Being supported by an highly developed and skilled IT group, we could offer you technical support on pre-sales & after-sales support for air to air heat recovery core, HVAC air handling units , residential HVAC system , liquid circulation recuperator ,air handling . It can be our wonderful honor to meet your requires.We sincerely hope we can cooperate along with you inside the around long term. The product will supply to all over the world, such as Europe, America, Australia,Comoros , Azerbaijan ,Qatar , Slovakia .Our Company has qualified engineers and technical staff to answer your questions about maintenance problems, some common failure. Our product quality assurance, price concessions, any questions about the items, Be sure to feel free to contact us.