Ktorá vzduchová clona je najtichšia? Aký veľký vstup bude vzduchová clona pokrývať? Aby zákazníci mohli presne porovnávať, musia všetci výrobcovia merať rovnakým spôsobom. Jednoducho povedané, aby sme porovnali jablká s jablkami. Odvetvie vzduchových clôn teraz zákazníkom uľahčilo správny výber pre ich konkrétne potreby.
Frico je iniciátorom Eurovent skupiny nazvanej “European Air Curtains”, ktorá sa zameriava na vzduchové clony. Jej účelom je vypracovať nové usmernenia. Dôležitou súčasťou je definovanie bežných metód merania, ktoré zákazníkom umožnia porovnávať výrobky medzi sebou. V skupine sú zástupcovia z dvanástich rôznych spoločností.
Previously, the usual way to indicate the sound level was the sound pressure level, a value that is dependent on the characteristics of the room and how far from the product the measurement was taken. Some manufacturers, such as Frico, have clearly stated the conditions under which sound levels were measured, while other manufacturers have used measurements taken in an unrealistic way and have been able to claim lower sound levels than were actually the case.
From July 2017, all manufacturers will report sound power levels (in accordance with ISO 27327-2) on their products. Sound power is the objective value and is not dependent on the characteristics of the room. This makes it easier for customers to compare different products with each other, which Frico has long wanted and supports. This value is higher than the sound pressure level, partly due to being based on a different logarithmic scale to the one used for sound pressure.
From 1 July 2017, both sound power and sound pressure levels for all air curtains will be specified in Frico's documentation.
There are many different methods for measuring airflow and air volume. Unfortunately, it is common in the industry not to report the conditions under which their airflow data was obtained. This results in nominal or free-blowing values (which are much higher) being reported and compared with actual values for the airflow coming out of the unit, giving a misleading comparison. There is now an agreement in the Eurovent group to measure airflow and thus obtain airflow data in accordance with ISO 27327-1 Labratory methods of testing for aerodynamic performance rating, which Frico has been doing for a long time. This ensures that all manufacturers will shortly be reporting values that can be compared.
There are a number of different ways to measure air velocity. The measurement of the air barrier’s velocity and uniformity is also part of the ISO standard 27327-1. Frico is already measuring all its air curtains according to this standard, and the results can be found in the air velocity profile for each of its products.
At Frico, we have one of the most modern and advanced air and sound laboratories in Europe to assist us and we measure according to the ISO standard. Our products do what we promise they will do. Thanks to the work with Eurovent, it is now also easier to compare our products with those of others.
Ola Wallander Product Area Director - Air Curtains and Heating