Transfer Air Device Type LDO-T LTG Aktiengesellschaft D - 70435 Stuttgart, Grenzstraße 7 +49 (0711) 82 01-0, Fax +49 (0711) 82 01-720 Internet: http://www.LTG-AG.de E-Mail: info@LTG- AG.de - LTG Incorporated 105 Corporate Drive, Suite E Spartanburg S.C., 29303 USA +1 (864) 599- 6340, Fax +1 (864) 599- 6344 Internet: http://www.LTG-INC.net E-Mail: info@LTG- INC.net -

Components for Room Air Technology Germany Central Office (Frankfurt) Sales area: PLZ 54, 55, 60, 63, 64, 66-69, 97 Sontraer Str. 27 D-60386 Frankfurt am Main (069) 94 20 19-14, Fax -10 E-mail: [email protected] Central office (Herborn) Sales area: PLZ 30, 31, 34-38, 56, 57, 61, 65 Sperberweg 16 D-35745 Herborn Herr Hartmann (02772) 570-725, Fax -727 E-mail: [email protected] Eastern office (Berlin) Sales area: PLZ 10-25, 29, 39 Eisenhutweg 51a D-12487 Berlin Herr Linke (030) 63 22 87-74, Fax -75 E-mail: [email protected] Eastern office (Chemnitz) Sales area: PLZ 01-09, 98, 99 Johannes-Ebert-Straße...

Transfer Air Device LDO-T Function The Transfer Air Device type LDO- T is an acoustically treated air transfer device for mounting into walls. LDO- T devices may be used to transfer room air to adjacent corridors, false ceilings or adjacent interior zones using either mechanical or natural ventilation systems. Transfer Air Devices reduce the pressure difference between two rooms connected by the device and thus avoid excessive door opening forces The Transfer Air Device type LDO- T prevents noise/ voice transmission to adjacent rooms. Features High transmission loss with low pressure loss Easy...

Transfer Air Device LDO-T Dimensions The element may be turned by 180_ e.g. over the door Installation situation Plasterboard on both sides, 2 x 12.5 mm 50 mm wall Plasterboard on both sides, 2 x 12.5 mm 75 mm E LTG Aktiengesellschaft ⋅ Grenzstraße 7 ⋅ D-70435 Stuttgart ⋅ +49 (0711) 8201-0 Fax -720 Internet: http://www.LTG-AG.de ⋅ E-Mail: [email protected] ⋅ Printed in Germany Former editions are invalid ⋅ Subject to technical modifications.

Transfer Air Device LDO-T Pressure loss selection diagram The sound power level in the above mentioned area is below 30 dB(A) Selection diagrams Weighted element-normalized level difference Dn,e Third-octave band centre frequency R 55 Weighted sound reduction index R [dB] Weighted element- normalized level difference [dB] Third- octave band center frequency [Hz] LDO- T 550 Limiting- insulation value of the wall during lab measurement Weighted element- normalized level difference Dn,e,w = 47 dB (measurements acc. to DIN EN 20140/10) Third- octave band centre frequency [Hz] LDO- T 550 Limiting-...

Transfer Air Device LDO-T Dimensioning Examples A Transfer Air Device LDO-T - Wall: - Door: Resulting weighted sound reduction index: Rw, res = 42 dB Resulting weighted sound reduction index: Rw, res = 41 dB Resulting weighted sound reduction index: Rw, res = 40 dB - Wall: - Door: - Door gap: Resulting weighted sound reduction index: Rw, res = 28 dB Calculation is based on the following equation: Rw, res = - 10 lg( 1 ⋅ Σ ⋅ Si ⋅ 10 −Rw,i∕10 ) S ges i=1

Specification and Schedule of Prices Transfair Air Device LDO-T Edition 24.11.2008 / page 1 Qty. Sound insulating device for the transfer of room air to hallway areas and hallway intermediate ceilings. Low pressure loss while maintaining the sound insulation features of the partition walls. For flush installation in vertical room surfaces with dry wall thicknesses of 100 mm or 125 mm. Nominal Flow Rate VNenn = 90 m3/h with a pressure loss of Δp = 20 Pa. Device comprising of : - transfer base element of 0.6 mm galvanized sheet steel with integrated sound absorber of abrasion resistant, non flammable...