FESCOL as sole partnership with EnerTech (Canada) Energy Technology in China has recently signed a contract of construction of Lubi® solar wall combining heating and ventilation in a industrial plant with Tianjin Dingfeng Colour Steel Co., Ltd. The high-tech product-solar  heating with ventilation is expected to be mounted in the modernized plant of 8000m2. At present Lubi® is a solar application product with the highest COP, as its principle is outdoor cold air is directly heated by solar power. Temperature of cold air through solar wall is normally raised 20-45℃ higher than ambient temperature. Applications are widely in ventilation pre-heating of air conditioning system, improving the operating condition of air source conditioning in winter and drying process of agriculture and industry. Average pay-back period is 3-5 years.