Best oitc rating chart pdf. Sound Transmission Loss (dB) 36 33.
Best oitc rating chart pdf For both measures, the higher the number the better. To determine the specific STC ratings of glass and a Acoustical Guide – Determining Minimum STC Rating Methods for Determining Required Window STC Rating The three methodologies discussed below for determining the minimum required STC of windows are identical in format. Calculated by using the sound transmission loss values in the 80 to (OITC 33) HMF EXPRESS Current STC Offering (All 1 3/4" Thick Doors, up to 4080, and available in 2-3 weeks lead time) STC 42 (OITC 35) STC 46 (OITC 36) STC 46 pr. File Name: STC Ratings - Trinsic Due to continual product The TMS 302 Sound Standard provides minimum requirements for rating masonry walls for sound transmission class (STC) and outdoor-indoor transmission class (OITC) based on testing calibrated calculation procedures. 2. Pella 2024 Architectural Design Manual Division 08 Openings Windows and Doors www. 3°F/-2. This involves balancing STC ratings, availability, and budget. For more information on the STC and OITC rating of Andersen® products, please view the Performance Grade and Air Infiltrations for Andersen® Products . 0 57. 50003 659. 24 Page 1 of 7 Due to continual product research and development, details listed are subject to change at any time Impact Sound Rating (NISR) are field-measured impact insulation metrics analogous to the laboratory-measured IIC metric and are defined by ASTM Standard E10076. The sound attenuation properties of a glazing type will be achieved with the plastic interlayer Nov 25, 2022 · The difference between the sound level inside the window and the sound level outside the window, measured in decibels, is the STC rating. 3. While you may be familiar with Sound Transmission Class (STC) ratings, there is another relatively new way of measuring sound transmission: Outdoor-Indoor Transmission Class (OITC). 0°F/ 7. Enhance your savings by selecting specific windows for different sides of the house. STC ratings are available for most common assemblies as well as for windows and doors. *OITC is estimated based on this test. In general, test specimens with higher STC ratings will have better acoustical performance than those with lower ratings. It uses a specific decibel (Db) range (80 Hz to 4000 Hz) which makes it a better measure for low sound frequencies such as road noise. Best Performing Laminated Insulating Glass Zero reported seal failures for 5+ years, compared to industry average of 2% yearly failure rate. The charts include Sep 24, 2023 · Next, figure out what’ll be the best type of glass for your project. OITC and Soundproofing Windows Aug 8, 2022 · 4. Have questions about rated assemblies? All assemblies include component descriptions, STC, OITC, Rvalue, and Rainfall data (if available). The final STC/OITC rating of the window assembly will typically be reduced from the base glass acoustical rating. F-SW-2. of about 20 to a high of 55. Nov 4, 2016 · The OITC rating (referenced in ASTM E1332, Standard Classification for Determination of Outdoor/Indoor Transmission Class) is calculated from the following formula, using a logarithmic summation of individual third OB TL measurements: OITC = 100. OITC single hung; 2210 2211 2230 2230J 2270 picture window (slider frame) 2310 2311 2331 2331J 2370. The ENERGY STAR climate map below shows four climate zones for the United States. For example, if the transmitter played a sound at 60 decibels and the receiver picked up 30 decibels, the STC rating would be 30. STC measures sound insulation from 125Hz to 4kHz and is calculated by comparing measured transmission loss data to reference curves. com LS-DH-2 Lifestyle Series Double-Hung (—) = Not Available In this case, Equation 2, representing a best-fit relationship for clay masonry, must also be used. 9°C Thin Gauge Stainless Steel 34. 2 57. 751 614 -426. Each methodology -- aircraft, traffic and rail -- involves the four steps outlined in the flow chart in Figure 1. 1 4. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. The OITC (Outside-Inside Transmission Class) rating is used to classify acoustic performance of glazing in exterior applications. 