Ceiling Grid UVC Air Purifier

The Ceiling Grid UVC Air Purifier But first a little background. We have a long history in the ceiling grid UVC air purifier market. For many years we supplied a product from our other key UVC air purifier supplier, Sanuvox. The Sanuvox unit was perfectly effective although its one glitch was that it was manufactured with imperial dimensioned ceiling grids rather than metric ones. The result was a unit that was slightly larger than ideal and an overly tight fit for metric dimensioned ceiling grids that are standard in Europe. We eventually stopped selling them because the CE certification lapsed as the regulations this side of the Atlantic developed and the components in the unit did not. And so for at least 3 years we have had a hole in our range, until Sodeca launched the UPT ceiling grid UVC air purifier. ceiling grid UVC air purifier ceiling grid UVC air purifier diagram Sodeca UPT ceiling grid UVC air purifier - Aesthetic Design The thing that Sodeca have cracked, that others have not, is the aesthetic aspect. Often ceiling grid air purifiers have limited symmetry and have both air inlet and air outlet in the visible face. This inevitably means that the appearance does not follow the ceiling grid aesthetic convention where every thing is square. Sodeca solve this problem by having a square inlet grille in the centre of the unit. The outlet is a narrow perimeter slot that is only just visible because the face of the unit hangs under the ceiling grid by less than an inch. Sodeca UPT ceiling grid UVC air purifier - Mechanical Design Because of the square central inlet in the face of the unit, the mechanicals above are similarly symmetrical. A square mesh pre-filter, a square H14 grade HEPA filter, a 4 lamp square UVC clamber and a centrifugal plug fan mounted with 4 fixing points. The fan pulls the air through the filter stages and UVC chamber and changes its direction before expelling it through the perimeter discharge slot. In terms of mechanical symmetry and aesthetic, it could not be better. Sodeca UPT ceiling grid UVC air purifier - Product Variants The UPT ceiling grid UVC air purifiers all have a HEPA H14 filter as part of the package. This means that the microorganisms that you are aiming to zap with a dose of UVC will invariably be caught by the HEPA H14 filter in any case, so it is arguable that the UVC is almost surplus to requirements as it is down stream of the the UVC stage. If that is your view then there is the option to have the unit without the UVC stage. The UPT range comes with a choice of fan motor. An AC motor version with an air flow of 150m3/hr and the other with an EC motor which has a higher air flow 350 m3/hr. Sodeca UPT ceiling grid UVC air purifier - UVC dose The germicidal effectiveness of any UVC based air purfier is dependant on the wavelength of UVC light from the lamp, the intensity of that light within the chamber and the length of time that the air is exposed to that light as it passes through the chamber. EC motor with the higher air flow of 350 m3/h delivers a UVC dose top the passing air of 5.3mJ/cm2 which is very respectable and would be expected, with ease, to have 1st pass efficiency of over 99% efficiency against COV-2 virus. The AC motor version which has a lower air flow of 150m3/hr delivers a massive UVC dose to the passing air of 12.4 mJ/cm2. This is far higher than we have ever seen in any comparable machine. With these figures it would be daft to choose the AC version instead of the EC version particularly if you are looking to use in a larger room. How many ceiling grid UVC air purifier to use ? If the ceiling grid UVC air purifiers are being used to make a workplace relatively 'covid safe' then the formula to use is based on achieving an air change rate of around 12 air changes per hour. The reasoning behind this is identical to the reason why we used the same air change rate for air cleaners to treat cigarette smoke in pubs and clubs when that was an issue. The motive behind such a high rate is to control quicker than it has a chance to spread. Better to change or treat the air every 5 minutes than say every 20 or 30 minutes. If there is any pre-existing mechanical ventilation system that brings in fresh air then factor this in to the calculation. Here’s an example;

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