Our personnel are always inside the spirit of "continuous improvement and excellence", and together with the outstanding excellent goods, favorable price and good after-sales services, we try to gain every customer's trust for HVAC AHUs, fresh air recuperative ventilation , air condition , Counterflow Heat Exchanger ,villa fresh air ventilation sytem . All prices depend upon the quantity of your respective order; the extra you purchase, the extra economical the rate is. We also offer fantastic OEM provider to numerous famous brands. The product will supply to all over the world, such as Europe, America, Australia,Vancouver , Malaysia ,Johor , Thailand .Our company has already have pass the ISO standard and we're fully respect our customer 's patents and copyrights. If the customer provides their own designs, We will guarantee that they will likely be the only one can have that merchandise. We hoping that with our good products can bring our customers a great fortune.