You can order a custom size laminar flow hood from us. We can produce a hood that fits the space you have available. Feel free to inquire if you think that our standards models do not fit your needs. Do not worry if you are not a 100% sure what kind of a machine you need in your line of work. Once we start communicating ideas, it will be clear what may be the best cost effective solution. We will prepare a short, one page proposal and a drawing outlining how we intend to realize your idea. It will include costs and estimated time-frame. If you prefer to sign a non-disclosure agreement that is fine as well.
What determines the cost?
There are several factors that greatly affect the cost of a custom laminar flow hood. Some things to keep in mind are the size of the filter, speed and the level of comfort. In general, the bigger the filter, the larger the cost. This is because more air needs to pass through a larger area in order to achieve the same speed. When we need to push more air through a larger filter we need to install a more powerful blower. However, we have managed to achieve very low noise levels in our latest models. If you have a reference hood we will be happy to demonstrate the difference in noise between Shelly hoods and others.
What is the difference between a vertical and a horizontal laminar flow hood?
The difference between a horizontal laminar flow hood and a vertical model is in the location of the filter. In the vertical model, the clean air is blowing down, while in the horizontal model, the air is flowing toward your body. You can choose between the models based on the space you have available and also whether you plan to work primarily with liquids. Vertical flow hood takes less footprint on the bench and having the filter on top, it is less likely that you will spill any liquid on the filter.
What determines filtration efficiency?
Filtration efficiency is determined by the grade of a filter. You can learn more about filtration efficiency here. We can produce the machines with either H13 or H14 filter.
Why is testing done?
This is the most confusing thing that new hood owners face. A novice is lead to believe that spending more money is directly proportional to more “safety”. You can test your machine to check the efficiency of the HEPA filter and also air flow speed. The regulatory body of a professional organization can choose which recommended standard their membership should follow and how often they should test the hood.
HEPA testing is a lucrative business and therefore building a large client base that will ask for frequent testing is great way for a company to generate revenue while having no overhead and investing minimal effort. Sometimes a testing company has a conflict of interest because they also sell laminar flow hoods. They will usually find problems with other manufacturer’s hoods, but luckily they conveniently sell a more expensive machine and recommend frequent filter change. In reality, they just import a Chinese made machine and sell it to you at an inflated price. Have questions or concerns? Contact us!