Get the Full Array of Boiler Benefits
Reliable heat is non-negotiable in schools, healthcare facilities, commercial properties, and government buildings. When space temperatures swing or equipment goes down, the consequences are immediate—lost instructional time, compromised patient comfort, disrupted operations, or interrupted public services. At the same time, energy budgets and staffing levels are under constant pressure. A modern boiler plant has to do more than “run.” It needs to stay online through failures, operate efficiently at real-world loads, and be serviceable without drama.
That’s precisely what the Riello Array 2.5 is built to deliver. Array 2.5 is a pre-packaged, modular condensing boiler plant engineered around redundancy, deep modulation, and long-term lifecycle savings in a compact mechanical-room footprint.
First, THE SYSTEM’S modular architecture eliminates single points of failure.
Array plants include multiple independent boiler modules, and each module has its own combustion chamber, heat exchanger, and circulating pump. If a component fails, it doesn’t take the plant down—the remaining modules continue to carry load. That means buildings stay conditioned while repairs are made, instead of forcing a full shutdown and emergency response.
Second, Array 2.5 is designed for efficiency
where most facilities actually operate: partial load. With a 40:1 turndown ratio, modules can match output precisely to real-time demand instead of cycling on and off. Low-fire operation stabilizes supply temperatures, reduces short-cycling wear on ignition and combustion components, and cuts natural gas consumption during long low-load periods like shoulder seasons or off-peak hours.
Third, as a condensing platform
Array 2.5 captures the latent heat that conventional boilers lose up the stack. By reclaiming flue energy and returning it to the loop, the plant improves seasonal efficiency and reduces fuel spend over its service life—especially in facilities with long operating hours or variable occupancy.
Array 2.5 also uses advanced cascading logic to optimize how modules work together.
The controls stage only the number of modules needed to meet demand and keep active units operating in their most efficient range. Runtime is rotated to balance wear across modules, improving overall reliability and extending equipment life.
On the mechanical side, performance is enhanced by a dual-helical-coil heat exchanger with a free-floating design that reduces internal stress and scaling. Maintenance is where Array 2.5 pays off year after year. Annual cleaning and checkups are straightforward and technician-friendly, with accessible components and simple procedures that aren’t physically demanding. Most importantly, modules can be serviced individually without shutting down the entire plant, reducing overtime, emergency calls, and occupant disruption. A clear touchscreen interface supports faster troubleshooting with intuitive alarms and diagnostics.
Finally, Array 2.5 is built for compliance!
Ready for what’s next, including UL-1738 venting requirements for condensing boilers in regions adopting new standards in 2025.
Get The Full Array of Benefits with Mechanical Resource Group.
At Mechanical Resource Group, we stock Riello Array 2.0 and 2.5 boilers for same-day pickup or delivery to keep projects moving. If you need a boiler plant that delivers redundancy, real-load efficiency, simplified service, and future-ready performance, Array 2.0 & 2.5 is the full package.
Contact our parts team today at partscounter@mechanicalresource.com for competitive pricing and more information.