... groove structure, aluminum-alloy frame, anti-flame and heat-insulation, galvanized steel roof panelBasement:galvanized steel plate and quadrate ... 7.5Kw centrifugal fan, air capacity is 25000m³/hPurification System Primary filter at air inlet, high-efficiency filter ... cotton), extract filterHeating SystemBurner:Italian RIELLO brand diesel oil burner, model: RG5S, maximum heat productivity is 260 ...