2 53. (OITC 37) STC (OITC 39) STC (OITC 39) For more information visit www. File Name: STC Ratings - Trinsic Due to continual product Types of Glass Getting the right type of glass – or the right combination of types – can be critical to the success of your project. Sep 21, 2018 · The OITC rating is used to measure the sound transfer between outdoor and indoor spaces. Types of Glass Getting the right type of glass – or the right combination of types – can be critical to the success of your project. Explore noise reducing windows and doors from Pella. Actual results may vary. 26 30 26 30 33 33 34 36 37 35 32 32 36 40 43. Sound Attenuation Batt Insulation Product Data Sheet Description Acoustic Comparison of Cavity Insulation Types Sound Attenuation Batts (SAB’s) Gypsum Board Insulation Type Test Number STC are unfaced, lightweight, fl exible One layer each side. com Block the intrusion of exterior environmental noise while providing safety and security with the industry’s best OITC 47 – STC 50 automatic Accoustical Smoke Vent. * * [The data and information set forth are based on samples tested and are not guaranteed for all samples or applications. Sound Control. The OITC (Outside-Inside Transmlssion Class) rating is used to classify acoustic performance of glazing in exterior applications. This rating is based on the difference between the overall A-weighted sound level of the sound spectrum given in Table 1 and the overall A-weighted sound level of the spectrum that results from arithmetically subtracting the transmission loss or noise Today, the OITC rating System is used to assess any barrier meant to block out low frequency sound. This new version dated “-08” has been adopted by the 2009 International Building Code (IBC) and the International Residential Code (IRC). GreenFiber sales professionals will also be happy to consult with you about the best ways to utilize our insulation for sound control in any individual project. 9. Sound Transmission Class (STC) and Outdoor-Indoor Transmission Class (OITC): When tested to AAMA Specification 1801 and in accordance with ASTM E1425 and ASTM E90, the STC and OITC Rating shall not be less than: Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. Sound Transmission Class (STC) and Outdoor-Indoor Transmission Class (OITC): When tested to AAMA Specification 1801 and in accordance with ASTM E1425 and ASTM E90, the STC and OITC Rating shall not be less than: a. The final STC/OITC rating of the window assembly could vary because of the influence of the framing members and the construction of the window assembly. This data is accurate as of October 2018. NRC’s Laboratory Measurements of the Sound Insulation of Building Façade Elements3 has OITC and STC ratings for common walls,roofs and windows. Ask about ENERGY STAR Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. OVER FOUR MILLION UNITS INSTALLED highest OITC (Outdoor-Indoor Transmission Class) ratings in its class; and our industry leading sound attenuation packages offer the highest OITC ratings available on the market. Oct 16, 2023 · acoustical ratings not available for this glass combination TL23-110 X--> X 30 28 04/26/23--> X 33 28 12/12/22 TL22-247 TL22-246 acoustical ratings not available for this glass combination X X <--32 27 12/12/22 File Name: Acoustical Ratings - V150 Due to continual product research and development, details listed are subject to change at any time. An OITC rating of 40 indicates that the assembly provides a reasonable reduction in outdoor noise levels and will provide better sound isolation compared to an assembly with an OITC rating of 30. STC 5 Reduction in sound based on OITC ratings of Pella Lifestyle Series windows with respective performance package compared to a single-pane wood or vinyl window with an OITC of 19. J2247-13-303-11-R0 Insulation Included Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. Example. It is used to provide an estimate of the sound insulation performance of a facade or building elements. 45 43 49 52 53 49 48 56 48 52 49 49 53 34 36 46 49 48 46 49 51 46 49 The STC and OITC rating measures a window’s ability to block sound transmission. To determine the specific STC ratings of glass and a PDF-1. 4 %âãÏÓ 9 0 obj > endobj 11 0 obj > endobj 23 0 obj > endobj 29 0 obj >stream /Figure >BDC q 1 i . com V250-FW-1 250 Series Fixed Frame Windows Product Selection Guide 3 Lifestyle Series windows with the respective performance package are compared to a Reduction in sound based on OITC ratings of Pella Lifestyle Series windows with respective performance package compared to a single-pane wood or vinyl window with an OITC of 19. 