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Trusted HVAC and Building Automation Services in Mishawaka, IN
OJS Building Services has been delivering mechanical and building automation systems controller work for over a decade. Our legacy traces back to OJ Shoemaker, a company established in the 1920s, which laid the foundation for our deep industry expertise. We specialize in building automation systems (BAS), Reliable controller solutions, and mechanical engineering services, ensuring unmatched customer satisfaction. Our team combines decades of collective experience with cutting-edge technology to provide tailored solutions for commercial, industrial, and institutional clients. We pride ourselves on our status as an Authorized Reliable Controls dealer, a testament to our technical proficiency and commitment to quality. Our Total Lifetime Protection plan guarantees equipment longevity, including full replacement coverage, setting us apart in the HVAC industry.

With 24/7 service availability, we minimize downtime and prioritize energy efficiency, helping clients reduce operational costs. Our preventative maintenance programs are designed to optimize system performance while maintaining compliance with industry standards. We serve diverse sectors, including healthcare, education, and municipal infrastructure, with a focus on innovation and reliability. Our dedication to excellence has earned us recognition, including the 2021 Reliable Controls Million Dollar Milestone Award. At OJS Building Services, we are committed to delivering trustworthy, transparent solutions that meet the evolving needs of our clients.
Services
HVAC Services Building Automation Mechanical Service Energy Consultation Preventative Maintenance Plumbing Services Medical Gas Systems Commissioning Backflow Testing Equipment Installation
Highlights and features
  • We offer 12+ years of specialized HVAC and building automation expertise.
  • Our Total Lifetime Protection plan guarantees equipment replacement when needed.
  • 24/7 emergency service ensures zero downtime for critical systems.
  • LEED-certified solutions prioritize energy efficiency and sustainability.
  • Customized preventative maintenance programs reduce long-term operational costs.
Associations and certifications
  • LEED
  • Reliable Controls Authorized Dealer
What people say
Satisfied customers Excellent service Energy savings 24/7 coverage Expert technicians
Services
HVAC Services
Our HVAC services include installation, maintenance, and repair of commercial heating, ventilation, and air conditioning systems. We specialize in energy-efficient solutions that reduce operational costs while ensuring optimal indoor comfort. Our team provides 24/7 emergency support to minimize downtime for critical systems.
Building Automation
We design and implement building automation systems (BAS) to streamline HVAC, lighting, and security operations. Our Reliable Controls expertise enables clients to monitor and manage energy usage remotely, improving efficiency and compliance with sustainability standards for commercial facilities.
Mechanical Service
Our mechanical service division offers preventative and emergency maintenance for boilers, chillers, and process piping. The Total Lifetime Protection plan covers equipment replacement, ensuring long-term reliability for industrial and institutional clients with mission-critical infrastructure.
Energy Consultation
We conduct comprehensive energy audits to identify savings opportunities in commercial HVAC systems. Our recommendations focus on reducing energy consumption by up to 40% through system upgrades, automation, and optimized maintenance schedules tailored to client budgets.
Preventative Maintenance
Our Planned Maintenance Program extends equipment lifespan while reducing repair costs. Services include backflow testing, commissioning, and performance optimization for HVAC, plumbing, and medical gas systems in healthcare, education, and municipal facilities.
Questions
What HVAC services does OJS Building Services offer?
We provide installation, maintenance, and repair for commercial HVAC systems, including boilers, chillers, and air handlers, with 24/7 emergency support.
Do you offer building automation solutions?
Yes, we specialize in Reliable Controls-based automation systems to optimize energy efficiency for lighting, HVAC, and security operations.
Is financing available for HVAC upgrades?
Yes, we offer equipment leasing options to help clients implement energy-efficient systems with manageable payment plans.
What areas do you serve?
We serve South Bend, Elkhart, Mishawaka, and surrounding Indiana regions for commercial HVAC and mechanical services.
Are you LEED-certified?
Yes, we implement LEED-compliant building automation and energy solutions to support sustainable commercial infrastructure.