[ Overview ](/products/windows/conceptsystem-77/hidden-vent) [ Technical information ](/products/windows/conceptsystem-77/hidden-vent/technical-info) [ Downloads ](/products/windows/conceptsystem-77/hidden-vent/downloads) Open tab menu *ConceptSystem 77*# Hidden Vent ![CS 77 Hidden Vent](/sites/default/files/public/styles/product_header/public/inriver/images/104850_Private%20House%20Meise%203_42.jpg?h=3fa9d8f0&itok=mSH2y-Dk) ![Paralline Mid](/sites/default/files/public/styles/product_header_lifestyle/public/inriver/lifestyle_image/117114_reynaers_6.jpg?h=d73728dc&itok=Tfepf5yJ) ConceptSystem 77 is a trusted aluminium window solution that has been fully optimised to match all your project needs. Hidden Vent is an opening element that looks like a fixed element from the outside, creating a clean and uniform look. ###### Need help? Search and compare products [ Get started ](/products-0?f%5B0%5D=product_group%3A493&f%5B1%5D=variant_type_variants%3A9849&f%5B2%5D=variant_type_variants%3A9850&f%5B3%5D=variant_type_variants%3A9855&s=CS%2077%20Hidden%20Vent "Get started") - ![Subtly hidden vent system creating continuous façades](https://www.reynaers.africa/sites/default/files/public/inriver/icons/116846_Design.svg) Subtly hidden vent system creating continuous façades - ![Well-balanced price-performance-features mix](https://www.reynaers.africa/sites/default/files/public/inriver/icons/116840_Economics.svg) Well-balanced price-performance-features mix - ![Reliable windows that last a lifetime](https://www.reynaers.africa/sites/default/files/public/inriver/icons/116841_Performance.svg) Reliable windows that last a lifetime ## Technical details ### Thermal Insulation - **High** - Uf = 2.1 W/m²K ### Air-Water-Wind - **High** ### Acoustics - **High** - Rw(C;Ctr) = 46(-1;-4) dB - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133168_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0006.png?itok=sLLkg3Vk) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133176_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0007.png?itok=QMSNhSIZ) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133174_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0008.png?itok=33hXKXd7) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/images/133169_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0009.png?itok=J569HZDn) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133178_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0010.png?itok=PCa9bnnt) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133179_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0011.png?itok=9YTgs4zo) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133180_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0012.png?itok=NfSc0kV7) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133181_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0013.png?itok=GeT4EZ-M) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133182_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0014.png?itok=buhPK3g7) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133183_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0015.png?itok=vMpvoSOQ) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133184_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0016.png?itok=sYSeER15) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133185_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0017.png?itok=FQQIjrX_) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133186_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0018.png?itok=4H2evSbI) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133187_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0019.png?itok=ew_YiAc6) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133188_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0020.png?itok=vjJaT34n) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133189_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0021.png?itok=6_0tpS4f) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133190_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0022.png?itok=5vXM9DTX) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133191_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0023.png?itok=jZ8PaO6W) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133192_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0024.png?itok=647wpRP1) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133193_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0025.png?itok=NS6owvki) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133194_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0026.png?itok=K4kg4cwJ) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133195_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0027.png?itok=nXXr2Ytn) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133196_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0028.png?itok=qqzrtaUr) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133197_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0029.png?itok=pvQza5kV) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133198_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0030.png?itok=NfPKYdgg) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133199_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0031.png?itok=fZf8zigl) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133200_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0032.png?itok=_z7ixvBt) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133201_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0033.png?itok=y66sIXlb) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133202_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0034.png?itok=8NxRt259) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133203_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0035.png?itok=zZIZFKXE) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133204_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0036.png?itok=decJBw6R) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133205_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0037.png?itok=vkU7H6xl) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133206_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0038.png?itok=tjilBY9K) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133207_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0039.png?itok=IVVABZHf) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133208_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0040.png?itok=Yd5yOAcy) - ![CS 77 Hidden Vent](/sites/default/files/public/styles/360_degree/public/inriver/360_degrees/133209_INVA-309300_CS_77_-_WINDOW_HIDDEN_VENT_corr2_Final_Render_0041.png?itok=4BZ1mv12) ### Height Vent - Min 550 mm - Max 2400 mm ### Frame-Vent Width Open In - Min 76 mm 360° [ Full specifications ](https://www.reynaers.africa/products/windows/conceptsystem-77/hidden-vent/technical-info) ## Product options Personalise ConceptSystem 77 Hidden Vent with the following options ![Concealed Hinges](https://www.reynaers.africa/sites/default/files/public/inriver/icons/116964_Concealed%20Hinges.svg)### Concealed Hinges The details are the design, concealed hinges are the finishing touch ![Concealed Drainage](https://www.reynaers.africa/sites/default/files/public/inriver/icons/116963_Concealed%20Drainage.svg)### Concealed Drainage No more plastic cover caps, enjoy those clean lines ![Flyscreen](https://www.reynaers.africa/sites/default/files/public/inriver/icons/116983_Flyscreen.svg)### Flyscreen Enjoy cool summer evenings, without losing sleep ![Balustrade](https://www.reynaers.africa/sites/default/files/public/inriver/icons/116979_Balustrade.svg)### Balustrade Safety can equal beauty ![Motorised](https://www.reynaers.africa/sites/default/files/public/inriver/icons/116982_Motorised.svg)### Motorised Comfortable to use, even remotely ![Glass Corner](https://www.reynaers.africa/sites/default/files/public/inriver/icons/116978_Glass%20Corner.svg)### Glass Corner Glass to glass connection without profiles obstructing the view The available options depend on profile and configuration choices. Please contact your Reynaers Aluminium representative. ![DigiTrace step 4](/sites/default/files/public/styles/cta_block_left/public/2023-12/Reynaers%20Aluminium-DigiTrace_35.jpg?h=b5e777bf&itok=gD2ORvzx) Effortless access to your element’s digital product passport ## DigiTrace A unique element identifier provides you with a wealth of information in a matter of seconds, eliminating the need for any manual search. A quick scan allows immediate access to all system and technical details specific to your element as well as to documentation, certificates and contact details of your fabricator. [ Discover more about DigiTrace ](/digitrace "Discover more about DigiTrace") ![DigiTrace](/sites/default/files/public/styles/cta_block_right/public/2023-12/Reynaers%20Aluminium-DigiTrace_38.jpg?h=b193cbc8&itok=brhyrck7) Effortless access to your element’s digital product passport