24 Page 1 of 2 Due to continual product research and development, details listed are subject to change at any time OITC (Outdoor-Indoor Transmission Class) measures outdoor-to-indoor sounds, like traffic, airplane noise, and construction. The document provides acoustic performance data tables for insulating glass, triple insulating glass, monolithic glass, and laminated glass constructions. STC ratings accurately reflect the performance of windows installed on the inside of buildings, whereas OITC ratings more accurately reflect the performance of windows installed on the outside. 14 − 10log 10 å f 10((L f-TL f +A f) / 10) Where: Jan 23, 2025 · Single Number Rating: The higher the OITC number, the better the sound isolation is. Ultra™ Series Performance Ratings Updated: 7/2020 size bs/vs bs/vs bs/vs Half Vent 6060 -310-3265 LC-PG-30 0. The frequency range used is typical of outdoor traffi c noises. Air Space Secondary Window Glazing (Storm Window) STC Rating Range OITC Rating Range 1/8” annealed (DSB) + 1/8” annealed (DSB) 1/2” None 27-28 23-24 STC 28 / OITC 20 R-10 Faced 202-96 Insulation Over the Girts STC 21 / OITC 17 No Insulation STC 29 / OITC 20 R-13 Faced 202-96 Insulation Over the Girts Assemblies tested in accordance with ASTM E 90. 6 54. MTC was developed to address shortcomings of STC and RW at low frequencies important for The Delta IIC rating is the performance gain between the first and second test. Industry standard is STC 26 for single hung windows. This section defines the various kinds of glass, how they’re made, and their strengths The Delta IIC rating is the performance gain between the first and second test. ] includes both STC and OITC ratings for steel and wood stud walls, considering both interior and exterior assemblies. Impervia ® Sliding Windows (1) See Design Data pages in this section for specific product performance class and grade values. OITC ratings determined in accordance with ASTM E 1332. SIZE MODE FAN DB RATING1 07 FAN ONLY LOW HIGH 50. The OITC rating system is mostly consulted when there are low-frequency sounds involved between 80 to 100 decibels that can't be calculated by the STC rating. While OITC is often a slightly more appropriate way to evaluate windows, it isn’t nearly as recognized as STC, nor has it In this case, Equation 2, representing a best-fit relationship for clay masonry, must also be used. On the other hand, double glazing is readily available. 9 09 FAN ONLY LOW HIGH 50. These Jan 18, 2022 · OITC Test Date Test Number Intercept or Cardinal horizontal slider 6110 6111 6130 6130J 6170 size tested 6040---Operating Style Series Numbers Glass 1 Glass 2 Spacer STC File Name: STC Ratings - Style Line | V250 Due to continual product research and development, details listed are subject to change at any time. com V250-SW-1 250 Series Sliding Window Product Selection Guide Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. To determine a single OITC for the wall system, first calculate the OITC using both Equations 1 and 2, using the combined weight of both wythes, then linearly interpolate between the two resulting OITC ratings based on the relative weights of the between OITC and STC? OITC (Outside Inside Transmission Class) A single-number rating calculated in accordance with ASTM E 1332, using values of outdoor-indoor transmission loss. Nov 24, 2022 · Intertek – one of the largest industrial testing companies in the world – tests windows in its facilities for both STC and OITC ratings. 08/31/2023 new rating to describe products that comply to the standard. F-FW-2. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. Save as PDF 800 Park Drive , Owatonna , MN 55060 US | (800) 533-2080 The updated TMS 302 Sound Standard provides minimum requirements for rating masonry walls for sound transmission class (STC) and outdoor-indoor transmission class (OITC) based on calculation. G. Lepage offers a variety of acoustic glass with high ratings. The STC rating PDF-1. 1 COOLING LOW HIGH 57. Th ose ranges, along with the glazing to achieve them, are as follows: I. S. J2247-13-303-11-R0 Insulation Included [ss] [ss] [ss] [ss] wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi-wpi- STC OITC Test Date Test Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Trinsic I V300 updated 04. What Is an OITC These ratings are all single numbers used for comparison of various assemblies. STC 43 Assembly Components Finish material 5/8” Gypsum Size 2 1/2” Steel Stud Spacing 16” oc Product AFB Thickness 1. 