Business Details
45 Years
experience
Emergency
services
Your Trusted HVAC Partner in Houston
Founded in 1981 by Randy Lange, Lange Mechanical has built a legacy of integrity, teamwork, and professionalism in commercial mechanical and building automation systems. Our commitment to excellence began with Randy's 'nothing is impossible' attitude and continues under Owner/President Jonathan Cramer, who assumed leadership in September 2023. We specialize in HVAC solutions for commercial and industrial properties across Greater Houston, serving Harris, Montgomery, Waller, Fort Bend, Brazoria, Galveston, Chambers, and Liberty counties. With over 42 years of experience, we deliver flexible, scalable systems that ensure optimal comfort, efficiency, and air quality.Our core valuesdreaming big, working hard with integrity, leading with service, and prioritizing customers and employeesguide every project. We maintain 4,000+ commercial and 3,350+ industrial projects with a team of 150+ professionals. Our 24/7 emergency services guarantee rapid response for uninterrupted comfort. Fully licensed in Texas (TACLA133231C), we serve diverse sectors including healthcare, education, retail, and government. Our LEED-certified projects, like the Wedge International Tower retrofit, demonstrate our dedication to energy efficiency. We remain committed to Randy Lange's vision while embracing innovation to meet evolving client needs.
Services
Building Automation Systems
Commercial HVAC
Indoor Air Quality
Maintenance & Repair
Emergency Services
Details
- Year established: 1981
Highlights and features
- 42+ years of commercial HVAC experience in Houston
- 24/7 emergency service with rapid response times
- Fully licensed Texas technicians (TACLA133231C)
- Served 4,000+ commercial and 3,350+ industrial projects
- LEED-certified energy efficiency solutions
What people say
24/7 emergency support
Energy-efficient solutions
Experienced technicians
LEED-certified projects
Prompt service
Services
Building Automation Systems
Our Building Automation Systems integrate HVAC, lighting, and security controls for optimal efficiency. Designed for commercial properties, these systems reduce energy consumption while maintaining comfort. We provide full lifecycle support from design-build installations to retrofits.
Commercial HVAC
Comprehensive HVAC solutions for commercial properties include system design, installation, and maintenance. Our Texas-licensed technicians ensure code compliance and energy efficiency. We specialize in large-scale systems for office towers, medical facilities, and industrial spaces.
Indoor Air Quality
Our Indoor Air Quality services ensure healthy environments through advanced filtration and ventilation systems. We install MERV-rated filters and humidity controls for healthcare facilities, schools, and commercial buildings. Regular maintenance prevents mold and improves occupant wellness.
Maintenance & Repair
Preventive maintenance plans extend equipment lifespan and prevent breakdowns. Our technicians perform quarterly inspections, lubrication, and system calibrations. Emergency repair services operate 24/7 with same-day response guaranteed for critical system failures.
Emergency Services
24/7 emergency HVAC services address urgent system failures. Our rapid response team handles commercial chillers, rooftop units, and automation system malfunctions. We prioritize restoring operations within hours to minimize business disruption.
People
Randy Lange
Founder
Randy Lange established the company in 1981 with a 'nothing is impossible' attitude. His core values of integrity and customer focus shaped the company's culture. He led the business until his passing, leaving a lasting legacy.
Jonathan Cramer
Owner/President
Jonathan Cramer became Owner/President in September 2023. With extensive HVAC industry experience, he continues Randy Lange's legacy while driving innovation. He focuses on expanding energy-efficient solutions and maintaining customer relationships.
Questions
What HVAC services do you offer for commercial properties?
We provide complete HVAC solutions including system design, installation, maintenance, and emergency repairs for commercial buildings.
Do you offer 24/7 emergency HVAC services?
Yes, our emergency team responds 24/7 with guaranteed same-day service for critical system failures.
Which areas do you serve?
We serve Houston and surrounding counties including Harris, Montgomery, Fort Bend, and Galveston.
Are your technicians licensed?
All our technicians hold valid Texas HVAC licenses (TACLA133231C) and undergo regular training.
Can you handle industrial HVAC systems?
Yes, we specialize in industrial HVAC systems with experience in manufacturing and warehouse environments.
Do you provide building automation systems?
We design, install, and maintain building automation systems for HVAC and energy management in commercial properties.
