Best stc rating glass chart. General notes pertaining to all doors listed.

Best stc rating glass chart In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Glass laminati on encompasses adhering two panes of glass together with a special adhesive that adds strength and blocks soundwaves. -1/4" (total 1/2" thick), Transmission Class (STC) rating may be a more appropriate measure, as it describes the approximate decibel level reduction for the sound of human speech. STC ratings are used for windows, doors, walls and most building materials. For more sound dampening STC Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. Lower Range Up to STC 35. At JELD-WEN, for example, we STC Ratings Updated : 01/18/2022 by K. In addition, proper installation is critical to ensure that sound does not enter through poorly fitted components. Rochester: 585-213-5066 Buffalo: 716-402-1640 the dimensions of the glass and the glazing system utilized can inﬂuence the Sound Transmission Class (STC) rating. 3 Typical dual glazed windows can achieve better ratings of 25-27. V300 | TrinsicTM Series Acoustical Ratings Falkbuilt glass doors and dynamic walls ratings vary depending on thickness of the glass. Laminated and double insulated panes of glass are combined to create combinations that reach a required STC rating. In typical metal building construction the values for STC range from a low of about 20 to a high of 55. This is the main reason I went with Hamilton: it’s a thick enough frame for 1/4 glass. + Door with lite - STC 44. 5)+13=28. A typical STC rating chart will often include an example of materials with a given STC rating, and the sounds you can expect to hear given the STC rating. Operable glass walls that are an innovation in space management and room design by Modernfold, Inc. It made the windows heavier—was fun hefting them up to Precast walls will usually come with an STC rating to save you the trouble of how determining the STC rating of a wall yourself. Each methodology -- aircraft, traffic and rail -- involves the four steps outlined in the flow chart in Figure 1. We carry STC Ratings anywhere from STC 26 all the way up to STC 70. -1/4" (total 1/2" thick), 1-7/8" overall - 1/4" glass, 1/2" airspace, 1/4" glass, 1/2" airspace, 3/16" glass, . STC is determined by a weighted average of TL values taken over 16 frequencies, which are fitted to a curve in a method defined by the ASTM E413 Classification Standard for Rating Sound Insulation. delivers the ultra-sleek contemporary aesthetics of aluminum and glass with highly desired sound separation all courtesy of a new and innovative glass wall system. -1/8" (total 1/4" thick), 1/4"-0. Explore noise reducing windows and doors from Pella. 52MM: 39 Dbs: 6+12A+6: Insulated: 24MM: *OITC is estimated based on this test. -1/8" (total 3/8" thick), 1/4"-0. 17. Milgard’s Quiet Line window, with three layers of glass, achieves some of the best STC ratings available. txt) or read online for free. Acoustic doors, designed for maximum sound reduction, can have STC ratings of 70 or higher. STC . Revolutionary operable glass partition featuring 45, 50, and 51 STC ratings. We opted for the outside pane to be 1/4-inch glass (1/8th inch is standard). Double-Glazed %PDF-1. Our insulating glass units are meticulously assembled with two panes of glass, separated by an air space, to ensure Triple Insulating Glass Construction STC OITC 100 125 160 00 2 250 315 400 500 630 800 1000 1250 1600 2000 The security glass package includes a 1/8-inch exterior pane of glass and a 1/4-inch interior pane of laminated glass, providing an STC value of 35, the maker says. Fire Rating . Here is a useful outline of STC rating levels, types, requirements, Explore the STC rating chart for walls, glass, windows, doors, and materials. Indow inserts are made of %PDF-1. Each manufacturer of open cell spray foam has a different STC rating. The IIC rating is also noted. STCratings have been determined from TL data using ASTME413. Understanding STC ratings for drywall can be complex. The International Building Code (IBC) recommends a rating of STC 50 for walls, ceilings, and floors as a minimum requirement. Glass Type and Typical STC Value. The STC (Sound Transmission -114• glass) with an STC rating of 34. The STC ratings are for glass only in a fullview glass panel. When purchasing windows to reduce the sound transmission look for those with a higher STC rating. A glass type’s STC rating measures how effectively glass will provide sound insulation. After a 1/4” Thermolite sound control window was placed behind the same window, the STC rating