North Tech Group’s products is meeting and exceeding quality standard of North American NAFS, NFRC, CSA, European CE. They were tested and certified by NAMI, IGMC,QAI. North Tech team are consistently strive to provide the finest, most energy saving, hurricane resistant products architecturally. With our Energy Star awarded windows and doors, customers not only get pleasant green buildings, but also get allowance from the government up to 8000USD.