ISCLEANAIR at Hannover Messe April 24-26 ISCLEANAIR at Hannover Messe April 24-26 ISCLEANAIR at Hannover Messe. Pitch and B2B Technology&Business Days for SMEI – Phase 2 with EASME on April the 24th to the 26th Share this post By admin|2018-05-30T13:15:27+00:0021 May 2018|