Protecting HVAC Systems Through Reliable Temperature Safety Controls
Firestat, a division of Senasys, designs and manufactures duct high limit switches that help protect commercial HVAC systems from overheating. Our products are trusted by contractors, OEMs, distributors, and facility managers throughout North America for their reliability, quality, and ease of installation.
Why Contractors and OEMs Choose Firestat
- Manufactured in Eau Claire, Wisconsin, U.S.A.
- UL Recognized products
- Fast lead times
- Custom temperature settings
- Custom probe lengths
- Quantity pricing
- Direct manufacturer support
- Individually tested products
Product information
Compare models of duct high limit controls.
INSTALLATION GUIDE
View our guide to install your firestat.
COMMON APPLICATIONS
Learn more about where our duct high limit switches are used.
FAQs
Most of your questions, answered.
WHO WE ARE
We excel at helping OEMs solve problems
Firestat, a division of Senasys, is a leading manufacturer of High Duct Limit Control Switches for the HVAC industry. Senasys has been supporting the Firestat product line since 2016, and moved the manufacturing of the line in 2023. At that time, we moved production from Iowa to our facilities in Eau Claire, Wisconsin, where we continue to support HVAC contractors, OEMs and distributors.
Since acquiring the Firestat product line, Senasys has made many improvements to the manufacturing process, product quality, and lead times, while still maintaining a competitive cost for our customers.
Senasys’ Quality Management System is registered to ISO 9001:2015, reflecting our commitment to consistent processes, customer satisfaction & continual improvement. The registration covers the design and development of niche manufacturing products in the electro-mechanical industry.
Additionally, the Firestat is a unique product line in that it fulfills many states’ building code requirements followed by contractors and HVAC installation personnel, making our customer outreach diverse.
In addition to duct controls, Senasys produces over a million products annually across a diverse range of more than 15 varieties. We proudly serve an array of industries, including food service, medical, industrial, HVAC, aerospace, railway, aquatic, electronics, and more. Our dedication to innovation and quality has established us as a trusted partner in these diverse fields.
Senasys excels at helping OEMs using small to large volumes of devices solve problems related to temperature, pressure/vacuum, air flow, industrial machining and more. We strive to be a fast and dependable supplier for all our customers. This includes everyone from small manufacturers all the way up to Fortune 500 companies, and everything in between.
With our in-house fabrication shop, we have the ability to customize our products to meet requirements, whether it’s a specific bracket specification to meet fit requirements, terminal connections and more.
Learn more about Senasys’ product offering by clicking below.
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Our Mission
Our mission is to find and support niche manufacturing products, ensuring that unique market demands are met with innovative solutions. Our commitment to excellence drives us to deliver solutions that consistently exceed expectations.
Our specialties include advanced temperature and pneumatic control solutions, as well as custom manufacturing and machining. Through our in-house fabrication capabilities, we deliver high-quality, custom-engineered solutions tailored to meet unique specifications.
CUSTOM SOLUTIONS
At Senasys, we understand that standard solutions may not always meet the unique requirements of every application. Our team works closely with customers to develop custom specialized solutions, tailoring products to specific needs and ensuring high reliability and functionality for any project. Whether it’s a minor modification or a completely new design, we have the capability and expertise to deliver.
Our teams work directly with HVAC contractors, OEM manufacturers, distributors, and facility managers to recommend the proper duct high limit control for each application. We also support custom temperature settings, probe lengths, and private-label manufacturing.
CUSTOMER COMMITMENT
Our customers are at the heart of everything we do. We provide our customers with flexibility and top of the line customer support to be sure your needs are met.
We offer competitive bulk pricing to OEMs and distributors, fast lead times, and exceptional customer service. When you reach out to Senasys, you speak directly with a knowledgeable representative who can assist you with technical support or ordering questions. We believe in building lasting relationships with our customers, providing support and solutions that drive their success.
QUALITY ASSURANCE
Each product is 100% tested to ensure it meets the highest standards of quality and performance. This rigorous quality assurance process ensures that our customers receive only the best products.
Our products meet global standards, carrying approvals such as UL, cUL, RoHS, and REACH, ensuring reliable and safe performance.
Senasys is ISO 9001 Certified.
MADE IN THE U.S.A.
All Senasys products are proudly designed and manufactured in the USA. Our facilities in Eau Claire, Wisconsin, are equipped with state-of-the-art technology and staffed by a team of dedicated professionals committed to producing the highest quality products.
Industries Served
COMMERCIAL BUILDINGS
- Office buildings
- Retail stores
- Shopping centers
MULTI-FAMILY HOUSING
- Apartments
- Senior living
- Student housing
INDUSTRIAL Environments
- Manufacturing
- Warehouses
- Equipment
INSTITUTIONAL settings
- Schools
- Hospitals
- Government buildings
Testimonials
For over 20 years, Firestat has manufactured duct high limit controls used throughout North America. Every control is manufactured and tested in Wisconsin by Senasys and supported by engineers with decades of temperature control experience.
Serving the HVAC industry since 1980.
Over 30,000 Firestats installed annually.
We needed 11 duct controls for an inspection of an apartment building. Company was easy to work with and helped us find what we needed to pass the inspection.
Alex R.
Contractor
Purchased one of these units for my furnace. It is a quality product and great customer service provided as well.
Tyler A.
Home Owner
I’ve recommended the firestat product offering to multiple companies I have worked for. It’s a great product, and the service the company provides is outstanding!
Anonymous
Distributor
Our Core Values
Attention to Detail
Dependability
Accountability
Problem Solving
Team Work
Efficient
Our Story
Founded in 1999, Senasys has evolved from a modest team of three employees into a thriving company with over fifty dedicated professionals. Operating out of Eau Claire, Wisconsin, with two facilities making up over 60,000 sq ft, the majority of our parts are made in-house, ensuring tight control over quality and manufacturing processes. Additionally, we have several overseas partnerships to provide more capabilities and economical solutions to our customers.
Since our beginnings, we have continuously grown in both our product selection and our commitment to excellence. We currently have over a dozen product lines, including temperature & pressure switches, industrial controls, electric immersion heaters and machining capabilities.
Regardless of what changes happen in the world, Senasys will always be committed to providing the best possible solutions at the best possible value.
Our Brands
Senasys supports and finds solutions for niche manufacturing products in the electro-mechanical industry. With our industry knowledge and direct customer service, we can support other original equipment manufacturers globally. See our additional brands below!
Visit a website below to learn more!
Our office hours are
Monday – Friday
8 a.m. to 4 p.m. CST
Firestat
A Division of Senasys