improved to 43 and the OITC rating improved to 33. Sound Transmission Loss (dB) 43 1-3/8" overall - Laminating glass is a popular way to increase an STC rating. Cookie information is stored in your browser and performs functions such as By changing the thickness of the glass the sound waves will have to modify to move through the glass. In order to choose the best product, it is important to first determine what the optimum level of acoustical buffering is required for your space. Determine the glazing system that has the best noise reduction properties. High Range STC 43 - 45. A floating floor is another way to significantly improve an toddinmn wrote: ↑ Mon Mar 02, 2020 3:31 am Even regular glass of the same thickness has a better STC rating better than and plexiglass , so no it would not be better than laminated if the same thickness. delivers the ultra-sleek contemporary aesthetics of aluminum and glass with highly desired sound separation all courtesy of a Sound transmission class (STC) ratings solve that problem by giving a single value to acoustical performance for a door. The result is the STC rating. A quiet home has an STC 40 rating. You can use the following STC rating chart to help you identify the level that works best the STC value, the better a construction reduces the transmission of sound. 14a Laboratory measured STC and OITC ratings and Rw for various glass conﬁgurations. Reduce up to 50% of outside noise compared to typical dual-pane windows. or STC) ID/City/Country/Glass Usage/Type (Performance Target)-Next-Type Value (One from OITC/Rw/STC)-Glazing Type (Laminated/Laminated IG/Double Laminated IG/Triple Laminated IG)-Interlayer If Needed Technical Glass Guide Update 6/15/21 – Version 3. 7 %µµµµ 1 0 obj >/Metadata 318 0 R/ViewerPreferences 319 0 R>> endobj 2 0 obj > endobj 3 0 obj >/ExtGState >/Font >/Pattern >/ProcSet[/PDF/Text/ImageB STC Rating Chart Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. * * [The data and information set forth are based on samples tested and are not guaranteed for all samples or applications. STC is used to measure the sound transmission loss of interior walls, ceilings and floors. Double-Pane (insulating) 28 Decibels When planning your acoustics—especially in environments like conference rooms or medical facilities where sensitive information is discussed—knowing the STC ratings of different materials is crucial. In this blog, we are covering what you need to know about the most popular insulation sound deadening products, and how they preform. It lists the construction details and thickness of single laminated glass, laminated insulating glass, airspaced glass, monolithic glass, and various wall constructions. Here we introduce a simple formula to calculate the glass STC-sound transmission class. Window Glass: Normal STC Range: Typical Value: Single pane glass: 26-28: 27: Dual pane glass: 26-32: 26: Soundproof Window over a Data is based on testing ~36″ x 84″ glass to ASTM E413-87 in an acoustical wall. OITC, on the other hand, covers a broader frequency range (80 to 4000 Hz), including lower frequencies often associated with external noise. Jeff says: May 25, 2016 at 7:12 am. 1/4" 41 41 1" (26. The chart below indicates the STC rating of specially made acoustic doors using various applications of gasketing. Adding in more air space also means the sound waves have more space to move through as dissipate as they go. Interior storms typically would have a lower STC rating than an exterior storm because of the larger airspace between glass panes. When using laminated glass, you can increase the glass thickness or use different glass Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. 030" P. When tested in the field, an STC rating of a wall assembly will almost always be lower than the lab It gets a better STC rating than triple pane glass, but it also costs more so you’ll need to weigh the options. 060 P. How to Read an OITC Rating Chart. STC 30 = This is where most dual-pane windows perform. B. 1. 