SALES & SUPPORT

Previously, hard duct connection is widely used in Class II type A2 biological safety cabinet. Because the cabinet is connected to the exhaust blower, the airflow balance in the cabinet will be destroyed while the exhaust speed is unstable (increase or reduce). Consequently, operators, environment, and test samples can be contaminated severely. Class II type A2 biological safety cabinet is forbidden to connect with sealed hard duct by NSF 49 standard, but suggested to connect with exhaust canopy. The exhaust canopy is installed on top of the exhaust HEPA filter in biological safety cabinet, and left 2.5 cm of interstice for inhaling the air in the room to this exhaust system. This is the safest connection. The airflow in the cabinet is independent, so the airflow balance in the cabinet will not be affected by fluctuation of this exhaust system.

     For many laboratories, they think connection of exhaust duct to outdoor is safer than indoor after purchasing a type A2 biological safety cabinet. In fact, there is a HEPA filter at the exhaust outlet of biological safety cabinet, so the air will be filtered by HEPA filter before exhausting to outdoor. The safety of exhausted air is guaranteed, and it will not contaminate the indoor environment. You can be relieved for this concern, because international related organizations (such as NSF) will address discussions and reminders for the users, if there is a problem. In addition, if indoor treated air is exhausted to outdoor, it is very energy-consuming for the whole operation in a laboratory. The cost can be increased largely, so you should take a prudent consideration.a

The most simple way is to check whether this biological safety cabinet is approved by National Standard or not, such as NSF 49 or EN12469. If this biological safety cabinet is approved by National Standard which means its design, structure, and performance has reached the international safety level, so you can use by feeling relieved. There is a bonus effect for special function or design flaunted by other manufacturers, but those are unnecessary devices.
At the same time for looking approved products, the users have to pay attention on: when manufacturers claim their biological safety cabinet conforms to certain international standard, you can ask them show the examination report signed by one legal examination foundation. In addition, some standards might not have direct relationship with the safety of biological safety cabinet. For example, the manufacturer claims they are approved by ISO 9001 quality examination, but ISO 9001 is not applicable to international examination standard of biological safety cabinet. So, you should pay attention on this point.

In general, Class II biological safety cabinet is sufficient for normal demands, Class III biological safety cabinet is needed unless you have to process some unknown species, virus, and live tissues. For experiments processed with non-toxic, non-radioactive, or non-volatile chemical specimens, type A2 biological safety cabinet can mostly satisfy the requirements. Whether type B2 100% exhausted biological safety cabinet is needed or not, deliberate evaluation should be taken. The users have to specially pay attention on that the biological safety cabinet will be shut due to exhaust by duct connection, because insufficient exhaust amount (without compliance with manufacturer’s requirement).
In addition, from the viewpoint of energy-saving, type A2 biological safety cabinet can save more energy due to the circulation airflow which mostly exhaust into the indoor. On the contrary, type B2 biological safety cabinet is 100% exhausted to the outdoor which means the air in the laboratory will be exhausted, so its cost on air-conditioner is much higher than type A2.

Laminar flow hoods only provide the protection for test specimen, but the operator and environment. Biological safety cabinet can provide the protection for operator, environment, and test specimen simultaneously. So, from the objects needs to be protected, you can understand what kind of machine is applicable to you.

※ Special remind: horizontal or vertical laminar flow hoods are not biological safety cabinet, so can not be used in operation with biological hazard.

Warranty Policy
Dear users of YAKOS65 products,
First of all, thank you very much for choosing YAKOS65 products and giving us the opportunity to provide you with high-quality services.
In order to make our service more satisfactory to you, please read this description carefully after purchasing the equipment.

1. Technical support and maintenance services: We recommend that after purchasing or installing the equipment, you immediately register the product online, or fill out the product warranty card, take a photo and email it to our company. You must fill in all your user information to ensure your own rights.
2. Warranty period:
The warranty period is one year from the date of purchase or shipping.
If a product malfunctions under normal use by the customer and is identified as a problem with the product itself, our company will be responsible for repairs within the warranty period.
The warranty is limited to the product itself, accessories are not covered by the warranty.
3. Product warranty period:
One-year warranty: The date the main unit is shipped is the starting date of the warranty.
Warranty periods exceeding one year are the responsibility of the distributor.
Consumables are not covered by the warranty.
4. Non-warranty:
If the company determines that the following factors are involved, the company will not provide warranty even within the warranty period. The company will have the right to charge fees at its own discretion or refuse to accept the application.

No product registration record
Damage to products caused by humans
The warranty sticker has been changed or torn off
Natural disasters, floods, earthquakes, lightning strikes, voltage abnormalities, environmental factors and other force majeure disasters and human negligence.​
Placing it in a damp place or entering or immersing it in water may cause corrosion of the internal circuit boards.
New product returns and exchanges must indicate the store, item number, date, and confirm the cause of the defect.
Improper repairs, modifications or adjustments to parts, etc.
Failure or damage caused by movement or dropping after purchase.
Failure and damage occurring after the warranty period.
Avoid strong impact and heavy pressure, which will cause damage to the electronic components of the product.
Appearance scratches, peeling paint, or damage caused by natural disasters or human factors are not covered by the warranty and will not be replaced. However, you can decide whether to repair or replace consumables at your own expense.
5. Send for repair:
Please contact our company for processing Delivered by dealers or cooperative company.
6. Repair and shipping costs
Apply to our company, original purchasing agent or dealer.
Only after the fault phenomenon is confirmed to be a hardware failure by our company's authorized engineers, can it be replaced through our company, purchasing agent or dealer.
If the product is damaged during transportation, the customer will be responsible for it. Please be sure to package and ship it properly.
The owner retains responsibility for all repair products until they reach YAKOS65. Shipping insurance is HIGHLY recommended.
The warranty does not cover shipping costs, so if warranty repair is required, the customer must bear the shipping costs or have the contracted warranty company handle it for you.
Within the warranty period

No need to pay maintenance fees for replacement parts and repairs.
The product is delivered to our company, and the freight is borne by the customer.
The company will bear the freight for returning the product to the customer after repair.
Out of warranty period

Replacement of parts and repairs require a maintenance fee.
If replacement parts are not available, modification costs will apply after three years form the date of purchase or shipping.
The product is delivered to our company, and the shipping cost is borne by the customer.
Our company will bear the shipping cost for returning the product to the customer after repair.