Twelve Modular Cooling Towers Installed in Four Days at 420,000-Unit Plant

A Midwest automotive plant that builds 420,000 vehicles a year replaced its entire cooling tower bank in four days, using 12 factory-built modular units instead of a field-erected system that would have taken more than 60 days to assemble on site.

The unnamed OEM undertook the swap as part of a broader modernization program covering retooling, new equipment and advanced manufacturing tech. The constraint was timing, not budget theater: demolition couldn't start until December, and site prep, installation and commissioning all had to finish by April. That's a four-month window in a plant that can't politely stop building cars.

The OEM worked with ElitAire LLC, a Michigan-based mechanical contractor, and weighed two paths: replace the six aging field-erected towers with more of the same, or go modular with units built off-site by Baltimore Aircoil Co. A second decision ran in parallel — stick with gear-driven fans or move to direct-drive.

The company chose 12 BAC Series 3000 modular towers fitted with ENDURADRIVE direct-drive fan systems, set on the plant's existing concrete cold-water basin. Reusing the basin mattered; it kept civil work to a minimum at an operating facility.

How fast is four days, really?

Per BAC's figures, each module went in over roughly three hours. Twelve modules, four days. The comparable field-erected route: more than 60 days of on-site assembly, according to the manufacturer.

Hassan Alhashim, lead project engineer at ElitAire, put it plainly: "Instead of taking 2-3 months to erect site-built towers, the modules were each installed in about 3 hours, and the entire process from demolition to completion was accomplished well within the four-month window."

For context: the modular approach compressed what's normally a quarter-year construction job into about 3% of that time — for the installation phase alone. Demolition and commissioning still occupied the rest of the window.

Why off-site builds change the risk picture

Building the modules off-site let the OEM complete visual inspections and factory acceptance testing before the equipment ever reached the plant. That matters in two ways:

• Faults surface at the factory, not on a live production site with a shutdown clock running
• Construction labor and crane time at the operating facility drop sharply, shrinking the downtime exposure

The takeaway is simple: the schedule risk moved from an unpredictable job site to a controlled factory floor.

What to watch next

BAC's 60-day figure for field-erected assembly is the manufacturer's own claim, and plant-specific variables — basin condition, crane access, weather — will move it in either direction. Treat it as directional, not gospel. Direct-drive fans also carry a maintenance story: fewer moving parts than gear drives, which typically means fewer lubrication and alignment jobs over the fleet's life. Watch for follow-on installations at other high-volume plants, and for the OEM — still unnamed — to confirm whether the December-to-April window held without production loss.

Four days for twelve towers. The concrete basin stayed; the schedule risk didn't.