Design
Build
Commission
National Mechanical & Design is your single-source partner for HVAC, refrigeration, and controls—one team, one point of contact, one streamlined process from first sketch to final commissioning, nationwide.
Powering Industrial & Commercial Facilities with Design-Build Mechanical Solutions
A mechanical system is more than ductwork and equipment. It is infrastructure your business depends on every single day. As a single-source mechanical design-build partner, we bring HVAC, refrigeration, and controls together under one team, one contract, and one accountable process, from first sketch through final commissioning.
We are not in the business of handing off drawings and walking away. We stay in it with owners, engineers, and general contractors from concept to completion, because our mindset is simple: we win when our partners win. That is what drives smarter, more cost-effective mechanical design built for real budgets and real operational demands.
What started in St. Louis has grown into a team working coast to coast, but the approach has not changed: treat people fairly, do the work right, and build systems that perform for the long haul. Whether you are breaking ground on your first facility or scaling a national portfolio, we are ready to be your mechanical partner every step of the way.
Good mechanical design starts before a single drawing is final. We get involved early with load calculations, system evaluations, and real-time cost and schedule input so owners and general contractors can make confident decisions before construction ever begins.
From first concept through final construction documents, we design mechanical systems that are buildable, not just theoretical. Engineering rigor and real-world constructability go hand in hand because a design is only as good as its execution.
Our involvement doesn't end at the drawing set. Our field teams stay hands-on throughout installation, working alongside general contractors and trade partners to turn plans into systems that perform exactly as intended.
We test, balance, and verify every system we install, staying engaged through startup and final completion because the job isn't finished until performance matches what we promised.
We provide upfront consulting, load calculations, system layouts, and equipment selection studies before any money is committed. It helps owners and general contractors make informed decisions early, when changes have the greatest impact.
HVAC, refrigeration, and controls expertise all live under one roof, allowing your project to move forward as one coordinated effort instead of multiple disconnected subcontractors.
Every system is designed with construction already in mind. Keeping feasibility and constructability at the forefront helps protect your schedule, budget, and long-term operational success.
We’re assembling a team of engineers, designers, and tradespeople who want to do more than fill a seat. We’re looking for people who want to help shape a design-build mechanical firm from day one. If that’s you, we want to hear from you.
Mechanical design for an 853,125 SF distribution facility developed by Scannell, engineered to support large-scale logistics and warehouse operations.
Mechanical design for a freezer tenant improvement, including refrigeration and climate-controlled storage systems for temperature-sensitive product.
Mechanical design for a Faith Technologies industrial facility, supporting production operations with dedicated HVAC and process systems.
Mechanical design-build supporting warehouse climate control and building systems for a wholesale distribution operation.
Mechanical engineering for an industrial tenant improvement build-out, supporting facility operations with updated HVAC infrastructure.
Mechanical design-build for a Supply One distribution facility, including a tenant improvement scope to support ongoing operations.
Mechanical design for a Faith Technologies production facility, engineered to support industrial manufacturing operations.
Mechanical design for a Faith Technologies industrial facility, supporting production operations with dedicated HVAC and process systems.
It’s a pleasure partnering with a firm that is as conscious as NMD about quality, cost, and schedule on our projects. They consistently go above and beyond to ensure our clients are thrilled with their buildings at the end of the day.
We partner with owners, architects, and general contractors nationwide to deliver turnkey HVAC, refrigeration, and controls solutions through one team, one process, and one accountable partner. Let's talk about your next project.
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