Lauren McBride
Mechanical Design Engineer
Charlotte, North Carolina
I design HVAC systems for commercial buildings, mostly healthcare and large mixed-use projects. A lot of my job is balancing what works in theory with what contractors can actually build and maintain without calling someone at 2am six months later. I spend way too much time reviewing submittals, arguing about duct routing, and explaining why “value engineering” usually just means we’ll be revisiting the same issue later.
Mechanical
Mechanical Systems
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Professional Background
11 years
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Technical Interests & Expertise
Revit MEP
AutoCAD
HVAC Load Calculations
BAS Coordination
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I keep seeing supply air temp reset sequences that look great in energy models but fall apart in our humidity. We push SAT up to 62-65°F to cut reheat, then latent removal tanks and zones drift to 60%+ RH. Operators crank minimum OA or force colder SAT, and we end up worse than before.What’s worked better for us: tie SAT reset to outdoor dewpoint and return RH. If OA dewpoint is above ~55°F, cap SAT at 55°F and let reheat do its job. Only allow SAT to float up when OA dewpoint drops and return R...
I’ve started leaning on a small desktop printer for quick one-offs: sensor standoffs, BAS cable guides, oddball brackets the catalog never quite has. For field fixes, it beats waiting a week for a custom sheet metal tab. But I’ve also seen a few “clever” prints turn into soft noodles next to a hot AHU or crack from vibration.PLA doesn’t belong anywhere near a supply fan motor. PETG survives better but still creeps under load. Nylon or CF-nylon has been solid, and I’ve had good luck with heat-set...
Ran into a nasty one on a small office retrofit: contractor swapped in non-barrier PEX on a heating hot-water loop to save time. Three months later we had black magnetite sludge, pump seal failures, and a fouled heat exchanger. Controls alarms everywhere because delta-P sensors drifted as strainers loaded up. Everyone chased setpoints, but the root cause was oxygen diffusion through the tubing feeding every ferrous part a steady dose of corrosion.Lesson learned: do not rely on “closed system” an...
Started using 3D prints for quick saves in mechanical rooms: sensor standoffs, oddball actuator brackets, wire guides. They fit the geometry we missed in Revit. Then the AHJ and facility team walked the job. Return plenums needed UL 2043. PLA cracked from vibration. ABS softened near hot piping. A nylon bracket crept and dropped a temp sensor into the airstream. Lesson learned.My rules now: anything in airstream or plenum is metal or a documented UL 2043 polymer. Near boilers, rooftops, dish roo...