LTP Technology – Low Temperature Plasma

LTP Technology – Low Temperature Plasma

Odour removal using NTP plasma technology. Effective air cleaning and odour removal using CAP Cleanair Plasma equipment

Treating air in commercial kitchens and mobile food service facilities, such as food trucks and display cooking: Effectively decreasing odors with low operating costs.

Plasma air purification technology is a technology for treating air or circulating air in which the smallest gaseous organic carbon compounds, such as odor molecules, are eliminated and bacteria and viruses are destroyed. Solids, i.e., grease and aerosols, are separated out in the initial pre-filtration stage. Plasma technology offers a large number of applications. These include purifying exhaust from commercial kitchens and food service facilities and effectively eliminating cigarette smoke, odors from waste storage rooms, bacteria, viruses, and other harmful substances contained in indoor air.

Plasma technology was developed to eliminate odors in the food services and in industry, and it has been used in these fields for many years as an effective way to purify exhaust. It is based purely on the principles of physics and, similar to UV ozone technology, it works entirely without chemicals.

Whole house ventilation systems can be equipped with this technology – as well as mobile food service facilities and fields such as display cooking or food trucks, for example. Products in the CleanAir Plasma CAP 600 to 10,000 line can be adjusted to company requirements. Our plasma systems are constantly effective and so energy efficient that they ensure compliance with the Energy Savings Ordinance (EnEV 2013).

CleanAir Plasma (CAP) technology by oxytec consists of four stages of operation:


    1. Pre-filtration with initial separation of solids & aerosols

    During the initial separation of solids, two mesh filters filter out coarse contaminants in the air. This effectively protects the next phase of the plasma technology. More protection is provided by an integrated sponge with with hydrosorbic properties. All the pre-filtration stages can be easily removed from the CAP system for regular cleaning.

    2. After pre-filtration, an electrostatic filter further removes substances

    This is elimination that happens by breaking down molecular structure using electric voltage. Solids or aerosols that have remained after pre-filtering are effectively separated out into a removable, easy-to-clean pan.

    3. Reaction processes and oxidation in the plasma technology stage

    The process of creating plasma that happens during high voltage induces reaction and oxidation processes during the flow of plasma electrons. The organically polluted exhaust is thus enriched with singleton oxygen, so that carbon compounds are either stimulated to react with oxygen or react with it directly.

    4. The activated carbon filter, the final stage, and reactive storage

    Compounds that were not oxidized are trapped by the activated carbon filter and oxidized there. Activated carbon functions as reactive storage, changing ozone (O3) back to oxygen (O2), for example. Activated carbon fluidly regenerates during the air purification and thus has a long life span.


    • The air temperature should not exceed 50°C (not common in kitchen exhaust)
    • On the basis of effective initial separation of materials and regularly cleaning the pre-filters, the air should be as free as possible of grease and aerosol particles.
    • Air humidity should not be higher than 95%.


    Kitchen exhaust

    • No harmful effect on the environment
    • No grease or aerosol particles
    • No noticeable kitchen odors
    • No harmful byproducts (thanks to Stage 4 of exhaust purification, no ozone is released into the environment)

    However, the exhaust essentially remains exhaust, not fresh air. In the end, it is used air from a quasi-industrial process.


    • Unconventional ventilation concepts can be implemented due to the components installed in the CAP system.
    • Odor pollution is eliminated.
    • It is possible to release exhaust into areas where there are people (streets with shops).
    • Thanks to compact construction, it can be easily used for preparing food in small kitchens, e.g., in shopping centers or display cooking stations.
    • Optionally, it can be used in heat recovery without additional costs.

    Effective heat recovery is possible:

    • The previously mentioned EnEV regulation on energy savings, starting at 4000 m³/h, if it is economically feasible
    • Heat recovery (cross flow)
    • Combined circulation system (KVS in German)
    • Conventional heat exchangers
    • Important for heat recovery design: a constant level of efficiency, because grease deposits are not excluded

    Technological Advantages over the Competition

    • A one-year warranty on all components
    • Significantly larger space for plasma reactions
    • Short-circuit shutdown of each plasma unit for fire safety reasons
    • Local companies can conduct maintenance after being trained
    • The lining of the interior casing is from stainless steel, according to VDI Standard 2052

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