在F40系列的空气处理单元有一个无框结构。Airbox F40是S40系列的低成本替代品,体积小,单位尺寸为13Q(外观尺寸为1340 x 1340 mm)。所有面板在F40系列是双层皮,与内板,外板和绝缘之间。侧板和顶板的绝缘厚度为40mm。平板设备的底部面板也安装了40毫米厚的绝缘材料。在所有其他型号中,底板的绝缘厚度为60mm。该设备的内部是完全光滑的。在标准型,镀锌钢板厚度为1.0毫米,用于面板。或者,在额外的成本,可以选择钢板镀锌与塑料涂层,不锈钢V2A(1.4301)或铝AlMg3分别用于外部和内部。塑料涂层的标准颜色为浅灰色RAL 7035。 Other RAL colours are also possible. The rock wool, used as thermal and acoustic insulation, is non-flammable and is partly glued onto the double-skin panel. The F40 units are Eurovent certified and suitable for meeting the hygiene regulations of VDI 6022. Base frame F40 air handling units can be fitted with a folded base frame with heights from 100 mm to 500 mm, made from 3 mm thick galvanised steel sheet.