I solder in an ex laundry. The surrounding area and bench are
covered in galvanized metal sheet I bought and cut to size.
The soldering bench is next to the sink great for quenching burns
I have an exhaust fan mounted above the bench.
Also the fire extinguisher is on the door frame so in a disaster I
can get it on the way out of the room.
I assume the water heater and furnace are gas. Ask the local fire
brigade, and tell them you give discounts to emergency services/first
forgot to mention I sit down to solder.