Green HVAC for commercia buildings/warehouses/multi level residentials

摘要

A green HVAC system for single or multi level commercial or residential buildings including:;a building having a lower elevation and higher elevation.(i) The lower elevation blower that can blow air to higher elevation or outside of building ,or can suck air from higher elevation or outside of building(ii) The higher elevation blower that can blow air to lower elevation or outside of building, or can suck air from lower elevation or outside of building