SVL

Commercial HVAC

SVL News

Optimizing Building Acoustics – Add Value, Reduce Risk, and Elevate Your Projects

← Back to News

On August 27, 2025, SVL hosted another Coffee Break Webinar, diving into the often-overlooked subject of building acoustics. The session, Optimizing Building Acoustics – Add Value, Reduce Risk, and Elevate Your Projects, featured Paul Mottola, Regional Sales Manager for Vibro Acoustics, who shared his expertise in HVAC noise control and acoustic design assist programs.

With over 20 years of industry experience, Paul guided attendees through best practices for applying silencers (also known as duct attenuators, sound attenuators, or sound traps), managing system effects and pressure drop, and ensuring projects meet required noise criteria (NC rating). His insights underscored how proper planning not only reduces complaints but also protects the project team from costly rework.

Why Building Acoustics Matter in HVAC Projects

Noise from HVAC systems is one of the most common sources of occupant dissatisfaction. Whether in K-12 classrooms, libraries, hospital mechanical rooms, data centers, or government facilities, sound levels must meet ASHRAE acoustic standards and sometimes local environmental noise ordinances.

Paul reminded the audience that addressing acoustics early typically accounts for less than 1% of the total mechanical budget. Ignoring it, however, can lead to retrofit solutions that cost five to ten times more—if the problem is even fixable. From rooftop units over occupied spaces to generator rooms in hospitals, early planning ensures comfort, compliance, and cost savings.

Understanding Noise Paths and System Effects

Attendees learned how noise paths—such as radiated noise, breakout noise from lightweight ductwork, duct borne noise, and vibration transfer—affect overall sound performance. One of the biggest pitfalls is relying only on catalog silencers, which assume perfect lab conditions.

Poor placement (such as too close to an elbow) creates system effects that drastically increase pressure drop. A silencer designed for a 0.15″ pressure drop might operate closer to 0.78″ when installed incorrectly, choking system performance.

The message was clear: proper silencer placement and project-specific acoustical analysis are critical to ensure energy-efficient, quiet systems.

The Vibro Acoustics Design Assist Program

A highlight of the session was Vibro Acoustics’ Lay-in Design Assist Program, a complimentary service that includes:

  • Acoustic system analysis tailored to your project
  • Product selection for silencers, sound curbs, and vibration isolation solutions
  • PE-stamped acoustic calculations using ASHRAE and AHRI acoustic testing standards
  • Fast turnaround (2–3 days) so projects keep moving

This program reduces liability for engineers and contractors by guaranteeing results. If the installed silencers or acoustic curbs fail to meet the specified NC 35 or NC 40 noise criteria, Vibro Acoustics will make modifications or replacements and cover in-and-out costs.

Applications Across Markets

Paul shared real-world applications where sound attenuation solutions add value:

  • Schools and hospitals: meeting NC 35 requirements in classrooms and patient areas
  • Data centers and labs: using no-media silencers and film-lined (hospital grade) silencers for sensitive environments
  • Rooftop units: pairing vibration isolation curbs with integrated silencers to control breakout and radiated noise
  • Chillers and cooling towers: ensuring compliance with environmental noise ordinances at property lines
  • Generators: designing intake and discharge silencers, plenums, and acoustical louvers to control reverberant noise and ensure reliable backup power

Each case showed how a system-level approach is more effective than piecemeal solutions.

Common Questions Answered

The Q&A addressed frequent engineering concerns:

  • What happens if noise criteria aren’t met?
    Vibro Acoustics guarantees performance and covers modifications.
  • Do sound curbs meet insulation codes?
    Yes—sound curbs can be insulated to meet R-10 requirements for Minnesota and other regions.
  • Are silencers, sound attenuators, and sound traps the same?
    Yes—the terms are interchangeable, though preferences vary by region.

Final Takeaways

Optimizing acoustics isn’t just about quieting equipment—it’s about reducing project risk, meeting compliance, and ensuring occupant satisfaction. With design assist services, PE-stamped analysis, and a performance guarantee, Vibro Acoustics helps engineers and contractors move forward with confidence.

Don’t Miss the Next SVL Coffee Break

Be sure to catch the next SVL Coffee Break—our exclusive 50-minute webinar series featuring the HVAC industry’s most innovative voices. Whether your focus is on decarbonization, operating cost reduction, or long-term energy planning, SVL is your trusted partner in delivering sustainable HVAC solutions.

To stay informed about upcoming sessions, sign up for our marketing emails, opt-in now.

And of course, don’t hesitate to connect with your SVL Sales Engineer today to discuss your next project.

