HVAC and duct cleaning after a downtown fire

A fan coil has a fan, a coil, a drain pan and short ducts to nearby grilles. After a fire, all of them hold residue. Cleaning means removing panels, cleaning the fan, coil and pan, cleaning the short runs and fitting a new filter. Many buildings require their engineers to be involved.

Exposed ducts in lofts are cleaned inside under negative pressure and wiped outside. Long runs may need access points opened.

Corridor ventilation and exhaust risers belong to the building. If odor appears when a neighbor's fan runs, report it to management.

South Loop townhomes usually have their own furnaces and ducts. Cleaning covers returns, supply runs, blower and coil.

Negative pressure with HEPA collection, brushes in each run, blower and coil cleaning, and replacement of contaminated flex duct. EPA suggests providers who follow NADCA standards ^[1][3].

After the heavy room cleaning, so returns do not pull new residue in.

Include the system in the scope your adjuster reviews ^[4].

Check the new filter after two weeks.

In most downtown condos, the fan coil or heat pump serving one unit belongs to that owner, while risers, corridor air handlers and water loops belong to the association. After a fire, each side cleans and repairs its own equipment, and the building engineer usually needs to be present when unit equipment that connects to building loops is opened.

Converted office and industrial buildings may have ductwork adapted from commercial systems, sometimes serving several units. Smoke in a shared duct affects everyone on it. Ask management how ventilation is arranged; shared ducts are the building's to clean.

Ask for before-and-after photos from inside the fan coil or ducts. Run the system with a new filter, and check it after two weeks. If odor returns, call the contractor back promptly.

Some newer towers use water-source heat pumps in each unit, connected to a building water loop. Cleaning the unit's fan, coil and filter is like cleaning a fan coil, but the building's engineers usually need to isolate the unit from the water loop first. Arrange that through management before the contractor arrives.

In South Loop townhomes, a furnace burner that misfires can push soot through every duct. The furnace is repaired first, then the ducts and rooms are cleaned.

Ask whether the company has cleaned systems after fires, whether they clean the fan and coil as well as the ducts, whether they keep negative pressure throughout and whether they carry the insurance the building requires. Ask for before-and-after photos.

Have a qualified technician check equipment before it runs again. In townhomes with gas furnaces, if you smell gas, leave and call 911 and Peoples Gas from outside.

The fan coil or ducts are cleaned after heavy cleaning of the unit and corridor, so returns do not pull in new residue. Grilles are then sealed until finish work is done. Ask the contractor to schedule this with the building engineer's availability.

Photograph a blackened filter and stained grilles, and make sure your adjuster's scope includes the unit's heating and cooling equipment. Illinois guidance advises the adjuster's agreement before contracting for repairs ^[4].

Fan coil and heat pump filters are small and load quickly after a fire. Replace the filter after cleaning, check it again after two weeks and change it more often than usual for the first season. A filter that grays quickly suggests residue remains somewhere in the system.

Ask for before-and-after photos of the fan wheel, coil and drain pan. They show your insurer the work was done and help you judge it.