Rooftop unit change-outs
Crane day to commissioning — curb adaptation, refrigerant piping, electrical, controls integration, and start-up. We coordinate the crane, the roof inspector, and the AHJ.
Service
Project Support
Design-build, retrofit, and equipment-upgrade projects delivered by tradespeople who know the install — and the service that comes after. From a single rooftop change-out to industrial, oil & gas, and marine mechanical work.
What we deliver
Projects, sized to your scope.
We don't chase mega-projects we can't staff or one-day jobs that lose money. Our sweet spot is the work that's too complex for a handyman and too operational for a generalist GC.
Chiller plant retrofits
End-of-life chiller replacement, capacity upgrades, condenser water redesigns, VFD additions, and primary-secondary conversions.
Marine & oil-and-gas
Vessel HVAC and refrigeration, offshore support systems, and refinery process cooling — equipment specified and installed for salt air, vibration, and hard duty cycles.
Controls upgrades
Pneumatic-to-DDC conversions, head-end replacements, and BAS integration — coordinated with the mechanical work so the system actually runs when we're done.
Tenant fit-outs
HVAC and controls for tenant build-outs — sized to your space plan, sequenced around your construction schedule, commissioned to your standards.
Energy retrofits
Variable speed drives, economizer additions, heat recovery, and controls optimization — with measurement & verification built in so you can prove the savings.
Why Optimum for projects
The crew that designs it, installs it, and keeps it running.
Most mechanical projects suffer the same handoff problem: design firm hands drawings to install crew, install crew hands a system to a service company, service company spends two years untangling assumptions nobody documented. We close that loop.
Our install foremen sit with our service techs. The job that hits the field — whether it's a rooftop unit uptown or a chiller on a river-parish plant — has been pressure-tested by the people who'll service it. The system you operate matches the drawings, because we made both.
- Design-build and design-assist delivery
- Single point of accountability — design through warranty
- Industrial, oil & gas, and marine project experience
- Coordinated with our own service team — no handoff gap
- Permits, inspections, and AHJ coordination handled
- M&V baked in — you can prove the savings
Have a project in mind?
Let's scope it together.
Send us your scope (or just the symptoms — "the chiller is at end-of-life and we're not sure what to do next" is a great starting point). We'll walk the site, develop options, and come back with a proposal.