a said heating unit 33 a is to condition air in terms of temperature to more desired levels to supplement other means of indoor heating since air near ceilings has relatively higher temperature than air near floors the efficiency of heating unit 33 a would be higher the secondary fan 31 with a self locking universal joint 32 can also be used to manage the direction of the air flow delivered by fan 10 to cover areas where fan 10 can not generate strong enough air circulation alone fig8 also demonstrates possible combinations of different air quality and quantity improvement devices in a desired order in sandwich construction using a universal connector and its female and male universal connectors fig9 shows detailed description of portable fan 34 comprising a power source 35 and a motor 36 and blades 37 connected to said motor 36 that is powered by power source 35 air quality improvement devices such as an electrostatic filter 38 and a heating unit 40 are attached to said fan 34 using a universal connector such as 39 which includes female and male connectors 39 a and 39 b respectively heating unit 40 consist of heating element 41 which is powered by same electric power source 35 which powers fan motor 36 universal connector 39 includes female and male connectors.