Laboratory Fume Hood

Laboratory Fume Hood-A Complete Buying Guide by Sunnyda.

As there are various chemical reactions taking place in a laboratory, there is a high chance of large production of toxic byproducts. These harmful chemicals can be harmful if concentrated in the laboratory and therefore it is necessary to eliminate them.

A Laboratory Fume Hood is responsible for expelling all the toxic chemicals from the laboratory with an efficient mechanism.

It is a sophisticated system consisting of a specialized ventilation system. You can have the option of customization in terms of energy conservation and space occupation.

The goal is to obtain a chemical-free environment that is safe to breathe in.

The construction is of a corrosion and heat resistant material that is well laminated.

It offers low turbulence if designed and positioned correctly. There is minimum nuisance and vibration produced and thus works smoothly.

With components like a primary filter and air handling system, it can make the atmosphere free of toxic chemicals.

There are many other unique features and benefits mentioned in this buying guide that help you obtain maximum productivity in your laboratory. So let’s begin.

Laboratory Fume Hood Testing

What is a Laboratory Fume Hood?

A Laboratory Fume Hood is a specially designed machine that eliminates the harmful fumes and toxic chemicals or particles from your laboratory.

Due to the chemical reaction taking place in a laboratory, there is often the accumulation of toxic substances that can be harmful to the health of people working there.

Being equipped with a HEPA filter and other features like a strong microprocessor unit and low maintenance functions, it is the best choice to keep your laboratory safe and healthy.

Whether it is a clean room or a laboratory, a Laboratory Fume Hood can be very helpful in maintaining a toxin-free environment.

The added features include silent working and internet easy installation and maintenance.

You can increase its efficiency by adding certain accessories but the main unit works the best with high-quality raw materials.

Sunnyda Laboratory Fume Hood

What are the Major Features of a Laboratory Fume Hood?

The major features of a Laboratory Fume Hood include:

• It consists of a series of unit filters that are responsible for recirculating the clean air and passing it back into the laboratory.

• There are HEPA filters and carbon filters which clean the air and separate the contaminant particles.

• It can either be ducted or ductless depending upon the type of performance required.

• You can skip the expensive ducting by using filtration units that enhance the recirculatory flow.

• There is good internal lighting for better illumination. Fluorescent bulbs are specifically used.

• A cable pass-through port is installed which allows the electrical cords to reach the work zone.

• A safety alarm is there for indicating any danger in terms of high temperature, increased humidity, or an alarming concentration of toxic substances.

• The face velocity below 0.3M/sec is also not tolerated and the alarm goes off.

• It has a silent and smooth function with minimum vibration and friction.

• Tri directional viewing can be obtained by clear acrylic panels.

• The ductless assembly can be easily installed and removed. Its maintenance is also easy.

• As it is composed of acrylic sheets, the cleanliness schedule is light.

• It comes with a high-functioning microprocessor unit that enables electronic monitoring.

• The easy interface makes its operation convenient and reliable.

• Its main structure has four parts named according to the location.

Features of Laboratory Fume Hood

What are the Specifications of a Laboratory Fume Hood?

The specifications of a Laboratory Fume Hood are mentioned here:

• Its outer dimension is 1200*850*2350mm which is the length, width, and height respectively.

• The auto sliding door is vertically adjustable and the max door open is 820 mm.

• The material used for the working board is white PP with a thickness of at least 8mm. It is designed to create a bent unit so that there is minimum spilling over. There is an option of ceramic, epoxy resin, or physicochemical board.

• The power required is AC220V, 50~60HZ.

• The airspeed at the exhaust flux is 0.5m/s.

• The gas collecting hood is specifically a conical neck type for maximum efficiency.

• The operation panels consist of transparent tempered glass which is at least 5 mm thick.

• The standard parts include a power switchboard, power sockets, fluorescent cover, PP sink, valves to control pure water, and valves to control pipe water.

• There are cups and sinks for each unit.

• Explosion-proof lighting is available.

• A sound and light alarm helps in indicating any undesirable condition.

• There is a touchpad and converter control for better operation and usage.

• The surface wind speed detection can be obtained with venturi and butterfly valve

Specification of Laboratory Fume Hood

What is the Function of a Laboratory Fume Hood?

The function of a Laboratory Fume Hood is to allow ventilation to protect the workers in the laboratory from toxic chemicals from the chemical fumes.

The local exhaust ventilation system of each unit controls the exposure of the people to hazardous chemicals which can be inhaled if they reach a certain concentration.

A small quantity of toxic substances is bearable but it is highly dangerous to let these chemicals accumulate and therefore it is necessary to allow better airflow so that these chemicals can be removed.

