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Needing 10,000 gallons of hot water daily, Atlanta brewery chooses five-unit tankless system over steam boiler, slashing up-front costs
Looking to avoid the frustrating shutdowns of its previous system, Monday Night Brewing opts for a multiple-tankless solution. System redundancy keeps hot water flowing, even during maintenance, while prefabricated rack setup helps cut installed costs in half.
BY REGINALD GHOLSTON AND JOHN O’REILLY
The co-founder of Monday Night Brewing (MNB) — with close friends Jonathan Baker and Jeff Heck — enjoyed first-hand the benefits of tankless water heating technology as a child, growing up in Japan, where he lived for 14 years. Limited natural resources in that country inevitably puts a premium on energy efficiency. Meanwhile, limited household square footage favors the small-to-nonexistent footprint tankless routinely provides. (Many Japanese mount their water heaters outdoors.)
But, most important of all, with a properly sized tankless water heater, you never need worry about running short of hot water in the shower.
Returning to the U.S. as a teenager, Iverson and his family reverted to getting their hot water from a storage-tank water heater. “I quickly learned that, if you’re unlucky enough to be the third or fourth person taking a shower every morning, you’re going to be cold,” he recalls. “I could never understand why Americans just didn’t switch to the better technology found in every Japanese home.”
Needed: Very hot water… and lots of it
Located in the southwest section of the city, the new MNB barrel-aging and souring facility consumes approximately 10,000 gallons of hot water daily in its beer-making processes. For example, water at a temperature of 150°F is combined with barley and hops to produce an enzymatic reaction that yields a sugar. This watery “mash” then is mixed with yeast to become alcohol.
Elsewhere inside The Garage, 180°F water is used to steam and sterilize its collection of wine, whiskey and rum barrels that give the various brews their distinctive flavors. “This sanitation of the wood is a critical piece of the operation,” explains Iverson. “We could do chemical sanitation of our equipment, but the best way to ensure a clean and sterile environment is hot water. And by ‘hot water,’ I mean no less than 180°F.”
The solution to these demanding hot-water needs came from Noritz America in the form of five, high-efficiency (95 percent) water heaters. The Model NCC1991-DV condensing units were pre-engineered, prefabricated and pre-plumbed with a system controller as a single, integrated package on a metal rack before being shipped intact to Atlanta — resulting in a major savings in installation labor, as we will see. Their combined maximum inputs total 999,500 Btu/hour, meeting not only the brewing and sanitation requirements of the beer production process, but also the general hot-water service needs of the rest of the 22,000-square-foot structure.
Beyond a continuous supply of hot water, two other criteria were equally influential in Iverson’s decision to install tankless: 1) system redundancy to keep the beer flowing and, believe it or not, 2) significantly lower, up-front purchase costs.
No more waiting
All of which led Iverson to contemplate the tankless alternative for the new brewery.
While attending a brewing industry conference, Iverson spoke with a fellow brewmaster about MNB’s plans for The Garage and the need for a more reliable source of hot water. Iverson’s new friend mentioned that a number of smaller breweries had taken to experimenting with tankless technology, jerryrigging two or more units together to get the hot water they needed.
Iverson didn’t care for the idea of “hacking” water heaters together to build a makeshift system, but he was intrigued enough to begin researching the possibilities of connecting multiple units to generate the hot water he needed. He subsequently learned that Noritz offered a prefabricated system, including a central controller, and immediately thought: That’s exactly what we need.
“I contacted the manufacturer’s headquarters in California, got with someone in their technical department and walked them through my sizing calculations for the maximum flow rate” of approximately 16 gallons per minute at 180°F. Working back from that metric, Noritz tech support helped Iverson determine that he needed a 1 million-BTU system, with five heaters connected in a series, he says.
Throughout his work with the manufacturer, Iverson and his colleagues never wavered from their conviction that tankless was the right choice, according to Iverson. “Our lone concern was: What happens if a sudden need for an unusually high volume of hot water arises? So we devised a creative way to deal with that in the form of a 150-gallon holding tank,” says Iverson. This backup tank is not absolutely required, but it does provide reassurance and peace of mind.
System redundancy at an affordable price
Prefabrication of the rack system accounted for some of the tank-versus-tankless cost gap, thanks to a dramatic reduction in labor time and expense. Compared with tankless, a steam boiler is a far more complicated, labor-intensive install. “Much of the time and expense is the steel pipe needed to connect the boiler to equipment, all of which must be insulated,” Iverson explains. “Then there are all the relief valves and other safety devices required by code. Steam boilers must also undergo regular inspections by the state, another major cost.”
