HVAC and duct cleaning after a Near North fire

Tower units have fan coils or heat pumps whose fan, coil and pan hold residue. Cleaning usually needs the building engineer to isolate the unit first.

Exposed ducts are cleaned inside under negative pressure and wiped outside.

Mansions and row houses often have basement furnaces with long duct runs. Cleaning covers returns, supply runs, blower and coil.

Corridor air and exhaust risers belong to the building; report odor to management.

Negative pressure, HEPA collection, brushes, blower and coil cleaning, flex duct replacement. EPA suggests NADCA-standard providers ^[1][3].

Make sure your adjuster's scope lists the air system ^[4].

Near North towers do not all handle air the same way. Newer buildings along the river and in River North often have individual HVAC units, which can be cleaned one unit at a time. Other towers use risers, shared exhaust shafts and corridor air supplied by building equipment. Smoke can move through those paths to units well away from the fire. A contractor should find out from building engineers what serves your unit before opening anything, because shared parts belong to the association and cannot be cleaned as part of one owner's job.

Turn your system off as soon as you can after a fire, and keep it off until someone checks it. Running it spreads residue through clean rooms. If the building controls it, tell management about the fire damage in your unit and ask what they recommend.

Converted lofts often have exposed metal ducts running under timber ceilings. They look simple, but soot settles on the outside as well as inside, and the long open runs mean a lot of surface area. Exposed ducts also make it easier to see what has been cleaned, so ask the crew to show you. Lined duct is harder: fibrous lining that has absorbed smoke may not clean well and may need to be replaced.

Older mansions, walk-ups and row houses may have had ductwork added long after they were built, threaded through chases and old chimney spaces. Some have radiators and no ducts at all, or have separate cooling units on upper floors. Access can be tight, and cutting into plaster to reach a run should be done only with care. In homes built before modern rules, old insulation around ducts or pipes may contain asbestos, so ask for testing before anyone disturbs it.

A real post-fire job goes beyond a vacuum at the registers. It should include an inspection of the air handler, coil, blower, drain pan, supply and return ducts, registers and filter housing. The system is usually cleaned under negative pressure, so dislodged residue is pulled into the collection unit rather than into your rooms. The coil matters, because residue there can keep producing odor. New filters go in at the end, and it is sensible to change them again after a short time, since remaining fine residue can collect there.

Timing matters as well. Cleaning ducts while the rooms are still dirty can recontaminate them, so this work is usually coordinated with smoke damage cleanup and odor removal. Ask for before and after photos from inside the ducts. They are useful for you and for your insurer.

If a kitchen fire happened in a restaurant below your home, greasy residue may have reached your system through chases or shafts. That film holds odor and needs a suitable degreasing method. Mention the source to the crew. Otherwise, the system may be cleaned for soot alone and the smell may come back when the heat turns on. Keep notes about what you smell and when, as this helps the crew find the path.

Being told to keep the system off is hard in a Chicago January or a humid July. Ask how long it will be off, and whether temporary heating or cooling is safe and allowed in your building. Do not use fuel-burning heaters indoors. In winter, keep enough heat to protect pipes, and let management know if the unit will be cold.

Exhaust from a bathroom or kitchen in a tower may run into a shared shaft. After a fire on another floor, residue can reach your unit through that path, especially if a damper has failed or was never fitted. A simple check of each grille can reveal soot. Clean the grille and report what you find to management. Dryer vents deserve a look as well, since lint and soot together can create a fire hazard of their own.

Keep a short record of what was cleaned in the unit and what belongs to the building. If a smell returns later, that record shows whether the source is likely to be inside your walls or somewhere shared, and it saves time when you speak with management and your insurer.

Ask what equipment will be used, whether the coil and blower are included, how access holes are sealed and whether photos are provided. Ask how they will protect floors and corridors in a managed building. A clear answer before work starts prevents gaps later.

Also ask who will reseal any panels they open, and whether the building engineer needs to be present. In older houses, ask how they will reach runs hidden behind plaster without cutting more than the job truly requires.