Whether you are directly dealing with hazardous substances or not, it is important to install a fume hood because toxic substances can accumulate as a result of non-hazardous reactions.

These substances include dust, mist, and some volatile liquids.

Exhaust Ventilation System of Laboratory Fume Hood

What is the Working Principle of a Laboratory Fume Hood?

The working of a Laboratory Fume Hood is based on recirculation. The air is drawn from the contaminated space along with the toxic particles.

The air brings the contaminant particles along with it. This air is taken in from one side and then directed either to the outside or is fed into the filter.

If it is directed outside, it is expelled without filtration. This is not an effective method as it can lead to the contamination of the atmosphere and can be harmful to the environment.

The toxic chemicals are not biodegradable and therefore they can cause health deterioration in both animals and humans breathing the contaminated air.

Whereas when the air is directed towards the filtration unit, all the toxic particles remain as the residue, and clean air is recirculated back into the laboratory.

What are the Benefits of Laboratory Fume Hood for your Applications?

A Laboratory Fume Hood has the following excellent benefits that can improve your productivity:

• It is responsible for reducing the concentration of toxic substances in the laboratory. Lower concentrations are not harmful.

• The maintenance of a low concentration of toxic chemicals can be obtained over a long period.

• As it is corrosion-resistant, it lasts several years despite being used in a contaminated environment.

• Heat resistance is also offered so you don’t have to worry about heat damage when dealing with exothermic reactions.

• All the contaminants are collected in the hood and can be removed after one complete cycle.

• The productivity of the reaction taking place in the laboratory is enhanced as there is no contamination in the air.

• It reduces the exposure of the persons working in the laboratory thus reducing the chance of diseases caused by chemicals.

• A ductless fume hood is very easy to install and is not very expensive.

• It needs little maintenance and no technical support is required now and then.

• There is no operation sound and nuisance as it has a smooth function.

• The easy interface makes it possible to be operated by anyone and so it does not require a technician all the time.

• The efficiency can be maximized by using accessories such as a pre-filter and an additional exhaust system.

• Allows better airflow which creates a comfortable working environment in the laboratory.

Corrosion Resistant Stainless Steel Laboratory Fume Hood

What are the Applications of Laboratory Fume Hood?

A Laboratory Fume Hood is extensively used in the following places:

• Chemical Laboratories

• Semiconductor Laboratories

• Pharmaceutical Laboratories

• Medical Laboratories

• Electronic Devices Development Areas

• Food And Beverage Inspection Laboratories

The goal is to obtain the protection of the people working in the laboratory, the reaction is carried out and the materials present in the laboratory.

A Lab Technician Doing Experiment in the Laboratory Fume Hood 

What is the Difference Between Laboratory Fume Hood and Biosafety Cabinet?

Although both these devices serve the function of cleaning and decontaminating the air to protect the people working in the laboratory from toxic substances.

However the difference is in the mechanism of action, structure, precision, the type of contaminant, and the degree of protection offered.

A Laboratory Fume Hood uses an exhaust system for the removal of air and recirculates the clean air into the laboratory. However, a biosafety cabinet has a much more precise function.

It not only deals with dust, aerosol and chemical particles but also deals with bacteria and viruses. The former is not able to filter bacteria and viruses and therefore is less effective in this regard.

Based on the application and the type of reactions being carried out in the laboratory, a biosafety cabinet reduces the chance of diseases caused by microorganisms.

These diseases are not just difficult to treat but also contagious. Therefore if you are working in a medical or a pathology laboratory, you need a biosafety cabinet for the best protection.

It also reduces the chance of the spread of disease from one person in the laboratory to the other.

Biosafety Cabinet VS Laboratory Fume Hood

When Should you use a Laboratory Fume Hood?

A Laboratory Fume Hood shall be used under the following conditions:

• When a chemical reaction is being carried out in the laboratory.

• During the processes like welding, heating, manufacturing of electronic devices, etc.

• Upon receiving the indicator of a high concentration of contaminants in the air.

• When a chemical container or a test tube or vial is broken by accident.

• In case of an exothermic reaction that produces heat as well toxic chemicals.

• Manufacturing of aerosol sprays.

• If a person working in the laboratory feels uncomfortable in the environment. For example shortness of breath, itching, and watering in the eyes and dizziness, etc.

A Researcher is Dealing With Toxic Chemicals in a Laboratory Fume Hood

What are the Different Types of a Laboratory Fume Hood?

The different types of a Laboratory Fume Hood are explained below:

Benchtop Type

It is the most common type which is placed on a work surface at a shelf above the floor.

