Wayne’s Service Tips – The Service Call – Part 2

The Service Call – Part 2
Four Quick & Easy Steps to Properly Clean an HVAC System
Negative Air Cleaning

Once you have completed the pre-inspection report and done a walk through of the home you are now ready to start the duct cleaning process.  Be sure your customer has signed your service order prior to starting the job.

The following sequence of steps assumes you are doing the job alone.  If you have a helper you’ll simply split the tasks.

 

STEP 1 – Clean the Furnace/Air Handler

  • Vacuum the interior surfaces of the Furnace/Air Handler.
  • Clean the Evaporator Coils by vacuuming and using Coil Brite (a chemical cleaner for coils).
  • Vacuum  and clean the Blower Assembly.
  • Wipe down the exterior cabinet of the Furnace/Air Handler.
  • Using a fogger and/or pistol sprayer fog the interior surfaces of the unit and the evaporator coil with a biocide.
  • It is also advisable to pour a little biocide directly into the coil drip pan.

 

STEP 2 – Clean the Supply & Return Registers and Grills

  • Prior to beginning work inside the home it is important that you protect your customers furnishings and floors.
  • There are several types of coverings that can be used which include plastic, canvas, poly tarps, cloth products, etc.  We find the easiest and most cost efficient are twin size bed sheets.  You can purchase them or check with local laundry services; they will provide the sheets and clean them for you on a regular basis.
  • Lay out a drop cloth under each vent and on any furnishings in direct vicinity of the vent.
  • Remove wall, ceiling, & floor registers.
  • Pre-vacuum each register opening using a HEPA filtered backpack vacuum.
  • Plug register openings with foam register plugs.
  • Block the return by placing the filter in a plastic bag and re-installing it in the furnace/air handler or ceiling grill.
  • In homes with multiple returns and no filter in the return grill, simply use foam register plugs.
  • Clean each grill and/or register with Dynamite cleaner.

 

STEP 3 – Clean the Supply and Return Ducts

  • Connect the TurboJet negative air machine to the supply air system.  If you have floor ducts you can connect to a floor vent, a trunk line, or the plenum box using a 12” adapter collar.  If you have ceiling or wall vents connecting with the Pogo Pole Hose Adapter is the best option.
  • Clean each vent individually using the Cobra Power Brush System, Forward/Reverse Air Whisk, or the Sidewinder Duct Hose Assembly.
    • The Cobra Power Brush System incorporates the use of a motorized power box and a cabled brush assembly.  This system will aggressively remove debris from the walls of the ducting and is especially useful when you have layers of caked on debris.
    • The Sidewinder Duct Hose Assembly is our most versatile cleaning tool for all duct types and sizes.  When connected to a 2 stage compressor capable of 175 PSI at 14-25 CFM’s it will propel itself through the duct system effectively dislodging debris and air scrubbing the interior surface of the duct system.
    • The Forward/Reverse Air Whisk System is designed to operate with a smaller 2 HP – 125 PSI – 6CFM compressor.   It has a stiffer hose and is not self propelled, but relies on the operator to push and pull it through a duct system.
    • It is important that you only fog chemicals into each duct line individually and only after the whole system is thoroughly cleaned.  Fogging prior to cleaning all of the ducting may cause chemicals to coat un-cleaned ducting and make it difficult to clean.
  • After thoroughly cleaning each line treat each opening by fogging a biocide, Soot Set Sealant and Odor Kill Deodorizer.
  • Connect the TurboJet to the return duct system and repeat the above steps.

 

STEP 4 – Install Grills & Registers, Other Products & Final Clean-up

  • Remove the plastic bag from the filter in the return.
  • Remove the foam register plugs and install the cleaned registers in each supply duct.
  • Install any add on accessories you have sold customer.
    • Electrostatic Air Filter
    • Ultra Odor Kill Solid
    • Carbon odor control pads
  • Remove all your equipment, tools, drop cloths, cords & hoses.
  • Using your backpack vacuum thoroughly clean-up all the areas of the home you have worked in.  Your policy should be to leave the home as clean or cleaner than you found it when you arrived.
  • Complete the post clean up inspection report with the homeowner.

Download Service Checklist [pdf]

Download Duct Cleaning Reference Guide [pdf]

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