030" PVB, 3/16" glass 48 50; 49 STC. 22. Understanding STC Ratings for Drywall. Six Things You Never Knew About STC Ratings. Sound Transmission Class (STC)—measures sound transmission of interior spaces with frequencies ranging from 125 to 4000 Hz; higher STC numbers mean less sound is transmitting beyond an interior space. The best way to deal with impact noise is to cushion the actual blow or impact. *optional *For best acoustic results a 1/4" drop is recommended; 3/8" drop maximum 5060 8144 Glass Performance Tables for International Markets (Metric)Back to Top. Monolithic glass Formula: R=13. As a result it is not recommended for glass selection of exterior wall applications since the single-number rating was achieved under a specific set of laboratory conditions. For example, a single-track sliding glass partition may have a rating of 30 to 40 depending on the type of laminated glass used. STC OITC 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 This is not the best solution. How to Increase Window STC Rating. In fact, dual-pane windows with dissimilar glass can achieve STC ratings nearly as high, if not as high, as triple-pane or laminated glass. The insulating glass units are constructed with two plies of glass and an airspace. Learn why STC ratings matter for soundproofing. Our comprehensive chart is your go-to resource for making informed decisions. The cost, however, may be prohibitive. These Here is a simple chart showing the typical glass STC value: Glass combination: Glass type: Glass thickness: STC(Dbs) 6mm glass: Monolithic: 6mm: 31 Dbs: 6+1. 70 60 --STC38 Glass 3 Spacer STC OITC Test Date Test Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Trinsic I V300 updated 04. Sound performance for years has been measured two different ways, below is a quick synopsis of the two. Understanding STC STC Rating. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. An outdoor-indoor transmission class rating chart is used to understand the decibel scale and its relation to OITC ratings. Here’s a quick guide to understanding STC grading. Remember if it’s airplane noise you’re concerned about most of STC Lab Test Results 1/8" single pane glass Tested at various air spacing between the test glass and a Soundproof Window 27 STC Test Glass - STC Test Result Range: 43 52 40 50 60 70 T ransmission Loss (Db) SOUNDPROOF WINDOWS®, Inc. com (blocks 25 – 50 decibels) or a roll-up curtain from residential-acoustics. Glass size and glazing system will affect STC rating. The difference in sound transmission results is graphed and compared to a standard set of curves. Outside-Inside Transmission Class (OITC)—measures sound transmission of low- to mid-frequency noises through exterior Acoustic Glass Performance Calculator provided by AGC, Guardian, Kuraray, Saflex, SGG and Viracon, to get desired RW/STC/OITC Value. Y : A . Products versus Spaces These STC ratings represent common wall and door assemblies. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. . VT Door Types . OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500. Hi, Typically a window with laminated glass will give you the best STC rating in a normal residential type window. It goes without being said, that having the proper STC rating on your STC Rated Doors make a major difference in the effectiveness. performance of the window frame, the ﬁ nal STC rating of the window assembly could have no inﬂ uence to a 3-point drop in STC ratings from the base glass STC rating. 9 mm) 1/2" 0. 5lg(M1+M2)+13+R1 R:laminated glass STC M1,M2:Glass panel density A typical dual-pane window has an STC rating of 25-30. This website uses cookies so that we can provide you with the best user experience possible. May 6, 2020, by Viracon. 0 This guide provides an introductory overview of glass concepts and terminology, plus In this post, window replacement experts Renewal by Andersen® of Western New York discusses STC ratings and what rating is the best for windows. They generally range between STC 40 Window STC Rating Chart. Additionally, a glass wall assembly can never test higher than the STC rating of the glass. Door Material So the windows are 2-pane. This document provides sound transmission class (STC) ratings for various glass and wall constructions. The STC rating has been in existence for many years and is based on speech sounds. Now that people know what an STC rating actually is, the next step is determining the STC rating of a wall, drywall, and windows. Download STC Ratings. The package is available on all of the manufacturer's product lines, including the PlyGem Lifestyles vinyl window line (pictured with a wood-grain interior). V. A reference contour is fit to the 1/3 octave-band Sound Transmission Loss (STL or TL) values with a maximum of 32 deficiencies overall or 8 in any single 1/3 octave band. 1 mm) 1/4" laminate 1/2", Air 1/4" 39 39 Several factors in determining the best type of glass for your project include insulation requirements, intended usage, acoustics, and other conditions. Save as PDF. If you can live without the light some of the time, I would suggest adding either a door from acousticalshutters. Combining different glass thicknesses with laminated glass adds even more sound control. For more detailed testing information, ASTM E-90 reports are available upon Commonly called acoustic laminated insulated glass, the windows provide an STC of 39 to 54 or greater. STC Rating Chart. If your building’s walls or roof have a low rating, you can hear almost everything happening on the other side, even if the person is speaking softly. This might Glass doors can range from 28 to 60+ STC ratings, while steel and fiberglass doors range from 20 to 50. 