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Fan Refurbishment (Supply Air Fan)

Background

There were issues of paint flakes and rust particles becoming airborne in the supply air system. The contamination was found to be coming from the supply air fan located post filtration. The internals of the supply air fan shroud and fan blades were found to have severe levels of surface corrosion. Surface corrosions was also evident on the shroud inlet spigots with light levels of corrosion on the external surfaces of the supply air fan.

 

 

 


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Building Overview

The building is a multiple level establishment which operates predominately around normal working hours. The building is sealed and is solely reliant on the air conditioning system for air distribution within the occupied space.


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The Scope

In order to significantly increase the life expectancy of the supply air fan the following items were undertaken;

  • Implement Engineering Controls to manage dust/odours during descaling and painting works.
  • Descaling of Supply Air Fan Shrouds Internal and External
  • Descaling of Supply Air Fan Blades
  • Painting of Supply Air Fan Shrouds (internal and external) and Fan Blades

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Project Summary

The scope was completed at night due to building operations, it was imperative that all works be undertaken after hours with any painting works conducted before the commencement of the weekend to allow for the paint to set to reduce the odour.


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Project Overview

The rust and old paint was rubbed back and prepared in order to apply the new paint. There were a number of engineering controls implemented in order to prevent cross contamination from dust/rust and odour from the paint. The refurbishment of the supply air fan has eliminated the risk of contamination from the fan entering the supply air stream and added years to the fans operational life cycle.

This project was directly supervised by a NADCA Air System Cleaning Specialist


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Supply Air Fan Shroud – Before

Supply Air Fan Shroud – Before

Supply Air Fan Shroud – After

Supply Air Fan Shroud – After

Supply Air Fan Shroud – Before

Supply Air Fan Shroud – Before

Supply Air Fan Shroud – After

Supply Air Fan Shroud – After

Supply Air Fan Blades – Before

Supply Air Fan Blades – Before

Supply Air Fan Blades  – After

Supply Air Fan Blades – After