--- title: "PLENUM" url: "https://www.stylepark.com/en/thonet/plenum" language: "en" type: "product" description: "PLENUM - Designer by Thonet ✓ Comprehensive product & design information ✓ Catalogs ➜ Get inspired now" published: "2026-10-28T10:13:00+01:00" modified: "2026-10-28T10:13:46+01:00" image: "https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_1410xAUTO_fit_center-center_90_none/Thonet_PLENUM_04.jpg" --- [![](https://www.stylepark.com/assets/articles/THONET_2018.png)](https://www.stylepark.com/en/manufacturer/thonet) # Thonet PLENUM Presented: [Orgatec 2026, Cologne](https://www.stylepark.com/en/fair/orgatec-2026-cologne) | Year of design: 2026 ![PLENUM](https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_1410x940_crop_center-center_none/Thonet_PLENUM_04.jpg) **PLENUM: smart seat numbering – no batteries required** As an e-paper display module that requires neither maintenance nor batteries, the PLENUM seat numbers can be mounted on or recessed into the backs of various Thonet chair models. They can display seat and row numbers, as well as logos, icons, QR codes and custom texts. Using a smartphone app developed by Thonet, event organisers prepare the content and send it to the seat number simply by holding the phone up to the module. An induced current provides sufficient power to update the screen within a few seconds without needing batteries. The monochrome display can also be switched between a daylight and a dark mode. PLENUM is compatible with many different Thonet event and conference chair models. Its battery-free technology means the system requires no servicing and the information displayed on the modules can be updated quickly and reliably. The sleek app includes several layout templates, and users can also create custom designs. This allows seating plans to be adapted flexibly to different requirements and events. No additional hardware or software is needed to update the module displays. ![Thonet PLENUM 01](https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_697xAUTO_fit_center-center_none/Thonet_PLENUM_01.jpg)![Thonet S762 F S762 SP S762 PF Bu TP29 FF 799b](https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_697xAUTO_fit_center-center_none/Thonet_S762F_S762SP_S762PF_BuTP29_FF_799b.jpg)![Thonet S 762 F Bu TP29 RAL9005 FF 769b](https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_697xAUTO_fit_center-center_none/Thonet_S_762_F_BuTP29_RAL9005_FF_769b.jpg)![Thonet PLENUM FF 1391](https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_697xAUTO_fit_center-center_none/Thonet_PLENUM_FF_1391.jpg) ![Thonet AUG26 812b korr](https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_697xAUTO_fit_center-center_none/Thonet_AUG26_812b_korr_2026-10-28-083943_sftl.jpg)![Thonet PLENUM 01 small](https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_697xAUTO_fit_center-center_none/Thonet_PLENUM_01_small.jpg)![Thonet S 762 PF Bu TP29 Cento espresso RAL9005 FF 779b](https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_697xAUTO_fit_center-center_none/Thonet_S_762_PF_BuTP29_Cento_espresso_RAL9005_FF_779b.jpg)![Thonet PLENUM FF 1396](https://www.stylepark.com/assets/transformations/manufacturers/H/Hem/Produkte/Udon%20Chair,%20Black%20/%20Black%20Leather,%20Art.%20no.%2030176/_697xAUTO_fit_center-center_none/Thonet_PLENUM_FF_1396.jpg) - Request a quote - [Manufacturer's Product-Info](https://www.thonet.de/en/magazine/products/detail/plenum-smart-seat-numbering) - [Manufacturer's website](http://www.thonet.de/startseite.html) - [All products by Thonet @ Stylepark](https://www.stylepark.com/en/products/manufacturer/thonet) - [Thonet @ Stylepark](https://www.stylepark.com/en/manufacturer/thonet) Thonet Related Articles [INTERVIEWS Strong presence 4/7/2025 The internationally renowned fashion designer Jil Sander has reinterpreted Marcel Breuer's ‘S 64’ cantilever chair for Thonet. ‘Serious’ and “Nordic” are the names of the design lines with which she has given the tubular steel classic from the 1920s a new sensuality. In this interview, she tells us what was important in the process.](https://www.stylepark.com/en/news/jil-sander-thonet-s64-marcel-breuer-interview-stylepark-magazine) [FEATURED PREVIEW – MILAN DESIGN WEEK 2025 JS . THONET 4/3/2025 To mark Milan Design Week 2025, Thonet is presenting an exclusive collaboration with fashion designer Jil Sander, who is internationally renowned for her purist aesthetic.](https://www.stylepark.com/en/news/thonet-jil-sander-preview-news-milan-design-week-stylepark-magazine) [REVIEW – SALONE DEL MOBILE & MILAN DESIGN WEEK 2024 Nostalgia and drive 4/23/2024 The Salone del Mobile.Milano and Milan Design Week took place from 16 to 21 April 2024 – read our review to find out what moves the industry and the guests got to see.](https://www.stylepark.com/en/news/salone-del-mobile-milan-design-week-review-design-industry-event-stylepark-magazine) [INTERVIEWS Comfortable reference 12/13/2022 Kim Colin and Sam Hecht from Studio Industrial Facility have reinterpreted the classic bentwood chair with the S 220 collection for Thonet. The result is a material-efficient moulded wood chair with a base made of tubular steel. Sam Hecht explains the idea to us in an interview.](https://www.stylepark.com/en/news/thonet-s220-sam-hecht-kim-colin-industrial-facility-chair-collection-wood-steel-interview-stylepark) [DESIGN Thonet 2022: S 220 11/23/2022 Kim Colin and Sam Hecht from the Industrial Facility design studio have translated the formal and material heritage into the present for Thonet: "S 220" is the name of their shaped wooden chair, whose lines are inspired by the classic "214" bentwood chair.](https://www.stylepark.com/en/news/thonet-s220-designstudio-industrial-facility-chair-shaped-wood-bentwood-stylepark) [FEATURED PREVIEW – MILAN DESIGN WEEK 2022 THONET 5/18/2022 This year, the historic Circolo Filologico library in Milan will be occupied by Design Variations by Mosca Partners – part of which is the traditional company Thonet.](https://www.stylepark.com/en/news/thonet-milan-design-woche-salone-del-mobile-circolo-filologico-stylepark) [STYLEPARK RAFFLE Modern classic 1/1/2022 Stylepark is raffling off one "119" armchair from Thonet.](https://www.stylepark.com/en/news/stylepark-raffle-thonet-119) [FEATURED A table for all situations in life 6/14/2021 Werner Aisslinger has designed the robust "1140" table for Thonet that boasts a host of ingenious details. It has excellent chances of becoming something that accompanies its owner through all the various phases in life.](https://www.stylepark.com/en/news/werner-aisslinger-thonet-1140) [100 YEARS OF BAUHAUS An extremely vibrant monument 5/20/2019 200 years of design history – illustrated by 70 chairs made by a single company. Steffen Kehrle’s redesign highlights Munich’s Die Neue Sammlung’s Thonet collection.](https://www.stylepark.com/en/news/exhibition-thonet-munich) [FEATURED Bang up to date 5/14/2019 Die Neue Sammlung in Munich is updating the presentation of its Thonet collection. The presentation was conceived by Steffen Kehrle, who has in parallel designed a chair for the museum. A workshop report.](https://www.stylepark.com/en/news/thonet-design-museum-die-neue-sammlung) [FEATURED Elegant, and no frills 10/15/2015 Aesthetically speaking, the new conference room at Codic real-estate corporation calls to mind scenes from James Bond and Mad Men – thanks to the elegant Thonet furniture.](https://www.stylepark.com/en/news/thonet)