1. Sound Transmission Loss (dB) 36 33. Similar to STC ratings, OITC ratings provide information on how well a barrier blocks sound, and should be taken into consideration as you shop for soundproofing advantage, including details on wall assemblies and their STC/OITC ratings. 0 Oct 10, 2024 · OITC is a very new rating in the world of acoustics and not all products carry an OITC rating, as they may predate that testing being more commonplace. Trifab ® 601/601T/601UT – 37 (STC) and 31 (OITC) 1. The same process is used to determine STC ratings for doors. V250-DH-2. That’s why we’ve collaborated with the world’s top IG equipment manufacturers to provide solutions for nearly every challenge. How the OITC Rating is Measured Like the STC rating System, OITC measures sound intensity Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. OITC testing An STC rating of 50 (which is not a typical rating for any window) would block as much as 95% of external noise. 24 Page 1 of 7 Due to continual product research and development, details listed are subject to change at any time rating. This information is located beneath the thumbnail image of the assembly. ENERGY STAR® Options Oct 28, 2024 · Quanex’s Super Spacer® Standard, featuring polymer EPDM (Ethylene-propylene-diene-monomer) construction, dependably delivers high performance for insulating glass (IG) units, including excellent resistance to ozone, weathering, water and aging, while maintaining its flexibility through wide changes in temperature and barometric pressure. • OITC 47 – STC 50 • ISO 140-18 Rainfall Sound Rating 36. STC OITC Test Date Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Tuscany I V400 updated 09. Today, the OITC rating System is used to assess any barrier meant to block out low frequency sound. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. The U. It is used to specify the sound transmission loss properties of exterior includes both STC and OITC ratings for steel and wood stud walls, considering both interior and exterior assemblies. Pella. Class (or OITC) is a relatively. RW is similar but covers 100Hz to 3. J2247-13-303-11-R0 Insulation Included Jan 28, 2025 · As with STC, the higher the OITC number, the better the window or patio door unit keeps out unwanted noise. ucts, there are typical ranges of STC & OITC ratings based on the glazing make-up. Measured on a numerical scale, a higher number means less exterior noise inside your home. OITC rating (frequency range - 80 to 4000 hertz) The OITC rating (1990) provides a standardized way to compare products such as windows and doors made by competing manufacturers. Typically it has been said that highway noise is OITC 20-27, downtown congestion and trains generally are 27-35, and aircraft is OITC 35 and higher depending on nearness to the airport. The Delta IIC rating is the best sound rating to consider when comparing the performance of different types of underlayment over full pour concrete (4" or thicker). 22. 17. Class (OITC) 70 SERIES SS 27 23 DS 28 22 3mm/4mm 33 26 Laminated DS-DS/060/DS 35 30 SS 27 23 American Craftsman® Product Performance Sound Transmission Ratings. frequencies used in STC ratings correlate in a general way with subjective impressions of sound transmissions for speech, radio, and television. com. Performance Grade ratings are being used to replace Design Pressure Ratings as the preferred 9. Although very similar, the OITC rating system is aimed at lower frequencies, such as construction work, rumbling engines, low-flying planes, and car horns, and it utilizes a wider frequency Quanex offers efficient insulating glass (IG) production line layouts to best suit your business. 3°F/2. Two common ratings for windows and doors are the Sound Transmission Class (STC) and Outdoor-Indoor Transmission Class (OITC) Ratings. The second column is the rating of the operable door best. 250 Series Double-Hung. Thermal Conductivity Chart Super Spacer 42. It includes the Sound Transmission Class (STC) rating and Outside-Inside Transmission Class (OITC) rating, as well as sound transmission loss data across a range of frequencies, for various glass makeups and thicknesses. 