Weather Controlling Solutions India Private Limited
Weather Controlling Solutions India Private Limited
Bhosari, Pune, Maharashtra
GST No. 27AABCW5970D1Z8
08048606890 20% Response Rate
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HVAC Clean Room Service

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Hospital Hvac System
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Hospital Hvac System

Approx. Price: Rs 4.55 Lakh / PieceGet Latest Price

Hospitals are very complex environments that require special HVAC system design, maintenance and repair considerations. HVAC systems in healthcare facilities provide a broad range of services in support of populations who are uniquely vulnerable to an elevated risk of health, fire, and safety hazard. These heavily regulated, high-stakes facilities undergo continuous maintenance, verification, inspection, and recertification; typically, operate 24 hours per day, 7 days per week; and are owner-occupied for long life cycles. HVAC systems are responsible for keeping indoor air quality (IAQ) high and providing a safe temperature for patients and staff alike..

HVAC in Healthcare Facility

Increasing interest has been expressed towards intelligent heating, ventilation and air conditioning (HVAC) systems in hospital environments. Hospitals require efficient heating, ventilation and air conditioning (HVAC) systems to maintain good indoor air quality (IAQ), aseptic conditions, and to secure healthy, safe and suitable indoor thermal conditions (i.e. temperature, humidity, air quality and airflow) for the hospital personnel and the patients.

Hospital ventilation must be effective for controlling airborne transmission and preventing outbreaks of infectious diseases. A correlation exists between ventilation, air movements in buildings and the transmission of infectious diseases. Poorly designed, maintained (i.e. contaminated) and used HVAC systems are common in hospitals and often lead to poor IAQ.

Effect of breakdown of Hospital HVAC System

  • Patient feel uncomfortable

  • Risk of hospital infection spread

  • Surgical procedures delay

  • Emergency situations rerouted to other hospitals

  • Fog in the hallways and operating rooms

  • Damages to supplies which require refrigeration or lower temp

  • Equipment failure

  • Financial loss

HVAC & Infection Control

In a hospital environment, there tend to be high concentrations of harmful micro-organisms. From an infection control perspective, the primary objective of hospital design is to place the patient at no risk for infection while hospitalised. The special technical demands include hygiene, reliability, safety and energy-related issues.
Infections, which may result from activities and procedures taking place within the facility, are a cause for great concern. Three main routes responsible for infections are contact, droplet, and airborne transmission, which are quite affected by room design and construction factors.

An airborne infectious isolation room is constructed to minimise the migration of air from an isolation room to other areas of healthcare facilities. The risk of being infected through the airborne route is a function of particle concentration. The chance of a particle that is carrying an organism falling into an open wound increases with particle concentration. By reducing the concentration, one can reduce the chance of infection and, hence, the number of patients infected.

Recommendations for engineering controls to contain or prevent the spread of airborne contaminants center on general ventilation, air cleaning (primary and secondary filtration), and local exhaust ventilation (source control)

General Ventilation
The most effective means of controlling contaminants, odour and indoor air pollution is through ventilation, which requires simultaneous control of number of conditions:

  • Air change rates

  • Pressure gradient appropriate with class of isolation

  • Appropriate air distribution in the compartments being air conditioned

  • High quality air filtration including absolute filtration

  • Precise temperature and humidity control ensuring maintenance of the intended microclimate

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Temperature And Relative Humidity (rh) Control For Photographic Material
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Temperature And Relative Humidity (rh) Control For Photographic Material

Approx. Price: Rs 10 Lakh / setGet Latest Price

There are a number of environmental factors that affect photographs: temperature, relative humidity, air purity and light are the most important. 

Temperature and relative humidity 

Unsuitable temperature and relative humidity (RH) can cause or accelerate physical and chemical damage. Considerable research has been carried out into the optimum storage environment for photographs. This has resulted in a minimum standard of a physically safe range of parameters of temperature and RH for photographs, based on the physical stability of photographs with a gelatin binder. Within these parameters there are varying degrees of chemical stability. Within the physically safe RH range, photographs will not undergo irreversible physical changes e.g. cracking emulsions and flaking. This humidity range varies according to temperature, as shown in the following diagram. 


© Mark H. McCormick Goodhart / Aardenburg Imaging & Archives 

The darker grey quadrant abcd defines the physically safe range of temperature and RH for photographs. Outside the quadrant, the dotted line shows the glass transition temperature (Tg) of gelatin, which varies according to RH. This is the temperature at which rapid image degradation is likely to occur. The diagonal contour lines (1–500) map relative chemical stability. If a photograph is stored in the environment defined by line 10 it will take 10 years longer to reach the same stage of chemical deterioration as a photograph stored in the environment defined by line 1. Lowering the RH within the quadrant at a fixed temperature will only increase the chemical stability by a factor of 2–3. However, lowering the temperature at a fixed RH can increase the chemical stability by a factor of more than 100. Therefore, the beneficial effect of dropping the temperature within the quadrant, as opposed to the relative humidity, even by a small amount, can clearly be seen. There is considerable advantage to be gained by cold storage for more unstable material. Conservation heating The above graph has implications for the effectiveness of expenditure in designing storage. Initially it can be used to select a suitable level of chemical stability for a collection. This is dependent on what is already known about the stability of the particular photographic materials in the collection and how long the photographs need to be kept in an acceptable condition. Within the physically safe quadrant it is easier and more cost effective to achieve the desired chemical stability by allowing a relatively broad range of relative humidity and narrow range of temperature (within the physically safe quadrant). However, some historic buildings without air conditioning tend to be cool but damp, particularly in winter. In such buildings 

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