Our Mission
Assist those looking to create healthier, more sustainable indoor environments by partnering to develop the most effective and economical solutions. We believe comfort and energy efficiency should go hand in hand — for people, for buildings, and for the planet.
What We Do
Assisted Design
We support Owners, Architects, MEP firms, and Contractors with novel approaches and practical insights to help realize smarter, more efficient building designs, with economics always in mind.
Manufacturer of Metallic Micro-Perforated Diffusion Solutions
Including SPIROJET®, MIX-IND® and Cold Air Barrier®.
R & D
Training
We believe in sharing our 40+ years of knowledge, and offer factory training in Milan, Italy on a regular basis.
Who we are
SINTRA was established in 1995, after 15 years of applied research, with the specific aim of bringing a novel approach to traditional air distribution. Invented in 1981 by Marco Zambolin, current president of SINTRA and the creator and patent holder of the perforated channels in use today.
SINTRA (Innovative Air Treatment Systems) is the first manufacturer of perforated metal ducts in Europe, used for the PULSION of ambient air and for the DIFFUSION of supply air. Ideal for any type of application, both commercial and industrial.
Patents
Years of experience in the design of ambient air PULSION systems
High performance systems in various sectors of industry and the tertiary sector
Years in business
Global employees
Founded in 1937 Cross Group has built a global operation with over 300+ strategically located employees. Cross Group gained sole representation of Sintra in North America beginning in 2025 and continues to be a leading provider of Sintra solutions in Europe. They are heavily invested in the success of Sintra world-wide and are actively involved in expanding operations in North America.
Cross Group is a dynamic company with specialist divisions delivering large-scale projects to a wide spectrum of sectors, including: Commercial and Industrial Refrigeration, Commercial Air Conditioning, Fruit Ripening and Industrial Temperature Control.
Our Approach
Assisted Design
We evaluate every project with a whole-room approach—ensuring all air is moved effectively. Unlike traditional solutions or products that often address only part of a space. This allows us to deliver solutions that are more economical, energy-efficient, and better aligned with occupant comfort and performance goals.
Construction and Contracting
We’re actively involved throughout the entire construction process—from early design and contract execution to on-site coordination and final commissioning. By staying engaged at every stage, we help ensure smoother project delivery, clearer communication across trades, and systems that perform as intended from day one.Ongoing Research and Development
Ongoing Research and Development
After each project, if conditions allow, we conduct smoke testing to visualize system performance, fine-tune airflow, and ensure real-world conditions align with design intent. These tests not only validate outcomes for our clients—they also fuel our ongoing research and development, helping us refine future designs and expand our growing library of real-world data.
Years Established
Completed Projects
Our Story
Basic Research
In 1981, Marco Zambolin, SINTRA’s founder and current CEO, registered the first patent that would later become: MIX-IND® Technology. The idea was born from the analysis of stratification and uneven air distribution problems in a 60 foot high 100,000+ ft2 PIRELLI factory in Italy. It marks the beginning of the BASIC RESEARCH period and the birth of perforated channels.
1981-
1983
Applied Research
This database enabled the creation of a mathematic model that would guarantee results even on the most challenging installations in terms of temperature homogeneity and residual speed control.
1983-
1995
Technology Development
In 1995, SINTRA company was created with a production facility near Milan, Italy and a liaison office in France. MIX-IND® Technology found early success in large industrial settings. Technology applications slowly expanded to almost all industry sectors. Over time SINTRA gained additional knowledge in all types of large volume spaces as well as small spaces with unique challenges.
From
1995
Great changes
From 2009 to 2012, SINTRA registered new patents, derivatives of the base technology MIX-IND®. These patents were developed in the pursuit of solving technical challenges and are continuously in use today. Highlighting the importance of our ongoing research.
2009-
2012
Growth and Expansion
Beginning in 2012, SINTRA entered a phase of exponential growth, driven by the expansion of our patented MIX-IND® technology and the launch of next-generation air distribution patents. This period includes the widespread adoption of micro-perforated solutions in the European market by other manufacturers. To support growing interest and adoption, Sintra opened a Net-Zero training and test center in 2021. Welcoming owners, design professionals, distributors and contractors to experience Sintra technologies first. This facility is currently in use providing hands-on demonstrations, factory training and facility tours.
From
2012
SINTRA Today
SINTRA remains Europe’s leading producer of micro-perforated metallic ducts and continues to expand as a global organization. The partnership with Cross Group, announced in 2025 enhances operational capabilities in North America, supporting the delivery of innovative solutions and the advancement of ongoing research and development.
Today
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We Can't Wait to Make Your Projects a Reality
A Cross Group Partner
