Duct Cleaning and Indoor Air Quality Experts

Air Handler Cleaning & Refurbishment




Depending on the scope of the repair and project requirements, HVAC equipment may be refurbished for less than 50 percent of the cost of new equipment 

Evaluating the cost of replacement vs. refurbishment when it comes to HVAC equipment is a tough decision, but one that every facilities professional will probably face. So how do you know when refurbishment is a viable option?

If  it seems that the refurbishment will offer at least 10+ years of reliable serv­ice, it’s probably worth the work and money. Some equipment is robustly constructed and can easily go beyond its statistical useful life with refurbishment.

A straightforward device (like a central  air-handling unit) can be cleaned up, leak tested, receive a replacement fan shaft, bearings, control valves, and damper actuators; and be vi­able for many years.

Large built in place air handling units often have the building constructed around them when new, removal and replacement of these units is very costly and invasive.

Units with dirty coils, leaking drain pans, worn or mold contaminated fiberglass liners, rusty and corroded metals can often times be refurbished for about %25 of the original cost or less.

This applies to large built up units 10 – 100 ton, smaller packaged units may not be worth refurbishing due to small size and access to internals and complexity.

The  pictures are from a project started last weekend, four 80 ton air handlers had mold, fungus and worn fiberglass liner inside them.

RCS was employed to inspect the buildings 26 year old HVAC system, air handlers, VAV boxes, supply air ducts, return air plenums for signs of visible mold. A 3rd party took air samples from all 6 floors of the building. It was determined the building tested clean and the problem was localized to the air handlers.

RCS Drafted a custom scope of work and timeline for this project, presenting options to the facility managers, closed cell foam was specked to replace the fiberglass liner but, due to cost issues, fiberglass liner was re installed.












First step was removing (scrape) the old worn liner from inside the fan compartment, then vacuuming and treating the compartment.

We cleaned and treated the fresh air intake compartment, return air plenums in the penthouse on the roof, coils, coil compartment, drain pans, fan compartment, fan housing, fan, supply air plenum and the supply air ducts inside penthouse.

Some facilities request re finishing of the fan, fan housing and metal supports inside the units, for this we use an industrial epoxy.

Once everything was cleaned we installed new mechanical fasteners followed with fiberglass liner, mastic and new foam seals for the doors.

Each air handler will be completed in one weekend shift.


  • Air-handling unit refurbishment typically costs about 25 percent of the installed cost of a new unit.
  • Leaking drain pans can be epoxy coated to provide a smooth corrosion resistant finish that stops leaks.
  • Intact duct liner can be coated with a repair coating to resurface the liner.
  • Removal and replacement of internal liner can be performed in large duct work.


RCS provides HVAC cleaning and restoration services for missouri and southern illinois. 20+ years of experience means that we can provide you with a solution to your cleaning needs.

NADCA Trained and Certified.

We specialize in:

  • HVAC Mold/Fungus/Microbial Remediation.
  • HVAC Smoke/Soot/Odor Removal.
  • Cleaning & Refurbishment of Air Handling Systems.
  • Duct Cleaning , Hazmat Duct Cleaning.
  • Insurance Work Specialists.
  • Ventilation Cleaning Consulting

All Pictures and Text © RCS Ventilation Cleaning

Contact Us




RCS Cleans Lebanon Illinois University Ducts

rcsstl.com , RCS cleans ventilation systems for schools, universities, hospitals,food processing facilities,industrial, commercial and residential. We are also insurance restoration specialists, performing HVAC smoke and microbial remediation services.

Call us to solve your HVAC cleaning problems.

RCS Cleans and Restores HVAC Systems After Fire in Commercial Buildings

RCS air duct cleaning’s powerful vacuum truck


RCS Air Duct Cleaning was called into action to clean and restore the HVAC systems in a commercial park of attached buildings. The fire at 137 Chesterfield Industrial Boulevard was bad and affected the other business attached to the complex.



RCS technicians in action.



The Natoli company manufacturing area needed to be restored the fastest , RCS had 5 days to clean and deodorize the 6 large roof top units and connected duct work, the 3 demisters for the cnc machines and 2 small  air filtration systems.




office air duct cleaning

Restoration of HVAC systems after smoke damage.




RCS then turned our focus to the front offices and the remaining buildings , some of the furnaces and duct work  where impacted by severe fire and smoke damage, these units where recommended for replacement. The remaining furnaces and duct systems where cleaned and deodorized.






Cleaning smoke impacted HVAC systems goes a long way to stop the smoke odor and particulate inside the buildings.

RCS is insurance restoration experts, we are not your typical duct cleaning contractor. HVAC systems cleaning is ALL we do.



RCS Restores HVAC System in Church After Fire

Air handling units “dug” into basement floor.

RCS vacuum truck
RCS Air Duct Cleaning www.rcsstl.com  powerful vacuum truck used to extract debris from duct systems. RCS was called to the SS Peter & Paul Catholic Church in Waterloo Illinois after a small fire. Its important to clean, deodorize and restore HVAC systems after fires and smoke damage to eliminate particulate and odors.