It might require an exhaust blower, a base cabinet, and a work surface. It needs precise ducting and piping which makes it difficult to install.

The duct also adds to the price of installation.

Floor Mounted Type

It is a walk-in-type fume hood that is installed on the floor and does not need a higher surface.

You can also walk into it like a small room. You need this type when you are working in bigger laboratories and dealing with large tools and instruments.

You can also bring your tools in it through its automatic sliding door.

There are several size options available and also you can get it customized according to your application.

Double Faced Type

It is a preferred choice because it has two doors and there is an entry from both sides. You can have a clear 360 degrees view.

You can either install it on a work shelf or mount it on the wall. It is best for shared environments where you can take it to various locations.

Portable Type

The most convenient Laboratory Fume Hood is the portable type. It is also called a recirculating unit.

There is no duct system and therefore its installation is quite easy. Also, it is affordable and uses a carbon filtration system.

It is energy efficient and you can carry it to any location you want. Due to its lightweight and easy assembly, it is convenient to carry it around the laboratory.

There are various size options but mostly it is small and has wheels for easy transport.

The mechanism of working in a portable type is such that it cannot deal with more than 10 chemical contaminants.

Therefore it shall be used according to the contaminant concentration.

Portable Laboratory Fume Hood

How to Inspect the Functions of your Laboratory Fume Hood?

The functions of a Laboratory Fume Hood can be inspected through the functional performance tests after every 18 months.

These tests cover the efficiency and performance of the following factors:

• Monitor Performance

• Face Velocity

• Sound

• Tracking Ability

• Plumbing

• Lighting

• Sash

• Corrosion

• Heat Damage

• Baffles

To test it, follow the given procedure:

Start by dividing the opening of the hood into equal grids. Each side shall be equal to 12 inches. You should have approximately 6 grids.

Place the tip of the vane anemometer probe in the plane of the sash opening.

The face velocity of each grid should be taken after at least 6 measurements. 10 measurements shall be taken for the best results.

These measurements shall be made in under over 10 seconds.

A Technician is Monitoring Laboratory Fume Hood Performance

What are the Prominent Accessories of Laboratory Fume Hood?

The important accessories required for enhancing the function of a Laboratory Fume Hood are listed down below:

• Storage Facility

• Prefilters

• Outlet and Dry Cup

• Electronic Monitoring System

• Gas Tap

• Box Section Support Stand

• Lockable Casters

• Enclosed Support Stand

• Double Switch Socket Outlet

Laboratory Fume Hood Accessories

What are the Differences Between Ducted and Ductless Laboratory Fume Hood?

A ducted Laboratory Fume Hood requires an elaborate network of ducts installed within the building in which the laboratory is situated.

• It has a ducted enclosure and goes with the framework of your building.

• The HVAC system is used to remove the contamination from the building.

• It is equipped with a hood, blower, base, work surface, and a duct system.

• Ducting system is difficult and expensive to install however it is more efficient and removes a greater variety of contaminants.

• Optimal air balance is provided due to the HVAC system. 

• It is difficult to relocate and uses more energy to operate.

A ductless Laboratory Fume Hood has the following properties:

• It can only deal with less than 10 chemical contaminants and has a lesser efficiency.

• Relocation and transport are easy as it does not require elaborate installation.

• It works through a carbon filter.

• Being an affordable option, it does not require much maintenance.

Ducted VS Ductless Laboratory Fume Hood

Can a Biosafety Cabinet be Used as Laboratory Fume Hood?

A biosafety cabinet is more precise and accurate than a Laboratory Fume Hood.

If you are using it in a medical laboratory or a pathology laboratory where there is an increased chance of spread of infection, it can be used as a fume hood.

However, if the reaction taking place in the laboratory does not involve the growth of microorganisms and risk of infectious diseases then it is not necessary to install a biosafety cabinet because you can obtain the same function from a well-established fume hood as well.

Biosafety Cabinet

Why Do you Need Laboratory Fume Hood When Working With Methanol?

Methanol is an extremely toxic and volatile substance. It must be dealt with extreme care and never be handled without wearing nitrile gloves and safety goggles.

Wearing a lab coat is also necessary as its splashes on your body can be extremely intoxicating.

Due to its volatile nature, methanol vapors can be inhaled by people working in the environment and it can be life-threatening.

Therefore, using a Laboratory Fume Hood is highly important while working with methanol. Other laboratory protocols also must be followed.

There is also an increased chance of fire because methanol is a flammable substance and can initiate fire with the minimum possible source.

A Scientist Carefully Dealing With Menthol in Laboratory Fume Hood

What are the Pressure Considerations for a Laboratory Fume Hood?