Contact Us Today To Learn More About Vibro Acoustics

Contact Us

Contact Us

    Reason for Contacting

    Get in TouchBillingEventsTraining/SeminarLiterature/Graphics/LogosEngineering ProjectsOther



    This will close in 0 seconds

    Parts Inquiry



      This will close in 0 seconds

      Equipment Inquiry



        This will close in 0 seconds

        Shipping Date/IOM Manuals/Wiring Diagrams Request



          This will close in 0 seconds

          Question for Sales Engineers



            This will close in 0 seconds

            Service Contact



              This will close in 0 seconds

              Aftermarket Parts




                This will close in 0 seconds

                General Job Application




                  This will close in 0 seconds

                  Hydronics Contact Form



                    This will close in 0 seconds

                    Viral Mitigation Contact Form



                      This will close in 0 seconds

                      Jim Lubratt

                      President & Chief Executive Officer

                      Jim Lubratt has been president of SVL since 2006. He first joined the company as a sales engineer in 1992 and was made a partner in 2000. He holds a Bachelor of Science in mechanical engineering from Southern Methodist University and first entered the HVAC industry as a marketing engineer for a heat pump manufacturer in Texas.

                      In addition to his role at SVL, Jim is vice president of AQC Industries, LLC, a manufacturer of specialized underground ductwork systems. He is also an investor and board member for Hydromx, Inc., a manufacturer of heat transfer nanofluids, and Crotega, Inc., creators of personal and building security solutions.

                      Jim and his wife, Tracy, met in college and married in 1993. They have three children, two of whom have graduated college in Texas, while their youngest is attending Grand Canyon University in Arizona.

                      Outside of work, Jim places a priority on his faith, family, friends, and fitness. He enjoys helping people-supporting charities, time with his wife and kids, road-biking with friends and efforts to stay physically fit.

                      A message from Jim on the achievements of SVL

                      SVL started in February 1967 by Charlie Schwab and Craig Vollhaber. Schwab-Vollhaber, Inc. (as it was named at the time) steadily grew and, in 1985, welcomed Paul Lubratt as another partner, becoming Schwab-Vollhaber-Lubratt, Inc. SVL’s founders had the determination to build the most talented, customer-focused HVAC representative in the Midwest. Our original drive and passion still shape the company and culture to this day. The achievements of an organization are the results of the combined efforts of every individual. From humble beginnings, SVL founders paved the way to industry success with hard work and determination. “Today, SVL is strongly organized with great people to lead our industry forward as we are challenged with fast-paced changes to reduce our environmental impact,” says Jim. Now, 55+ years later, SVL is under the leadership of two new principals who share the same vision and drive that has propelled SVL throughout the years. Built on a foundation of integrity, Jim Lubratt, and Charlie Vollhaber strive to ensure opportunities for personal growth, improved work environment, and shared life enrichment. The achievements of our organization are the results of the combined efforts of every individual.

                      This will close in 0 seconds

                      Charlie Vollhaber

                      Executive Vice President & Officer

                      Charlie Vollhaber is a third-generation employee at SVL, as a grandson of company co-founder Craig Vollhaber and son of former CEO Todd Vollhaber. Charlie holds a Bachelor of Science in mechanical engineering and an MBA, both from the University of Minnesota. He became an outside salesman for SVL in 2013, was made a partner in 2019, and then executive vice president and officer in 2022.

                      He grew up playing sports, including football, basketball, golf, and track, and enjoys the competitive nature of the HVAC industry. “I like that no two days are ever the same as there are always questions to answer and problems to solve,” he says. “Most of all, I enjoy working with great people and coordinating together on challenging projects to achieve positive results together.”

                      Outside of work, Charlie enjoys spending time with his wife, Lesley, and their three boys. He’s also fond of golfing, traveling, and attending concerts and sporting events. One of his favorite quotes is from the book of Philippians: “Do nothing from selfish ambition or conceit, but in humility count other more significant than yourselves. Let each of you look not only to his own interests, but also to the interests of others.” Because HVAC and construction is such a team effort, he says, “this mindset helps to create positive results in a vast majority of situations.”

                      A message from Charlie on the culture of SVL

                      “At SVL, we strive to cultivate a unique culture that revolves around finding and empowering exceptional individuals. We believe in equipping our team members with the right tools and resources to succeed.

                      As we’ve grown the business, we have deliberately maintained a small firm culture, fostering an environment where collaboration thrives. We encourage open dialogue and promote a sense of comfort among our employees, allowing anyone to ask questions and seek guidance from anyone else, regardless of their level within the organization.