It’s not a perfect apples-to-apples comparison between a steam boiler and tankless, he admits, but he harbors no doubt about the more attractive economics of the latter. “We should have lower gas bills simply because tankless is on-demand: We won’t be heating water all the time, but only when we need it.” This benefit is somewhat muted by the comparatively low natural gas prices right now, admits Iverson. But “it was the up-front savings in equipment and labor that tipped the scales in favor of tankless.”
The other major attraction for MNB was system redundancy, which should all but eliminate downtime during servicing situations. “Shutdowns are a big negative in any brewery,” notes Iverson, who says the occasions when all five will operate simultaneously should be few. “That means, when maintenance for one unit is required, one or more of the other four will remain online, so we can continue brewing beer.”
Plug-and-play eases installation
As for the controller, the primary concern was to connect each of the five pre-installed cords to its appropriate unit with no wires hanging slack. Otherwise, this prefabbed piece, which can be hung virtually anywhere nearby, typically takes only a half-hour to install.
The gas lines and vent runs were another matter. Owner David Hardegree of Hard-Cas Mechanical LLC (Winder, GA) and project manager Tim Casper installed 3,000 feet of two-inch black iron pipe at The Garage, to service various appliances, including HVAC equipment, 12 gas lamp posts and a fire pit for brewery guests, plus the tankless setup, which needed 1,000 feet by itself. Describing the installation as a “massive undertaking,” Hardegree estimates the gas-pipe installation spanned a week.
Each tankless water heater is vented separately with a 20-foot vertical stack of four-inch Schedule 80, high-pressure PVC pipe. Each stack consisted of a pair of 20-foot lengths connected with a Schedule 40 PVC fitting. The five runs merge at the roof into a specially prefabbed, 3” x 3” x 3” wye fitting. The venting terminates in a five-foot, vertical length of concentric piping, five inches in diameter. The inside pipe, which delivers makeup air, is encased in a slightly wider pipe that removes the exhaust.
The venting setup required two days, says Hardgree, “including a day on a scissor lift, after the manifold was set, to rough-in most of the pipe; and a second day, to top it all out on the roof.”
But whatever the challenges of the gas and vent runs, Hardegree has only compliments for the tankless rack system, which had to be carefully squeezed into The Garage’s 8-foot-square mechanical room.
“It was a tight fit, no question,” he remembers, “but once the rack was in place, the heaters themselves were ready to go. If we had to mount each of them on the wall, we might’ve needed another week. Prefabrication made the installation so much easier — whoever came up with the idea of that rack is a genius!”
Return to their roots
“We were all white-collar dudes doing our day jobs,” says Iverson, “but always pointing to what we’d be brewing come Monday night. Instead of dreading Mondays, we actively looked forward to them.”
But after opening the “West Midtown” brewhouse on Trabert in 2011, their hobby and passion quickly transformed into a major business enterprise with all the pressures and complications that accompany rapid growth. The focus inevitably turned to making “big batches of beer and improving our efficiencies,” says Iverson. Business success certainly has its satisfactions. But the founding trio found themselves drifting away from their original intent: To foster fun, innovation and, above all, “deepening human relationships over some of the best beer in the country.”
Thus, The Garage is in many ways a return to the founding spirit of Monday Night Brewing, Iverson explains. Built along one of the country’s largest urban renewal projects, the new Westside Beltline trail, it features a public tasting room with a patio for touring guests, plus an adjacent “urban orchard” for brewing beers the old-fashioned way, via wild fermentation. Most important of all, there’s simply more room under roof.
“We have all this additional space for multiple barrel-aging and souring rooms to experiment with the sort of specialty beers that have won us so many awards,” says Iverson. “Originally, the idea seemed a little crazy, but viewed within the context of our main mission, it clearly was a step we had to take.”
In that regard, high-performance tankless technology is a good fit for an innovative enterprise committed to excellence through creative experimentation. You cannot brew beer without lots of hot water; and you can’t brew “some of the best beer in the country” without a first-rate and dependable water heating system.
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NORITZ AMERICA CORPORATION, a subsidiary of Noritz Japan, has corporate offices in Fountain Valley, Calif., and Atlanta, offering a full line of tankless water heaters to meet the hot water demands of residential and commercial applications. Noritz supports its products with a national network of skilled representatives and employees who are committed to providing the finest products and services to our communities by helping consumers live in a more comfortable, efficient and healthy lifestyle. For more information on Noritz America and the entire line of Noritz’s ENERGY STAR® tankless water heaters, please call (877) 986-6748 or visit our website at www.noritz.com.
For editorial assistance, contact John O’Reilly at O’Reilly DePalma;