06 m W* n 0 792 612 Windows and doors can help block outside noises whether you live in the city or on a farm. STC rating determined in accordance with ASTM E 413. According to Miller, the OITC rating is becoming especially popular for windows in urban areas. It is best to use specific sound transmission loss values, in conjunction with actual spectra of outdoor and indoor sound levels, for making final selections of facade elements. The frequency content of many common exterior sounds closely resembles that used for the OITC rating. For a glazing installed on a building envelope, the Outdoor-Indoor Transmission Class (OITC) rating describes its approximate decibel level reduction of sounds such as those of roadway and rail traffic, and of nearby aircraft takeoffs. For example, acoustic glass will have the highest STC rating but can be very expensive and challenging to source. Outdoor-Indoor Transmission . 8°C average sightline temperature difference *test notes can be found on the bottom of the next page 28. 5 fi berglass insulation batts, ⁄8" None TL-92-618 38 5 designed to deliver noise control ⁄8" Glass fi ber TL-93-325 49 5 in metal stud wall Pella 2024 Architectural Design Manual Division 08 – Openings Windows and Doors www. Please see the reverse side for a comparison of how our cellulose and 4-inch Sound Control Batts perform in Professionals use the OITC rating System less frequently than the STC rating System. hmfexpress. TESTING Windows and doors put to the test. Introducing the INDUSTRY’S BEST OITC & Rainfall Ratings babcockdavis. AIIC replaced the previous Field Impact Insulation Class (FIIC) rating. The first column is the rating of the door panel only; tested in a static inoperable condition to determine the sound transmission through the door. To determine a single OITC for the wall system, first calculate the OITC using both Equations 1 and 2, using the combined weight of both wythes, then linearly interpolate between the two resulting OITC ratings based on the relative weights of the May 6, 2020 · Outside-Inside Transmission Class Rating used to classify acoustic performance of glazing in exterior applications. This section defines the various kinds of glass, how they’re made, and their strengths The document discusses methods for calculating various acoustic ratings including STC, RW, MTC, and OITC. GENERIC STC and OITC RATINGS Not to be used for design or specification purposes Glass Product Type and Thickness STC Rating OITC Rating Monolithic 3/ 32 ” 26 - 1/ 8 ” 29 - ¼” 31 29 ½” 36 33 Sealed Insulating Glass Units 1/ 8 ” glass + ¼” air + 1/ 8 ” glass 28 26 ¼” glass + ½” air + ¼” glass 35 28 3 Reduction in sound based on OITC ratings of Pella Lifestyle Series windows with respective performance package compared to a single-pane wood or vinyl window with an OITC of 19. Determine U-Factor and SHGC ENERGY STAR standards based on your climate zone. com or call us to learn more about our sound rated openings. Acoustical Guide – Determining Minimum STC Rating Figure 1. 7 dB North America, a rating system was introduced in 1970 under ASTM E 413 “Classification for Rating Sound Insulation. When choosing building envelope designs, designing using the OITC rating The OITC is the preferred method of comparison of façade elements including roofs for blockage of exterior sounds. When that is the case, the OITC correlates well with the noise reduction achieved. 1 This classification provides a single number rating for transmission loss or noise reduction data that have been measured or calculated. It is called the outdoor-indoor transmission class (OITC). 4°C Thermally Broken Aluminum Super Spacer® Selection Chart The STC (Sound Transmission Class) is a rating system for interior building partitions and viewing windows used to categorize acoustic performance. 5 2 01 4 6 Double Vent 12060 48 S2009-553 HS-LC-25 0. The OITC (Outdoor Indoor Transmission Class) rating was created to test exterior walls and their elements (windows and doors). 501 re 306 396. Oldcastle Glass has acknowledged OITC by providing charts which indicate the STC and OITC ratings of various glass assembly configurations. Shielding a building’s environment from increasing noise levels, especially near airports and busy highways, is a critical factor in the specification of glazing materials for both new and renovated structures. All assemblies include component descriptions, STC, OITC, and R-values (if available). "Sound Transmission Class (STC)" and "Outdoor/Indoor Transmission Class (OITC)" ratings are for individual units based on independent tests and represent entire unit. Glazing I. ” This rating system is the Sound Transmission Class, or STC classification system. and calculated in accordance with ASTM E1332 (1990). 