Checked my gas furnace filter and found it to be totally black. This condition occurred a few months earlier this year. The filter is changed monthly,so there were two filter changes that appeared normal. Is my flue loading? The furnace is 8yrs. Old.

Good evening Please can someone help and advise me please.. I have just had a new kitchen and bathroom a full new central heating put in which the boiler is now in place in the kitchen rather than in the bedroom.. since having this fitted we have thin black soot all over the house especially my...

I sit directly under a air vent in my office building which is an older 8 story building. Every year when the air conditioner get going my desk gets sprayed with small black flakes. They are very small and hard but can be easily crushed into a power. I would guess its some type of carbon build...

My daughter moved in to a fairly new apartment with heat & air that comes from an electrical unit at the front of the apartment. The unit is similar to something you would see in a hotel room. There is black soot that is on her things. When you rub your finger through it it smears. Does anyone...