I picked up one of those, what I think was an option, heater diverter for our Series V heater (mounted below the diverter door and had a front & back plate with an angled piece that directed the air flow down towards the floor as opposed to a more random pattern). Put it in last weekend, took the car out tonight, it was cold, to see if it helped with he heating issue and it worked absolutely great. It directed the heat where it needed to go ----- toasty feet & legs for me the wife and the doggie . Simple option/fix that I recommend to all