Brands you can trust

From form to function, explore our comprehensive portfolio of leading brands for all your separation requirements.

Our portfolio

The most recognized manufacturer of high-quality, made-to-order specialty door systems, Chase Doors is dedicated to delivering custom-made solutions tailored to specific needs.

Curtron Products is a trusted partner for restaurants and food service providers seeking to streamline operations, reduce energy costs, and uphold the highest standards of cleanliness and safety. Curtron’s comprehensive solutions ensure optimal temperature control, sanitation, and pest management.

Door Engineering is a trusted partner for architects and builders seeking high-performance, visually appealing fire station and aviation door solutions, providing a range of customized and pre-engineering door system options.

With a diverse selection of commercial, restaurant, and retail double acting traffic doors and frames, including gate and café doors, Eliason offers solutions that suit your unique requirements to facilitate seamless movement, enhance productivity, and create a safer working environment.

Hercules® offers a complete line of specialty doors for your specific applications including Blast Freezer, Freezer, Cooler, Docks, Processing, Automotive Test Cells, Research Facilities, and Distribution Facilities. With more than a dozen different designs, Hercules® has the door to suit your climate controlled needs. Controlled environment door solutions for food manufacturers and distributors in the dairy, meat, produce, beverage, pharmaceutical and food processing industries.

With a strong emphasis on short lead times, customer satisfaction, and product innovation, HMF Express sets the standard for custom hollow metal products, offering unparalleled quality and reliability that not only meet but exceed industry standards.

Since 2005, Subzero Engineering has contained critical environments and provided exceptional solutions to the world’s most demanding technology companies. A global leader in turnkey engineering solutions for Simplex industrial cleanrooms, data centers, and mission-critical environments, Subzero solutions provide maximum efficiency, minimize downtime, and reduce energy consumption.

Thermoseal, a leading provider of commercial refrigeration solutions, offers DOE compliant cooler and freezer glass doors and merchandising systems designed for superior viewing and performance. With a focus on sustainability and cost-effectiveness, Thermoseal doors provide clear visibility while maintaining optimal temperature control and energy savings.

Our growing portfolio

See how our family of leading specialty door brands has evolved over time.


Chase Industries, Inc.

Durus Industries

Saino

Econo-Max

ColdGuard

Fib-R-Dor

Eliason

Senneca

Thermoseal & Rubbair Door

Door Engineering

TMI

Curtron

Subzero Engineering

Hercules Door

HMF Express

Door Engineering Center of Excellence

Thermoseal Center of Excellence

Subzero Center of Excellence

Cold Storage Doors Center of Excellence

HMF Express Center of Excellence

HMF Express Center of Excellence

HMF Express Center of Excellence

HMF Express Center of Excellence

Explore by product

Check out our wide range of products for all your separation needs.

Air curtain solutions by Senneca
Specialty Aviation hangar doors by Senneca
Subzero Engineering Simplex cleanroom and separation solutions
Hercules cold storage door solutions
Subzero Engineering data center containment solutions
Curtron custm swing door solutions
Four-fold fire station doors by Door Engineering
HMF specialty steel door frame solutions
Senneca industrial curtain solutions
Senneca cold storage specialty door solutions
Senneca roll up specialty door solutions
Reliable specialty doors by Eliason
Pest control door solutions by Senneca

Let’s Connect

Learn more about our family of leading brands when you contact us.

Chase Doors logo
ColdGuard logo
Curtron Products logo
Door Engineering logo
Eliason logo
HErcules logo
HMF Express logo
Saino logo
Subzero Engineering logo
Thermoseal logo
TMI logo
Chase Doors logo
ColdGuard logo
Curtron Products logo
Door Engineering logo
Eliason logo
HErcules logo
HMF Express logo
Saino logo
Subzero Engineering logo
Thermoseal logo
TMI logo
Chase Doors logo
ColdGuard logo
Curtron Products logo
Door Engineering logo
Eliason logo
HErcules logo
HMF Express logo
Saino logo
Subzero Engineering logo
Thermoseal logo
TMI logo