Workspace heater for FDM 3D printer for my diploma thesis

Due to my diploma thesis at Czech Technical University in Prague about FDM 3D printing I develop my own FDM 3D printer and need improve workspace heating. Until now there are 3x1kW halogen reflector as heater > without air circulation and it's not good enough. The printing parts are twister due to delamination (What is delamination?). I am going to change the reflectors for better solution > 2x blower heater (TME eshop link). I hope this should help enough.