officeHVAC Systems in an office building account for upto 60% of electricity consumption. Major cost borne by the Corporate World.

Sources of Indoor Air Pollution / Pollutants in Hospitals

Volatile Organic Compound (VOC)
In Indoor Environment Toxic Gases are emitted from wide variety of sources:
» Building Materials,
» Cleaners, Plastics,
» Wood Products,
» Paints, Carpets,
» Polishers,
» Deodorants, etc.

Volatile Organic Compound (VOC)

It adversely affect to:
Allergy, Asthma, Eye & Nasal irritation, Affect respiratory tracts, etc.
Carbon – di – oxide – Co2
In an indoor environment human being Exhale Carbon dioxide it cannot be reduced or oxidized.
It is not a toxic or carcinogen but a high level of CO2, causes:
» Headaches, Restlessness,
» Difficulty Breathing, Sweating,
» Tiredness, Increased Heart Rate,
» Elevated Blood Pressure, etc

Odour is a major Irritants & it is cause from various sources:

» Food Odour
» Body Odour
» Mold, Fungi & Microbes
» Cleaning Chemical Odour, etc
This is a residual odor & difficult to dilute from conventional method.
These are collectively known as”SICK BUILDING SYNDROME”

To address Sick Building Syndrome (SBS) the AHU systems take “Outdoor Air” to dilute Volatile Organic Compound (VOC) and reduce Carbon dioxide (CO2) within acceptable limits. Conventionally Fresh Air is used to improve Indoor Air Quality (IAQ)

» Fresh air is not cheap!
» Hot and humid air needs to be cooled down to room temperature.

Hidden Cost of Fresh Air taken by Air Handling Unit in an HVAC System:

Load profile of fresh air
» 60% to cool moisture … wasted energy
» 28% to cool nitrogen …..wasted energy
» 12% to cool oxygen …..the only useful component in fresh air.
“Energy Consumption- 150 CFM of Fresh Air will require 1ton of cooling load. (Approximately)”