|
No pen marks or anything like that. I believe it started when we first started using the furnace. As for certain areas being dark, the register are really cheap metal. The grates have even bent some from walking over them, I believe the darker areas are from where the register is most snug against the floor. None of them fit perfectly, they each have an edge or something that's not entirely flush against the floor. Shotty production and materials is what I blame for that problem.
|