In modern buildings, indoor air quality is an important parameter. However the common premise that outdoor air is 'clean' cannot be farther from truth. Because outdoor air quality varies due to proximity of other buildings, local pollution sources like traffic or industries etc. Similarly building exhaust re-entrainment too is a common occurance.

Thus design and location of building intake and exhaust and selection of appropriate louvers assume critical importance.

Degradation of electrical control equipment by corrosive gases is a well-known effect. In fact, virtually all manufacturers of sensitive electronic/electrical equipment specify the required environmental conditions for their equipment as part of the warranty conditions. These specifications set limits for temperature, relative humidity and chemical contaminants as they all influence the rate of corrosion.

Installation of air filters or treatment systems by themsleves do not have the capability to take care of the certain aspects.

The architecture and inspired interiors of modern working spaces demand air distribution products which combine maximum engineering performance with impeccable aesthetics. The performance parameters include higher airflows at lower noise levels with ease of installation built in.

So the solution does not lie in fabricated air distribution products but engineered solutions that also call for careful selection.

Most infections (including COVID19), are transmitted either by direct contact (surface to surface) or by droplet emission caused by coughing, sneezing or even normal breathing and talking. Direct contact transmission can be controlled by good hygiene practices, social distancing,disinfecting surfaces and use of PPEs as suggested by WHO & ICMR.

However, it is the microbes expelled through droplets that pose a challenge in any closed or indoor environment. This paper outlines how to overcome this challenge.

Dampers in the HVAC system are designed to perform various functions such as volume control, directional airflow, shutoff and isolation in case of eventualities. Severe operating environments warrant special materials and construction, higher leakage ratings and better operational capabilities.

Since the operating environments vary from critical to severe, less than optimum containment or sub par function can have drastic implications.

Ambient air quality outside in most cities is now degraded to harmful levels. Indoor air has always been found to be more toxic than outdoor, due to occupancy, building materials, stored goods, activities in the buildings etc. The problem is further compounded by inadequate ventilation.

Commonly promoted solution of installing air purifiers or treatment systems fail to address the issues like Infiltration & Exfiltration, Optimised Room Air Movement and Demand control Ventilation.