Glossary of HVAC & kitchen exhaust terms
Australian Standard AS 1851-2012
Australian Standard AS 1851.2012 outlines a set of requirements for the cleaning of commercial kitchen exhausts, filters, and canopies, including: – Monthly inspections of grease filters,– Monthly cleaning of grease filters as required,– Monthly inspection of grease gutters,– Annual cleaning of exhaust hood and exhaust plenum.
Biofilm
A Biofilm is a collection of bacteria and microorganisms that have formed a sticky layer and bonded to a solid surface within the HVAC system. Biofilm will often form on the HVAC coils within the AHU. It is, therefore, important that the coils are routinely tested for Biofilm and remedial work completed if it is […]
Biological contamination
Biological contamination is a general term which refers to any one of the following: Note that bacteria, viruses and fungi all have different ways of existing and reproducing and, therefore, require different cleaning methods.cleaning practices
Fungal contamination
The most common form of fungal contamination in an HVAC system is mould. However, yeast is often found within an HVAC system and will require remedial work. Fungi tend to grow in colonies and are often green or black. The fungus will require nutrients and moisture to survive and thrive. Fungal contamination produces spores which […]
Heating & cooling coils
Heating and cooling coils are central to the HVAC system’s workings and play a direct role in cooling the air while in Air Conditioning mode and heating the air while in Heating mode.
Aus Standard AS 3666.2-2011
Australian Standard AS 3666.2-2011 outlines a minimum set of requirements for the cleaning of building HVAC systems, including:
HVAC Plenum
A plenum is a box that connects the ductwork to the AHU (air handling unit). An HVAC system typically has two plenums: a supply plenum and a return plenum. The supply plenum takes the hot/cold air from the AHU and distributes it through the building via the ductwork. The return plenum takes the room air […]
Air Handling Unit (AHU)
The Air Handling Unit (AHU) is the engine room of an HVAC system and is responsible for cooling the air when in Air Conditioning mode or heating the air when in Heating mode. The AHU is made up of many components including: