Why You Need Hospital Grade Air Purifiers

Why You Need Hospital Grade Air Purifiers

Hospital grade air purifiers are effectively inconspicuous devices, and they purify the air in hospital waiting rooms, hallways, operating rooms, and wards. By so doing, they aid ventilation and reduce the spread of diseases from healthy people inhaling or contacting germs and other contaminants that are released into the air by the immuno-compromised or the sick.

Hospital grade air purifiers are very common in hospitals, and this is for a reason. Hospital air is known to contain a high concentration of contaminants and Volatile Organic Compounds (VOC), and with patients, doctors, visitors, other workers, etc., moving through the hallways, it has become a paramount necessity for hospitals to install hospital-grade air purifiers to reduce disease spread and other health implications that can be caused by these contaminants and VOCs.

Volatile Organic Compounds and Hospital Grade Air Purifiers

Volatile Organic Compounds are usually liquid materials that can change form and evaporate into the air. Since they are common hospital materials, they may seem like chemicals that are inherent to the atmosphere. However, a high concentration of these chemicals in a space with inadequate ventilation could lead to the creation of compounds like butane and other anesthetic gases. It is for the specific purpose of collecting these chemicals from the air and filtering them that hospital-grade air purifiers become important.

  • Examples of VOCs that are common to hospital environments are;
  • Alcohol: this is a liquid chemical used in hospitals as solvents and disinfectants,
  • Formaldehyde: this can be found in plastic and lacquers,
  • Acetone: this chemical can be found in furniture polish, and wall paint,
  • Ethanol: This chemical is used in cleaning glass containers, and in hospitals, it is found in cleaning solvents and detergents,
  • Dichloromethane: this is found in aerosol and paint removers.

Places in the hospital where air purifiers should be Installed

Hospital Wards
Hospital wards can be contaminated with viruses and bacteria that could cause an asthmatic reaction. Depending on the equipment installed in the wards, and the types of gasses they emit, there could be events where they contain fumes and some amounts of carbon dioxide. With the risks of transmission of disease and contamination, hospital wards must have hospital-grade air purifiers installed. These wards include burn units, hospital wards, pediatrics, geriatrics, TB isolation wards, etc. Having a hospital-grade air purifier improves hospital ventilation and ensures that the hospital facility maintains a clean atmosphere with untainted airflow. These devices can also protect respiratory health by removing contaminants in form of mold spores before they get inhaled by patients.

Operating Theatres and ICU
A study of hospitals in China found a reduction in healthcare infections in hospitals where air purifiers were being used.[1] Patients coming out of surgery are usually at a high risk of infection from particles flying around the operating theatre or the ICU. However, with hospital-grade air purifiers installed and the air purified of all contaminants, it would become less likely for them to be reduced as the study cited above shows.

Hallways and Waiting rooms
It is typically demanded that at least 20% of hospital air should be fresh air from outside. However, this fresh air could contain germs and contaminants. Considering these risks, it is therefore important to install hospital-grade air purifiers in corridors and waiting rooms are essential for ridding the atmosphere of these contaminants before they get inhaled by patients and cause further health complications.

Sick Building Syndrome

Hospital grade air purifier devices are also useful in preventing what is known as Sick building syndrome (SBS.) Sick building syndrome is usually a result of poor ventilation and poor indoor air quality. As such, the syndrome and can be prevented by installing the right hospital-grade air purifier to remove viruses, bacteria, enzymes, and other particles from the air, and improving indoor air quality that may be tainted by the exhaust, moisture, and concentration of harmful chemicals.

Categories of Hospital Grade Air Purifiers

Hospital-grade air purifiers can be categorized by size as well as the budget of the person trying to purchase them. When buying hospital-grade air purifiers, factors like the space available for accommodating the devices, and the funds available for the purchase should be considered. Below are the several categories of Hospital-grade air purifiers that we have.

This air filter is very portable and easy to install. It is often hung on walls in hallways, waiting rooms, and wards. As the name suggests it is also budget-friendly and it is suitable for hospitals that have an HVAC system already installed.

These categories of air filters are larger than their budget-friendly counterparts and are also more quality. These air filter makes use of HEPA filters and allows for quite effective airflow. It uses activated carbon and zeolite in removing fumes, gases, and odors from over 700 feet of its environment. The middle-priced air purifier also runs silently, and with its build, it retains the capacity to trap more particles.

Step-Up Price
These hospital grade air purifiers take the cake in terms of quality and can purify the air of rooms with an area over 1000 square feet. They are the largest purifiers one can find, and they are the most suitable large wards or hospital halls. Equipped with HEPA filters, they are also capable of filtering the finest particles, and step-up filters are best installed in hospital wards that hold patients suffering from asthma or allergies.

What is HEPA filtration?

HEPA stands for high-efficiency particulate air. HEPA filters are mechanical filters that work by pushing collected air through a mesh while trapping fine particles, fumes, and smoke. The most effective air purifiers are determined by their ability to filter the finest particles, and as discovered by a NASA study[2], HEPA filtration is capable of filtering particles that measure down to 0.01 microns, making it the most effective yet known with most viruses and particles measuring between 0.06 – 0.14 microns, the most effective hospital-grade air purifiers should be equipped with HEPA filters.


[1] Zhing, Bingli et al. Analysis of Air Purification Methods in Operating Rooms of Chinese Hospitals. February 1, 2020. Bio Med Research International.
[2] Perry, J.L. Submicron and Nanoparticulate Matter Removal by HEPA-Rated Media Filters and Packed Beds of Granular Materials. June 5, 2017. NASA Technical Memorandum.

Blog Mist Collectors

What are mist collectors?

What are mist collectors?

Mist collectors are machines designed to clean the air by removing undesired oil & coolant mist, on metalworking machines as well as milling and grinding processes.

Oil mist is harmful to the health of machine operators as well as other people in an industrial shop. The metal cutting tools of machines are lubricated to keep metals cool while in action, reduce friction and protect their functionality. Oil mist is created when the oils used in lubricating metal come in contact with machining processes and are expelled as mist into the air. In situations with high temperatures, the oil could burn and turn into oil smoke that is also dispersed into the air.

Oil mist is harmful to the human system. People that are exposed to oil mist could suffer from irritation of the eye or skin, burning sensation in the mouth and throat, fever, rapid heart rate, shortness of breath, vomiting, headaches, etc. Exposure to oil mist could also result in cancer, and other skin and respiratory diseases. Employers could be at risk of litigation from employees who have fallen ill from exposure to oil mist as a result of poor indoor air quality in production facilities.

The exposure of industry workers to oil mist is also regulated by bodies like the Occupational Safety and Health Administration (OSHA) along with the National Institute for Occupational Safety and Health (NIOSH) and Association Advancing Occupational and Environment Health (AAORH). These bodies have exposure limits set to reduce the level of oil mist that workers are exposed to. For instance, OSHA limits exposure to 5mg/m3 for all employees that work 8hr/day and 40 hrs/week, and any employer that does not comply with these restrictions could risk a lawsuit or fines. Health and safety committees work to achieve a recommended limit of 0.3-0.5 mg/m3 to provide a safe working environment. To ensure that your industry stays within the stated guidelines, an industrial hygienist should be consulted to determine the air quality in your environment.

Staying within the permissible exposure limit is a necessity for employers, however, they cannot be achieved if effective mist collectors are not installed. There are two general types of mist collectors:

Tsugami Mist-Fit


Source capture (Machine Mount) Mist Collectors

Usually mounted on top of the machines, they are peripheral and filter air directly from the source. With this type of mist collector, oil or coolant is drained back into the machine, while the filtered air is released back into the working atmosphere.

It works by a multi-stage process:

Pre filtration
Primary filtration
Exhaust of clean air
Pre-filter – oil mist is collected into the pre-filter by a fan or blower immediately after leaving the machine. At this stage, coolant or oil mist is collected into larger droplets. are collected and drained back to the machine to be reused.

Drainage – Once mist is collected into larger droplets in the pre-filtration stage, they are drained back into the machine to be re-used.

Primary Filtration – At this stage, the finer particles are collected, and the air is purified by going through the final filter. The efficiency of the main filters varies by type.

· ASHRAE Filter (MERV): capable of filtering particles down to 0.5 microns

· HEPA Filter: capable of filtering particles down to 0.3 microns

· ULPA Filter: capable of filtering particles down to 0.12 microns

Exhaust of clean air – This is the final stage where the filtered, clean air is exhausted back into the atmosphere.

Ambient Mist Collectors

Are suspended from ceilings or installed on floor stands of the industrial facility and filter any particulates in the air created by production processes.

They work in a similar multi-stage process as source capture mist collectors. Ambient mist collectors often utilize progressive filtration stages to increase filter life.

Washable pre-filtration stages – Pre-filtration is used to collect larger particles of oil mist as well as other contaminants from the atmosphere. The collected oils are subsequently drained out of unit through a drain hose. Since they constantly collect and retain particles of varying degrees, these filters are washable and ought to be cleaned regularly to ensure proper functionality of the unit.

Primary Filtration stages – At this stage, the remaining particulates are removed from the pre-filtered air using filtration with a higher efficiency rating

Filtered air – Filtered is exhausted back into the industrial shop

Specifics To Look Out For When Purchasing A Mist Collector

There are serval good mist collectors in the market, however, choosing an effective one would require that you consider the specifications indicated by their manufacturers to see if they are suitable for your industrial air quality needs. The following are specifics that industries should look out for when purchasing a mist collector:

· Installation indicates how the mist connectors are to be mounted and connected for optimum performance

· Power specifications voltage requirements to power the mist collector

· The efficiency or MERV rating of filters shows the percentage of oil mist or particulates of a specific size in microns that can be collected by the mist collector.

· Delivered Airflow indicates the amount of airflow that a mist collector can deliver factoring airflow loss due with filters installed. Usually measured in cubic feet per minute.

· Minimum particle size is measured in micrometres. Signified with the unit µm, they show the minimum diameter of aerosol that a mist collector is capable of filtering.

· Size specifications indicate the dimensions of the mist collector unit. They are usually measured in feet (ft) and inches (in), and they go a long way to help an industry decide based on the machines and environment that they want it would apply to.

· The sound levels of mist collectors are also indicated to show the amount of sound that it would produce in operation. They are measured by sound decibels (dBA). However, good mist collectors should not rate high on their sound levels, as they should be able to run quietly.

· Maintenance intervals this determines how frequently the filter or collector must be cleaned or replaced.

· The weight of the mist collector is also given in pounds (lbs).