                      We foster a workshop-like atmosphere where everyone’s contribution is valued. Presenting your work to another individual or a group of teammates provides a platform for collaboration, where ideas are shared, dissected, and improved collectively. We firmly believe in the power of mentoring and provide various avenues for both formal and informal guidance. Whether it’s through structured training programs or casual conversations, we encourage team members to discuss a wide range of topics, from work-related successes or issues to everyday personal life topics.

                      In summary, our culture is built on the foundation of attracting exceptional individuals, empowering them with the necessary tools, and fostering a collaborative environment where mentorship and growth thrive. We are committed to creating an atmosphere where every team member feels supported, valued, and encouraged to reach their fullest potential.”

                      This will close in 0 seconds

                      Al Gramse

                      Vice President of SVL Service Corporation

                      Al Gramse has been in the HVAC industry for over 30 years. He began as a service technician.  Then over his career worked in technical support, building automation, then service manager prior to his current role.

                      How did Al end up in the HVAC industry?  “After high school, I took a couple years to figure out what I wanted to do.   Where I was working at the time, a grumpy old coworker, who I didn’t get along with, walked up to me and said ‘What are you doing here?  Go back to school.’”  I said, “For what?”  He said “There’s a tech school down the street.  Go down there and pick something that interests you”. Then he walked away.  That weird interaction, with someone I didn’t get along with, sent me down a 30-year path in the HVAC industry.   Never underestimate the potential of a little encouragement.   Even if it is from a strange source.

                      Al has been with SVL for 15 years and is the head of our SVL Service division. “The people here are some of the best in the industry,” Al says. “A bunch of team-oriented, knowledgeable, go-getters.” His personal mantra is “figure it out,” “Do a little fact-finding on your own. Use your own brain before you use someone else’s. But know when to ask for help.” he prescribes. “It’s amazing what you can accomplish on your own if you dig in a little bit.”

                      Outside of work, Al has lots of outdoor hobbies, including hunting, fishing, and motorcycling, though his favorite pastime is simply hanging out with family.

                      This will close in 0 seconds

                      Jennifer Roach

                      Director of Marketing, Events & Administration

                      More than just a creative director, Jen brings 30 years of marketing and leadership magic to SVL. Her journey began in the trenches of graphic design, quickly evolving into crafting eye-catching campaigns for iconic brands like Target, Gabberts, Gander Mountain and Camping World. As a seasoned director and agency veteran, she honed her skills with recreational vehicle giant Parts Unlimited before leading creative teams at HOM Furniture and, ultimately, landing at SVL during a crucial growth phase.

                      Jen thrives on "servant-leadership," empowering her team and fostering a culture of trust and mutual respect. "It unlocks their potential, fuels creativity, and leads to work we're all proud of," she says. "I want my team to care, collaborate, and push boundaries together."

                      When not shaping impactful campaigns, Jen enjoys weekend adventures with her husband, Scott, and son, Crew. Their lives are a tapestry of shared passions, from bike rides and baking experiments to cheering on Simley High School wrestlers. And with her recently built forever home in Cottage Grove, her free time now includes a new, thrilling chapter: weekend renovation warrior!

                      This will close in 0 seconds

                      Mike Ruff

                      Vice President of Information Technology

                      Mike Ruff, the Vice President of Information Technology at SVL Inc., is a seasoned professional with an impressive 24-year tenure in the IT industry. His journey in the field is marked by extensive experience and expertise in various domains, including serving as a Cloud Architect focusing on Azure Software as a Service (SaaS), Infrastructure as a Service (IaaS), and both B2B and B2C solutions. Mike’s skills extend to being a Security Architect, where he has honed his knowledge in safeguarding digital assets, and he is also proficient in the Microsoft 365 stack, virtualization, routing, switching, and wireless technologies.

                      Beyond his professional roles, Mike is deeply passionate about technology in all its forms, which is evident in his career and personal hobbies. His love for technology is not just limited to his work but also spills over into his leisure activities. In the summertime, Mike enjoys the thrill of riding his motorcycle, embracing the freedom and adventure it brings. When winter arrives, he switches gears to snowboarding, seeking the excitement and challenge of the snowy slopes. These hobbies reflect Mike’s dynamic personality and continuous pursuit of technically engaging and physically exhilarating activities.

                      Mike Ruff's blend of professional expertise and personal passions make him a unique and valuable asset to SVL Inc., embodying a perfect synergy of technical acumen and a zest for life's adventurous aspects.

                      This will close in 0 seconds