... Warranty 4-) CE/ISO Certificated AC,BC F.R.L air treatment units are same style as AIRTAC. It ... selected. ORDER EXAMPLE ORDER EXAMPLE: * Small size, F+R+L three units, port size 1/4", manul drain type, model ... no. is AC2000 * Middle size, F+R+L three units, port size 1/4", auto drain type, model ... no. is BC2000D * Small size, F.R.+L two units, port size 1/4", auto drain type, ...