developed DEI-950 which is the network monitoring system for integration of Refrigeration, HVAC and Power.

In order to reach the optimum and ideal mass production scale and quality stability, DEI insists that all products completely manufacturing in Taiwan DEI. Shanghai Hong-Yi Trading Ltd. manages the marketing and service in China.