Howcool constructed a large, cool warehouse for Da Tian logistics. The warehouse required 25 degrees and 20 degrees sections and the sizes are respectively 45 * 43 * 6 m and 19.8 * 13.6 * 6m. The project was sprayed with polyurethane material to maintain insulation effects. It also employed Bitzer2 parallel compressor units, and the cooling fan utilizes a lengthening ventilator.