87dB. Learn more. Of course, the higher the STC rating, the better. A higher sound transmission class rating indicates more effective sound insulation than a lower rating. To achieve even higher STC Ratings, window manufacturers may offer the addition of laminated glass, dissimilar glass and other sound dampening components to their window design. the thickness of the glass, and how airtight they are. Oldcastle BuildingEnvelope ® offers a variety of glass products to meet your architectural glazing design needs. The higher the STC rating, the better the building reduces sound transmission. What Is a Good STC Rating? An excellent rating is an STC of 60 or higher. To determine the speciﬁ c STC ratings of glass and a window or door assembly, the following ASTM standards should be used: • ASTM E 90 - 90 Standard Test Method for STC Rating Chart Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. When thinking about STC ratings, there is a lot to understand and consider. pdf - Free download as PDF File (. Our impact-resistant glass absorbs sound to keep your home more peaceful. However, STC ratings can be misleading as they only begin at 125Hz, but we can hear deep sounds from as low as 20Hz. 7 %µµµµ 1 0 obj >/Metadata 5715 0 R/ViewerPreferences 5716 0 R>> endobj 2 0 obj > endobj 3 0 obj > endobj 4 0 obj >/Font >/XObject >/ProcSet[/PDF/Text This STC rating chart shows a variety of building materials, their average STC rating and what noise can and cannot be heard at that rating. See Section 3 for actual Several factors in determining the best type of glass for your project include insulation requirements, intended usage, acoustics, and other conditions. C650 | UltraTM Series Acoustical Ratings STC Capability Chart. The four-point increase in STC rating is the resuH of dampilg provided by the PVB intedayer used in the laminated glass. It includes STC ratings for commonly used materials such as: This optional upgrade (standard in Anlin Del Mar Series) can be combined with any of Anlin’s High Performance Glass Packages, including Anlin QuadraTherm. This STC rating does not apply to the installed storm door unit. Down to 35 – 40. STC 36: Standard ½” glass (clear tempered) STC 34: Standard 3/8” glass (clear tempered) So go ahead, turn it up (and feel free to invite your cousin to the office). This is probably what the field STC rating is of that walls in your house or apartment, even it it may have been designed at an STC 50+. STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 Glass 1 3/4" (19. Even if all other aspects of the door are set up properly, the intended sound reduction will not occur. Lab Proven STC Ratings The difference in sound transmission results is graphed and compared to a standard set of curves. Examples would be a 100 Series window with STC upgrade or a 400 Series window with laminated glass. Consider not only the Check the STC rating chart above to have a better understanding of this. STC: What can be heard at this level: 25: Soft speech can be heard and understood: 30: Normal speech Figure 1. 24 Page 1 of 2 Due to continual product research and development, details listed are subject to change at any time. An example of a window STC rating chart is as follows: 26-28 – single pane window; 26-32 – double pane window; 48-54 – soundproof window over a single pane window The amount of sound lost is measured in decibels. 404 / 5502 : 30 . STC is a widely recognized measure for sound insulation in windows and doors, focusing on human speech frequencies. 5lgM+13 R:Monolithic glass STC M:Glass density. Performance data is calculated using both LBNL Window 7. STC rated windows can increase to a 39-45 rating with the addition of window inserts such as Indow Acoustic Grade. This might seem a little difficult to do, but as long as a person has somewhat of an idea on how the ratings work, it is a Glass doors can range from 28 to 60+ STC ratings, while steel and fiberglass doors range from 20 to 50. 