Business Details
50 Years
experience
Emergency
services
Trusted HVAC Solutions in Indianapolis
Since 1976, Johnson Melloh has established itself as a leader in mechanical contracting and energy solutions. Our approach centers on providing tailored solutions rather than rigid service boxes, driven by a commitment to honesty, integrity, and innovation. With over 40 years of experience, we bridge design, engineering, and mechanical contracting to deliver cost-effective, energy-conscious systems for industrial, educational, and healthcare facilities. Our certified technicians specialize in HVAC, boiler systems, and renewable energy technologies like solar water heating. We prioritize long-term customer relationships through responsive 24/7 service and a focus on community impact.Our Midwest-based team combines self-performance capabilities with manufacturer certifications from Carrier, Daikin, and Rinnai. From retrofit projects to full-service maintenance, we help facilities evolve sustainably while maintaining operational efficiency. Our CEO emphasizes trust as the foundation of our success, ensuring every decision aligns with customer needs, employee well-being, and ethical responsibility. This philosophy has earned us recognition as a preferred partner for complex facility challenges.
Services
Mechanical Contracting
Energy Efficiency
LED Lighting
Solar Solutions
Boiler Systems
HVAC Maintenance
Retrofit Upgrades
Water Conservation
Facility Consulting
24/7 Emergency Service
Details
- Year established: 1976
Highlights and features
- 40+ years of Midwest mechanical contracting expertise
- Factory-certified technicians for major HVAC brands
- Integrated energy efficiency and renewable energy solutions
- 24/7 on-call service with rapid response times
- Proven track record in healthcare and educational facilities
Associations and certifications
- Carrier Control Experts
- AERCO Boiler Factory Technicians
- Rinnai Commercial Service Provider
- Daikin VRV PRO Dealer
- Marley Cooling Tower Factory Technicians
Services
Mechanical Contracting
Full-service mechanical contracting for new construction and major renovations. Our team handles complete HVAC system design, installation, and commissioning with manufacturer-certified expertise. Specializing in commercial and industrial applications, we ensure code compliance and energy efficiency while maintaining project timelines and budgets.
Energy Efficiency
Comprehensive energy optimization solutions including system audits, LED lighting retrofits, and building automation controls. We implement Honeywell systems and energy modeling to reduce consumption while maintaining comfort standards. Our approach balances upfront investment with long-term operational savings for facility owners.
Solar Solutions
Solar technology integration services featuring photovoltaic systems and hybrid solar water heating. We offer SunBandit solar solutions and ductless heat pump installations that reduce energy costs while meeting sustainability goals. Our engineers design systems tailored to facility-specific energy demands and roof configurations.
Boiler Systems
Specialized boiler installation, maintenance, and repair services with AERCO and Rinnai factory-certified technicians. We handle both low-temp and high-pressure systems for commercial applications, including preventive maintenance contracts that extend equipment lifespan and ensure reliable operation during peak demand periods.
24/7 Emergency Service
Around-the-clock mechanical service for critical system failures. Our rapid response team provides emergency HVAC repairs, backflow testing, and snow-melt system maintenance with guaranteed technician dispatch within 30 minutes of service requests to minimize facility downtime.
People
Nick Melloh
CEO
Nick Melloh leads Johnson Melloh with a focus on customer trust and innovative solutions. With over 40 years in mechanical contracting, he emphasizes community impact and employee development while maintaining technical excellence in HVAC and energy systems.
JM Boiler Team
Mechanical Specialists
Factory-certified boiler experts with AERCO and Rinnai training. This specialized team handles complex installations, preventive maintenance, and emergency repairs for commercial boiler systems across Midwest facilities.
JM Low-Temp Team
HVAC Technicians
Specialized technicians certified in ultra-low temperature systems for medical and industrial applications. The team implements Panasonic and NuAire equipment solutions while maintaining strict compliance with facility-specific environmental control requirements.
Questions
What HVAC services does Johnson-Melloh offer?
We provide full-service HVAC solutions including installation, maintenance, emergency repairs, and energy efficiency upgrades for commercial and industrial facilities.
Are your technicians certified for major HVAC brands?
Yes, our team holds factory certifications for Carrier, Daikin, Rinnai, and AERCO systems, ensuring expert service for major equipment brands.
Do you specialize in energy-efficient building solutions?
We focus on energy-conscious solutions including LED lighting retrofits, solar water heating systems, and building automation controls to reduce operational costs.
What geographic areas do you serve?
While headquartered in Indianapolis, we serve commercial clients throughout the Midwest region for mechanical contracting and maintenance services.
Can you handle both new construction and retrofit projects?
Our capabilities include design-build for new construction and comprehensive retrofit upgrades to modernize existing HVAC and mechanical systems.
How do you handle emergency service requests?
We offer 24/7 emergency HVAC service with rapid response teams available to address critical system failures and maintenance issues.
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