A Laboratory Fume Hood shall have a negative pressure to attract the contaminant particles.

As substances move from an area of positive pressure to an area of negative pressure, without any expenditure of energy, it is a spontaneous process.

Negative pressure aids in its function and reduces its operation cost. If any substance is to be transported from an area of low pressure to higher pressure, it needs a high level of energy thus making it a nonspontaneous process.

Negative and Positive Pressure of Laboratory Fume Hood

What Special Chemicals Require for your Laboratory Fume Hood?

The chemicals required for a Laboratory Fume Hood are listed below:

• Toxic Gases

• Volatile Toxic Liquids

• Aerosol Sprays

• Odorous Materials

• Spattering Chemicals

• Flammable Substances

• Carcinogens

These substances can cause serious damage to the health of the people working in the laboratory.

Contact of these substances to the skin and mucous membrane can trigger a severe reaction and leave long-lasting effects on the sensitive body.

These substances can also cause corrosion or initiate a fire which can be difficult to control. These don’t need to be present in the laboratory in the raw form.

Dealing With Chemicals in Laboratory Fume Hood

What is the Construction Material of a Laboratory Fume Hood?

A Laboratory Fume Hood can be constructed from the following materials:

• Fiber-Reinforced Plastic

• Square-Corner Stainless Steel

• Epoxy Resin

• Cement Board

• Cover Corner Stainless Steel

The control panel is constructed of:

• A warning of low airflow

• Switching to turn the exhaust fan on or off

Construction Material for Laboratory Fume Hood

What to Do When the Laboratory Fume Hood Alarm Goes off?

When the Laboratory Fume Hood alarm goes off, the first thing is to evacuate the place as there is a chance of fire and explosion.

• Push the emergency button and call for professional help as soon as possible.

• Make sure no flammable chemicals are lying around in the laboratory.

• Any corrosive material shall also be put aside.

• Open the lab windows to allow maximum airflow and ventilation.

• Make sure that the hood is being operated on or below the sash arrows. If the alarm does not stop, close the sash. Wait sometime after closing the sash and then reopen it. This time, it should be at your working height.

Turning Off the Laboratory Fume Hood With Remote Control

How to Maintain your Laboratory Fume Hood?

A good maintenance routine allows maximum efficiency leading to maximum productivity of your application.

By following the given maintenance schedule, you can increase the life and efficiency of your Laboratory Fume Hood:

Daily Inspection 

• Look for any blockage or obstruction in the pipes and the vents.

• Check the fume hood area for the accumulation and storage of any contaminant particles.

• Check the function and efficiency from time to time.

• Measure the face velocity with the help of an anemometer and velometer. There should be no more than a 20% change in the face velocity. This range is safe and can be tolerated for some time. Use at least six readings to determine the final face velocity.

• Check the filters for any accumulated material.

• Look at the prefilters and replace them if required.

• Replace any damaged part or fix it as soon as possible.

• Keep a register to enter all the attempts to clean and maintain it.

Annual Maintenance 

• Keep a check on the lubrication of all the parts so that there is no friction and no chance of fire.

• Go for belt tension and maintain it for the exhaust fan.

• Look for any blade deterioration.

• Replace the old filters with clean ones.

• Clean all the ducts as a part of the maintenance of the building.

Laboratory Fume Hood Maintenance 

How to Work Safely in your Laboratory Fume Hood?

To work safely in your Laboratory Fume Hood, you must adopt the following ways:

• Always follow the proper protocols of working in a laboratory.

• Wear the lab coat, gloves, safety goggles, and mask all the time.

• Carefully handle the test tubes and vials containing toxic chemicals.

• Take precautionary measures before carrying out any experiment.

• Maintain an optimum temperature and humidity level in the laboratory.

• A Laboratory Fume Hood shall be installed away from activities that cause turbulence or disturbance.

• It shall also be placed away from facilities which produce current or work by using electricity.

• Don’t wear any perfume or any other cosmetics as they contain alcohol and alcohol can catch fire.

• Don’t work near a flammable substance storage area.

• Don’t handle the corrosive materials without any precautions.

• Make sure all the alarms and safety components work well.

• Never light a cigarette in a laboratory.

• Keep a check on all the wirings and insulation.

Working Safely in Fume Hood

Conclusion.

To obtain the best possible results with minimum interference from contaminant particles, you require a Laboratory Fume Hood which can help you get rid of them. This will help you save on the time and money spent on multiple experiments.

You can enhance the efficiency of your Laboratory Fume Hood by pairing it up with a prefilter and other accessories. Reliability and durability can be increased by using the best quality raw materials.

Excellent Quality of Laboratory Fume Hood