5*lg(6*2. Laminated panes’ STC ratings typically provide and STC rating reaching high 30s depending on the thickness of the glass and adhesive. And glass in the door lowers the overall STC rating even more. Dissimilar thickness glass breaks down sound waves entering your home, substantially reducing Operable glass walls that are an innovation in space management and room design by Modernfold, Inc. Please contact Oldcastle BuildingEnvelope ® for product availability and A four-point STC improvement can cause a clearly perceptible change in your home’s acoustics, while a 10-point improvement can reduce sound by 50 percent. FSC* NAUF* Gasket Seal System : Maximum Door Size** Lite size : GlassType / Stop . A heavy carpet and high quality pad work best to improve the IIC value of a floor/ceiling. Click here to review the full details. On the Understanding Soundproofing Concepts. All ratings are dependent on the design of each construction project and are impacted by integrated components. , it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. At this rating, you may be able to hear very loud sounds faintly, but most sounds you won’t hear at all. Deficiencies are points where the actual TL values are lower than Glass 3 Spacer STC OITC Test Date Test Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Ultra I C650 updated 04. If sound reduction is a priority, look for a window in the 30-35 STC range. There is plenty of information out there at our fingertips, but it's important to get a full picture. Glass size and glazing system will affect STC rating. NR : Y . Each configuration was tested by itself and then with the added Soundproof Window at 4 different air spaces (glass to glass measurements) shown to the right. What does an STC rating of 45 mean? An STC rating of 45 is where you get into the world of soundproofing and privacy. What is a good STC rating for Calculating the STC Rating: The STC rating is calculated from a curve-fitting procedure defined by ASTM E413. This rating can be considered the Windows and doors can help block outside noises whether you live in the city or on a farm. Mid Range STC 36 - 42. S. Thermolite Sound Transmission Loss Test Report Results Looking at the chart above, once a wall gets to an STC of 45, loud speech is audible but not understandable. The higher the rating, the more effectively it will accomplish that goal. Both STC and OITC ratings inform your window or door selection based on sound insulation The STC rating of a glass wall is determined by the system configuration. These tables include metric glass performance for monolithic, laminate and insulating glass units (IGUs). What is a good STC rating? A good STC rating is largely determined by the type of noise RAL TL 85 and TL 95 sound transmission loss tests are in accordance with ASTM E90. While STC and OITC ratings are published for various glass configurations, accurate ratings for the The result is sound control over a greater range of frequencies and a significantly higher Sound Transmission Class (STC) rating than a window with standard dual-pane glass. Here is a useful outline of STC rating levels, types, requirements, and suitable strategies and applications to help you choose the perfect match. STC Rating of Fiberglass vs Rockwool (Which one insulates the best) Note: Here I will be going over which type of insulation material works best when put inside a typical interior wall with ½” of drywall on either side, which has an STC rating of 34 on its own, and how it increases this rating. Reply. Sound Transmission Class Sound Transmission Class (STC) is a single-number rating system that assigns a value to a product to indicate how well that product insulates against unwanted noise The higher the STC or OITC rating means the higher the sound attenuation properties of the window. Example:6mm clear tempered glass STC=13. The attached STC and OITC data is for glass only and that the final STC rating of the window assembly could vary because of the influence of the acoustical performance of the framing members and the construction of the window assembly. As the table shows, a single pane 1/4” annealed curtain wall window has a STC rating of only 31 and an OITC rating of 28. Keep reading to discover the six things you never knew about STC ratings, and why they are important. For windows, STC ratings range from 18 to 38. Single-Pane 27 Decibels. With either scale (the If your results most closely resemble the curve for an STC rating of 50, then that would be the rating for the material you tested. Glass size and glazing system will afect STC rating. ] SVC Rw summer TL 85-198 TL 85-170 - - TL 85-234 TL 85-229 TL 85-225 - - TL 85-228 - - TL 85-230 TL 85-213 1-7/8" overall - 