*(all) set. (to do something) prepared or ready to do something. (*Typically: be ~; get ~.) Are you set to cook the steaks? Yes, the fire is ready, and I'm all set to start.
How long will the odor last from our newly installed cellulose insulation? The odor is kinda of like a mild ammonia smell and is only noticeable when we're running the a/c.
The smell of raw sewage coming from an AC vent is never a good sign. It usually indicates a backed up sewer line or ruptured sewer vent pipe somewhere near the ductwork. All it takes is a bit of methane from the backup to fill your house with the nasty smell.