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50+ Years
experience
Emergency
services
Your Trusted Partner for Industrial HVAC Solutions
Custom Controls has been a leader in hazardous location and industrial HVAC equipment since the 1960s. With over 50 years of experience, we specialize in designing and manufacturing explosion-proof and hazardous-duty HVAC systems tailored to meet the rigorous demands of global industries. Our team combines cutting-edge technology with a quality-first approach, ensuring reliable solutions for challenging environments. We pride ourselves on innovation, durability, and cost-effective customization, serving sectors like oil and gas, military, and data storage.

Our engineering expertise, combined with in-house fabrication and global after-sales support, ensures clients receive systems optimized for performance and longevity. We maintain a commitment to transparency, integrity, and client collaboration, offering 24/7 factory support and expedited replacement parts. Through rigorous testing and adherence to international standards like NEC, IEC Ex, and ATEX, we deliver equipment that performs in extreme conditions worldwide.
Services
Wall Mount Air Conditioners Explosion Proof Heaters Custom HVAC Systems Chemical Filtration Units Building Pressurization Systems Hazardous Duty Exhaust Fans Split System Air Conditioners Dehumidifiers Packaged Units Cabinet Coolers
Details
  • Year established: 1960
Highlights and features
  • We have over 50 years of experience in hazardous-duty HVAC engineering.
  • Our in-house design and fabrication ensure precise customization for client needs.
  • We provide 24/7 factory support and global on-site service capabilities.
  • Our systems comply with NEC, IEC Ex, and ATEX international standards.
  • We maintain a dedicated replacement parts inventory for rapid delivery.
Services
Wall Mount Air Conditioners
Custom Controls designs wall mount air conditioners for hazardous environments, ranging from 1-40 ton capacities. These units provide cooling, heating, and pressurization for industrial applications like offshore rigs and control rooms. Built with corrosion-resistant coatings and explosion-proof components, they comply with NEC and IEC Ex standards for safety and durability.
Explosion Proof Heaters
Our explosion-proof heaters deliver safe, efficient heating for hazardous locations. Constructed with stainless steel elements and low-watt-density designs, they prevent ignition risks in environments like chemical plants and oil refineries. Units meet Division 1/2 and Zone 2 classification requirements for global compliance.
Custom HVAC Systems
We engineer fully customized HVAC systems up to 100 tons for specialized applications. These include modular units for blast-resistant buildings and high-ambient environments. Systems integrate chemical filtration, variable-speed drives, and NFPA 496-compliant pressurization to address unique client challenges in extreme conditions.
Chemical Filtration Systems
Our chemical filtration systems remove contaminants in hazardous environments using deep-bed scrubber technology. Designed for industrial settings like laboratories and processing plants, these units ensure air quality while maintaining explosion-proof integrity per international safety codes.
Building Pressurization Systems
Building pressurization systems maintain safe airflow in hazardous facilities by preventing contaminant ingress. Custom Controls' solutions use variable-frequency drives and spark-resistant components to meet NFPA standards, ensuring operational safety in switchgear buildings and analyzer shelters.
Questions
What industries do your HVAC systems serve?
Our systems serve oil and gas, military, data storage, offshore drilling, and industrial control room applications globally.
Can you customize HVAC units for extreme environments?
Yes, we design systems for high-ambient temperatures up to 131°F and hazardous locations requiring NEC/ATEX compliance.
Do you provide international support?
We offer global on-site service through qualified technicians and 24/7 factory support for urgent needs.
How quickly can replacement parts be delivered?
We stock common parts for same-day or expedited shipping to minimize equipment downtime.
What safety standards do your products meet?
Our units comply with NEC 500/505, IEC Ex, ATEX, and NFPA standards for hazardous-duty operations.
Do you offer engineering support for project design?
Yes, our experienced team provides CAD drawings, heat load analysis, and system sizing for custom projects.