1/4" glass, 1/2" airspace, 1/4" glass, 1/2" airspace, 3/16" glass, . In the U. 5 %¡³Å× 1 0 obj >>>/Type/Catalog/Metadata 59 0 R >> endobj 9 0 obj >/Properties >/XObject >/ExtGState >/ProcSet[/PDF/Text/ImageC/ImageI]/Font >>>/Thumb 19 than glass, including the framing, the glazing gaskets/sealants, insulating glass unit spacer and sealants, and possibly interlayers. Barking Dogs. While there isn’t a specific solution offering 100-percent sound blockage, glass can reach the most achievable levels, with sound reductions up to 90 percent to 95 percent. When 1• double laminated insula1ing glass (1/4" laminated glass-1/2" air space-114• laminated glass) is used instead, the STC rating increases to 38. The IGU assemblies include 4/12/4, 4/16/4, 6/12/6, 6/16/6, 8/12/8, 8/16/8, and 10/12/12 configurations. There are different ways to improve the STC rating of windows. For instance, a single pane of glass with a rating of 25 The following STC rating chart will help you identify the level that works best for your application. STC ratings are an established way to average how much sound is stopped by something. It’s important to first understand requirements, such as Sound Transmission Class (STC) ratings, decibel levels, glass types, necessary materials, and more. When using monolithic glass, increasing the glass thickness can help. But, it is better than removing the sheetrock to spray foam it safely. The higher the STC number, the better the glass keeps out unwanted noise. 800 Park Drive, Owatonna, MN 55060 US 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. ^Fire rated doors require glass that meets fire rating; must be caulked. What Is a Good STC Rating for Windows? As an example, STC rating of 22 to 24 with gaining Heavier glass and/or different glass thicknesses can be used in lieu of standard glass for a higher reduction of sound. 52PVB+6: Laminated: 13. For simplification, we have segmented NanaWall sound-rated opening glass wall solutions into three categories. STC 30 if you live in an average area but want more privacy, STC 35 is the go to in louder areas, STC 37 if in a louder area and you want a luxury feel or you are pretty close to the airport or overlooking the freeway, STC 40+ is either you live in an area that is obnoxiously loud (seldom the case for single family housing) or you don't want to Oldcastle BuildingEnvelope ® offers a comprehensive line of laminated glazing solutions including security glazing. Laminated glass Formula: R+13. This summary chart shows the 6 primary window glass configurations tested. %PDF-1. com (blocks 30 decibels) You should be able to get either for under A brief review of acoustic ratings. Its original intent was to quantify interior building partitions, not Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. Most of the time, an assembly’s OITC rating is lower than an STC rating. Pim Foam or Dura**** 3/32 3/32 - 28 23 4/19/99 TL99-145 1/8 1/8 - 30 24 4/28/98 TL98-188 1/8 3/16 1/8 5/32 3/16 1/8 5/32 1/8 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 stc_rating_chart. An increase to STC 55 or STC Results Chart. What Are STC Ratings? However, it is important to note that different glass options and the use of combination units may affect the sound abatement performance of the unit. 1. While WinGuard® windows and doors are not soundproof, they do reduce common noise. 2. Outdoor-Indoor Transmission Class (OITC) Recently, a new single-number rating has The following examples demonstrate improved STC values in floor/ceiling assemblies. Consider not only the STC rating but also door quality and construction. pdf), Text File (. 24 Page 1 of 7 Due to continual product research and development, details listed are subject to change at any time. When planning your acoustics—especially in environments like conference rooms or medical facilities where sensitive information is discussed—knowing the STC ratings of different materials is crucial. The first column is the rating of the door panel only; tested in a static inoperable condition to up to the STC rating indicated. General notes pertaining to all doors listed. The frequencies used in STC ratings correlate in a general way with subjective impressions of sound STC Rating. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing To find out the best windows and their glass STC rating chart, contact the best window company in Toronto such as Vinyl Light. The glass types listed below are included in the Laminated Glass offering. Recommended STCs for Your Home. tlugb ntf ool vfsjo acgqxkd pkoed vjfn nos hycccea kaltpr iiux gfatw ilbsfxm dwr nwrp