75 5 0 1 4 12 12 0 6 0 48 Reduction in sound based on OITC ratings of Pella Lifestyle Series windows with respective performance package compared to a single-pane wood or vinyl window with an OITC of 19. Because of the larger range in expected sound, OITC values are determined for lower frequencies as well, in the range of 80 to 4000 hertz. Significant Sound Reduction Significantly reduces exterior sounds in your home with an STC rating of 30–35 depending on the product. The STC rating has been in existence for many years and is based on speech sounds. As with STC ratings, the higher the OITC number, the more sound resistant the product is. 8 12 FAN ONLY LOW HIGH 51. com DH-IR-1 Pella ® Reserve™ Impact-Resistant Hung Window Product Selection Guide The chart below indicates the STC rating of specially made acoustic doors using various applications of gasketing. If sound reduction is a priority, look for a window in the 30-35 STC range. . 03. 1 includes both STC and OITC ratings for steel and wood stud walls, considering both interior and exterior assemblies. Department of Housing and Urban Development (HUD) provides information on housing policies, programs, and resources. See table above for more information. For example, if your neighbor has a sub woofer-equipped sound System, you may want to consider OITC ratings for all of your barriers, interior and exterior. 15kHz and is used in Europe. 5” Acoustics Assembly Number: ISS-00 STC: 43 OITC: 28 Report No. In addition, each assembly references a ROCKWOOL test number, as well as the ROCKWOOL products included in the tested assembly. Glass size and glazing system will a ect STC rating. Fax: (910) 452-1848 Outdoor to Indoor Sound Transmission Class (OITC) The OITC rating is typically applied to façades (exterior walls) and façade elements (windows and doors) exposed to transportation noises. 02 3. may vary. new way of measuring sound transmission, an OITC rating is To start, the higher the OITC rating, the less sound will travel through the window. Block Frame Jan 11, 2025 · OITC: This is a much newer rating system developed specifically to measure the extent to which an exterior wall insulates against outdoor noises in the low- to midfrequency ranges: heavy traffic, airplanes, trains, etc. The OITC rating is thus more applicable to garage doors than the STC rating. “In places like New York City, it’s all OITC,” he says. 0 COOLING LOW HIGH 57. For all of these acoustic ratings, the greater the rating, the better is its resistance to sound transmission. com 888-412-3726 info@babcockdavis. This occurs for most road • National Fenestration Rating Council® (NFRC) • Texas Department of Insurance • STC (Sound Transmission Class) • OITC (Outdoor-Indoor Transmission Class) See the Glossary of Terms for more details on each of these certifications and testing protocols. OITC. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000. Impervia ® Fixed Windows. 7°C ® Super Spacer® TriSeal™ +14. Calculated by using the sound transmission loss values in the 80 to 4000 Hz range as measured in accordance with ASTM E-90(09). been introduced. AIIC / ISR / NISR values are typically 5 points or more lower than IIC ratings for the same assembly. A typical dual-pane window has an STC rating of 25-30. 3°F/5. Actual results glass selection. Rev. (OITC 37) STC 46 pr. 5 SUBMITTALS STC OITC Test Date Test Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Ultra I C650 updated 04. Performance documents for altitude limits, NFRC ratings, center of glass, joining window load table, air infiltration, and more. Outdoor-Indoor Transmission Class (OITC) Recently, a new single-number rating has . they let pass through. 5°F/1. A higher number shows better performance. Use OITC when considering intrusion of noise into a building from roads,trains or aircraft. In addition, Each assembly references an RWT (ROCKWOOL test) number. Consider window orientation. 1°C Aluminum 37. The higher the STC value, the better the wall assembly is at reducing sound. From throughput requirements to space and manpower limitations, we know your business is unique. For example, if your neighbor has a subwoofer-equipped sound System, you may want to consider OITC ratings for all of your barriers, interior and exterior. 4. The STC rating quantifies interior sound transmission while the OITC rating is recommended for exterior glass selection. Feb 22, 2024 · However, even with OITC being the newer creation, the STC rating system is still the preferred rating method among professionals in soundproofing. pkx yrnpv ecgg lyc kijljaj okquuku pyb lhprz ooa daki fyrtv krsu uegc ykxe ilvjdu