Industrial Heating Experts Supporting Contractors Across the Midwest
We support mechanical contractors and engineers with energy-efficient HVAC systems, expert layout consulting, and reliable product sourcing. Count on us for heating solutions that perform, backed by decades of experience and responsive service.
40+ Years of Industrial Heating Expertise
L.D. Thornton & Associates has helped mechanical contractors and engineers deliver industrial heating systems that perform. Founded by Len Thornton with a handshake and a commitment to doing things right, our company has grown through relationships, referrals, and results.
From early partnerships with major boiler manufacturers to decades of project support across Indiana, we’ve consistently focused on providing fast quotes, dependable service, and practical design insights. Today, our team continues to serve factories, warehouses, and industrial contractors with the same values Len instilled: honesty, responsiveness, and technical expertise.
As a family-owned company based in La Porte, Indiana, we remain hands-on, from consulting and equipment sourcing to layout support and installation coordination. We’re here to ensure your heating systems run smoothly, from day one and for years to come.
Our Business Philosophy
We believe that doing great work starts with being a good partner. At L.D. Thornton & Associates, our mission is to support contractors, engineers, and our local Indiana community with honesty, respect, and dependable industrial heating solutions. Whether on a jobsite or in everyday life, we lead with service, integrity, and a commitment to doing what’s right—for our customers and our community.
Why Contractors Rely on LD Thornton
We help mechanical contractors, engineers, and design-build teams deliver industrial heating systems that work efficiently, reliably, and cost-effectively. No guesswork, just results backed by real data and proven equipment.
Need Reliable Industrial Heating Solutions for Your Next Project?
Whether you’re sourcing HVAC equipment, planning a new mechanical room, or need expert support with heating system design, LD Thornton helps contractors and engineers deliver results. Our team provides trusted industrial products, design consulting, and accurate quotes tailored to your project’s specs and timeline.