{"id":15955,"date":"2022-02-28T06:45:12","date_gmt":"2022-02-28T05:45:12","guid":{"rendered":"https:\/\/mag.ebmpapst.com\/en\/?p=15955"},"modified":"2026-05-18T15:11:32","modified_gmt":"2026-05-18T13:11:32","slug":"the-air-volume-is-identical-in-both-directions-of-rotation","status":"publish","type":"post","link":"https:\/\/mag.ebmpapst.com\/en\/industries\/refrigeration-ventilation\/the-air-volume-is-identical-in-both-directions-of-rotation_15955\/","title":{"rendered":"\u201cThe air volume is iden\u00adtical in both direc\u00adtions of rota\u00adtion\u201d"},"content":{"rendered":"\n

Mr. Sieger, why is the AxiRev needed?<\/h3>\n\n\n
\n
Tobias Sieger, respon\u00adsible for the venti\u00adlation design and flow simu\u00adla\u00adtion during the devel\u00adop\u00adment of the AxiRev. (Photo | ebm-papst)<\/figcaption><\/figure>\n<\/div>\n\n\n

With increasing require\u00adments for envi\u00adron\u00admental protec\u00adtion and energy effi\u00adciency, more and more build\u00adings are being insu\u00adlated and rooms are being sealed airtight. However, to ensure a healthy, pleasant indoor climate, a different form of air exchange is required. Decen\u00adtral\u00adized resi\u00adden\u00adtial venti\u00adlation units are being increas\u00adingly used for this purpose because they can be easily installed in existing building facades. However, the fans used face several chal\u00adlenges, which the AxiRev solves in an optimal way.<\/p>\n\n\n\n

What are these chal\u00adlenges?<\/h3>\n\n\n\n

Firstly, the fans have to deliver a constant air flow in both direc\u00adtions of rota\u00adtion, even when the wind force changes. Secondly, they should operate very quietly while consuming as little elec\u00adtricity as possible.<\/p>\n\n\n\n

And the AxiRev does all of that?<\/h3>\n\n\n\n

Yes, we have devel\u00adoped the new AxiRev reverse fan specif\u00adi\u00adcally for these push-pull appli\u00adca\u00adtions. In this type of appli\u00adca\u00adtion, the fan changes its direc\u00adtion of rota\u00adtion every minute. We equipped it with new low-noise motor tech\u00adnology and an inno\u00adv\u00ada\u00adtive aero\u00addy\u00adnamic design. The result is a uniform air flow, pleasant noise level, and maximum energy effi\u00adciency.<\/p>\n\n\n\n

How did you make it wind\u00adproof?<\/h3>\n\n\n\n

The char\u00adac\u00adter\u00adistic curve is very steep, which means that, even in stormy weather condi\u00adtions, there are only slight fluc\u00adtu\u00ada\u00adtions in the air flow. This means that wind and storms have little influ\u00adence on the effi\u00adciency and func\u00adtioning of the decen\u00adtral\u00adized resi\u00adden\u00adtial venti\u00adlation unit. The almost symmet\u00adrical blade design ensures that the char\u00adac\u00adter\u00adistic curve and thus also the volume of air conveyed are iden\u00adtical in both direc\u00adtions of rota\u00adtion.<\/p>\n\n\n

\n
<\/figure>\n<\/div>\n\n\n

How did you reduce the noise?<\/h3>\n\n\n\n

This is based on a wide range of design and aero\u00addy\u00adnamic details. The striking blade tips and the open\u00adings at the ends of the blades mini\u00admize noise induced by the tip gap vortex, which in turn reduces the noise emis\u00adsions. The thir\u00adteen struts with an aero\u00addy\u00adnamic profile also reduce turbu\u00adlent trails, which ensures a very good psychoa\u00adcoustic noise quality.<\/p>\n\n\n\n

This means that the fan is not only quiet but its oper\u00adating noise is also perceived as pleasant. The highly effi\u00adcient EC motor devel\u00adoped espe\u00adcially for this appli\u00adca\u00adtion also works without annoying commu\u00adta\u00adtion or switching noises, even at extremely low speeds\u200a\u2014\u200aand flow design and motor tech\u00adnology also enable very low energy consump\u00adtion.\u2002<\/p>\n","protected":false},"excerpt":{"rendered":"

Mr. Sieger, why is the AxiRev needed? With increasing require\u00adments for envi\u00adron\u00admental protec\u00adtion and energy effi\u00adciency, more and more build\u00adings are being insu\u00adlated and rooms are being sealed airtight. However, to ensure a healthy, pleasant indoor climate, a different form of air exchange is required. Decen\u00adtral\u00adized resi\u00adden\u00adtial venti\u00adlation units are being increas\u00adingly used for this [\u2026]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"wp_typography_post_enhancements_disabled":false,"footnotes":""},"categories":[16,9,234],"tags":[],"class_list":["post-15955","post","type-post","status-publish","format-standard","hentry","category-fans","category-refrigeration-ventilation","category-_export_20250528"],"acf":[],"_links":{"self":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/15955","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/comments?post=15955"}],"version-history":[{"count":1,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/15955\/revisions"}],"predecessor-version":[{"id":23106,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/posts\/15955\/revisions\/23106"}],"wp:attachment":[{"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/media?parent=15955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/categories?post=15955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mag.ebmpapst.com\/en\/wp-json\/wp\/v2\/tags?post=15955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}