HVAC

Heating, ventilation and air conditioning (HVAC), is a general term for indoor environmental comfort which creates indoor air quality by controlling air change per hour, cubic feet per minute (CFM), temperature and humidity. The goal of HVAC is to provide thermal comfort and acceptable indoor air quality.

HVAC systems can be used in both domestic and commercial environments. They are important components of both residential structures as well as cleanroom environments where safe and healthy building conditions are regulated with respect to temperature and humidity, using fresh air from outdoors.

Total Clean Air is a global leader in the design, installation, commissioning and qualification of cleanroom HVAC systems.

We will develop a custom and compliant system to help maintain each cleanroom’s clean environment by allowing the appropriate volume of clean air into each room at the precise temperature and humidity required. We can manufacture and supply a wide array of air handling systems for your HVAC applications.

Our HVAC services are ISO 16813:2006 accredited. We take into consideration the need to deliver a secure environment for cleanroom activities as well as the need to provide a healthy indoor environment for personnel working in the cleanroom environment.

Modular Cleanroom Benefits

Modular Construction
Quick Assembly Time
Versatility
Reconfiguration
Airflow Control
Inexpensive Modifications

Understanding HVAC

The three major functions of HVAC are interrelated. HVAC systems can provide ventilation and maintain pressure relationships between spaces. Air cleaning and filtration remove particles, contaminants, vapours and gases from the air, and the filtered and cleaned air is used in heating, ventilation and air conditioning.

Ventilation is one of the most important factors for maintaining acceptable indoor air quality in buildings. It involves exchanging or replacing air in order to provide high indoor air quality. It removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air.

Cleanroom Design, Build & Validation

Budgeting and planning
Engineering, design & layout
Airflow and filtration design
Construction and Installation
Full Certification of our product
Industry-specific equipment installation
Validation

HVAC in Cleanrooms

When it comes to cleanrooms, HVAC is less about comfort and more about necessity. The design of HVAC systems in cleanrooms is different from the design for commercial buildings. HVAC controls the temperature and humidity of your cleanroom to appropriate levels of precision. Cleanroom HVAC designs involve:

Knowledge of regulations
Cleanliness level guidelines
Airflow
Room pressurisation
Temperature control
Humidity control
Accounting of activities taking place inside

Some of the ways in which cleanroom HVACs are different from conventional systems are:

Increased air supply
Airflow patterns
Use of high efficiency filters
Room pressurisation

An increased air supply brings more air changes per hour with new HEPA filtered air circulating into the cleanroom many times an hour. Conventional air-conditioning systems require about 4 to 8 air changes per hour while a cleanroom could require anything between 20 – 90 air changes per hour. This air change rate method of calculation is used in cleanrooms with lower cleanliness requirements (usually ISO 6 to 9), with the air change rate largely based on the level of particles generated by people and processes.

Modular Cleanroom Services

Cleanrooms with higher air change rate requirements use more energy. Because of this, an additional control capability will be provided which allows the system to reduce the airflow using a variable speed drive to reduce rates when the occupancy rate is low or the room is not in use.

Designers often calculate airflow rates using the face velocity method when designing cleanrooms of a more stringent classification (ISO 1 to 5). Traditionally, designers use an air velocity of 0.5 m/s as the standard for a cleanroom design. However, recent studies have shown that velocities as low as 0.35m/s are able to maintain the correct particle count within a room, although this is dependent on the level of particles generated by people and processes.

Cleanroom Features

Total Clean Air for the Installation and Commission of Your HVAC Cleanroom Systems

At Total Clean Air, we employ innovative methods and pride ourselves on constructing and installing state-of-the-art HVAC cleanroom systems for all cleanroom facilities regardless of their size and shape. Our services are ISO 14001, ISO 9001 and OHSAS 18001 accredited.

At your request, our experienced CTCB certified engineers and ISO classified controlled environments can be provided to your facility to protect. critical processes and add value to your operations. We deliver on time and at competitive prices.