New EU standard for ventilation in commercial kitchens
Smart demands for increased quality, safety and a greener worldEU’s new standard for equipment in commercial kitchens is long-awaited and well-produced. It covers everything from the hood to the point of discharge. The work took 14 years and aims to harmonise competition within the EU as well as setting quality requirements for functionality, safety and the environment. Air purification technologies are described in part 8 where requirements are defined for equipment for treating kitchen extract air. The air treatment reduces fire risk as well as odours. It is also a prerequisite for installing heat exchangers in the extract air stream for heat recovery. The methodology is now spreading in Europe and will considerably reduce energy consumption and carbon dioxide emissions. A driving force is the Eco design Directive, which states that products for heat recovery shall have a minimum thermal efficiency of 73% as of 1st January, 2018. We have read through the standard and what follows is a summary of how some of the treatment technologies are affected.
The eight parts of the new EU standard EN 16282*1. General requirements 2. Kitchen ventilation hoods 3. Kitchen ventilation ceilings 4. Air inlets and outlets 5. Air duct 6. Aerosol separators 7. Fixed fire suppression systems 8. Installations for treatment of aerosol; Requirements and testing *EN 16282 Equipment for commercial kitchens. Components for ventilation in commercial kitchens. The EU standard EN 16282-8 can be obtained from your National Organization for Standardization
The Ecodesign Directive – a focus on energy usageThe Directive was adopted by the EU in 2005 and is aimed at reducing energy usage, and thereby greenhouse gas emissions by 20%.
General requirements for purification techniques
- For technical safety reasons components in the air stream shall be designed to withstand a constant temperature of at least 60 °C. Cooling may therefore be required of extracted air
- The installation shall be easy to access for the purposes of maintenance and cleaning work
- Components in contact with UV radiation or ozone should be made in suitable materials
- If ozone is released at ground level, concentrations shall be below the applicable limit values
- If ozone sensors are used, they shall be labelled “OZONE SENSOR” and have a unique traceable calibration certificate
- Connections between the ozone generator and the grease duct must be labelled “OZONE” every ten metres
New requirements for UV equipment (ozone treatment based on UV lamps)
- The efficiency of a UV lamp is dependent on the temperature. For this reason, the maximum temperature specifi ed by the manufacturer should not be exceeded. Installation of cooling measures may be needed.
- The UV device shall be installed in such a way that the entire extract air volume flows past the UV lights. If necessary, suitable measures shall be taken.
- Safety equipment should exist that prevent UV radiation from having any eff ect on skin or eyes
- Flow/pressure sensor(s) shall ensure that ozone does not escape into the kitchen
- Hoods equipped with UV lamps shall carry a visible warning sign: “WARNING — UV radiation”
- Inspection hatches on the grease duct shall carry a warning sign that reads: “WARNING — Ozone Treatment”
New requirements for ozone generatorsFor ozone generators fed with oxygen (for example, our high-performance RENA system), there are now several new smart requirements.
- Installation, repair and maintenance shall be carried out by personnel trained by the manufacturer
- The ozone generator must only be operated when the exhaust fan is running
- Suitable equipment, such as fl ow/pressure sensor(s), shall ensure that ozone is not released into the building. If the system is equipped with a pressure sensor, it needs to be set up so that the ozone system is shut down should the pressure drop below 20 Pa
- Inspection hatches on the grease duct must carry a visible warning sign: “WARNING – Ozone Treatment”
New requirement for air-fed ozone generatorsIn addition to the general requirements for air treatment technologies and ozone generators, the standard specifies that oxygen-fed ozone generators shall be used for total extract fl ows exceeding 2,500 m3/h. The reason for this is that air-fed ozone generators produce to much nitrogen oxides and nitricacid. The standard states:
NOTE To safe-guard against NOx and HNO3 build-up in the extract air, an oxygen-fed ozone generator will be used for a total extract fl ow exceeding 2500 m3/h.
New requirements for photocatalytic air treatment (often called ozone-free UV light cleaning)F9 filters shall be fitted prior to the photocatalytic system. The filter must be resistant to ozone and UV. The filter shall not be fitted in the hood/ceiling For UV lamps, the maximum temperature specified by the manufacturer should not be exceeded Hoods fi tted with UV lamps shall carry a visible warning sign: “WARNING — UV radiation” Inspection hatches on the grease duct must carry a warning sign: ”WARNING — ozone treatment” Note! As this technology contains both UV and ozone, the requirements for each treatment technology must also be taken into account.
Here are the requirements you can ask for
- Capacity to remove air-borne grease during high airflows
- Capacity to treat air with high grease content
- Stable and consistent treatment capacity
- No components installed in the air flow
- Ability to prevent grease build-ups in ducts
- Does not disturb the ventilation balance
- High operational reliability
- Minimum maintenance requirement
- Minimum service requirement
- Minimum requirement for manual cleansing of ducts
- Low energy usage
- Low operational costs
- Minimum lifespan of 20 years
- Lowest total cost of all purification technologies over time
- The purification system should turn on/off when the ventilation system turns on/of
- Stepless variable treatment capacity
- Easy adjustment of treatment capacity
- Easy to upgrade the system’s total capacity
- Simple to install the distribution of the ozone – even when the ducts are difficult to access
- The ozone distribution should not interfere with the activities of the kitchen nor be aesthetically disturbing
- The ozone system should be able to be installed where it is out of the way of the activities being undertaken in the premises
- Remote 24/7 monitoring to detect any interference
- The system should include an ozone sensor which turns off the system if ambient ozone levels exceed set threshold. The sensor shall be supplied with a uniquely traceable calibration certificate
- One single system should be able to treat several kitchens in, for example, a food court
- For larger projects with high treatment requirement, several ozone systems should be able to be installed together
- Comply with requirements of EN 16282
You are always welcome to contact us if you have any questions about the standard or are interested in our solutions and ozone treatment in general.