The Nesta Plus range delivers high-efficiency floor-standing condensing boilers with outputs from 280 to 1260 kW. Engineered for demanding commercial and industrial projects, these boilers provide reliable heating in both new installations and renovation works. Despite their compact footprint, Nesta Plus units offer exceptional power, making them ideal for plantrooms with limited space. Built around AIC’s proven stainless steel Fire Tube heat exchanger, they combine long-term durability with excellent thermal efficiency, supported by self-cleaning flue ways that simplify maintenance.
Equipped with advanced control systems, Nesta Plus boilers manage cascades of up to six units, covering multiple direct or mixed circuits including DHW. Connectivity via Ethernet or GSM (with the WEB Server Module) enables full remote monitoring, while self-diagnostics streamline servicing and reduce downtime. With a robust design, compact size, and outstanding operational stability, the Nesta Plus is a powerful and sustainable solution for modern high-output heating requirements.
At the heart of the Nesta Plus lies the Fire Tube heat exchanger, manufactured entirely from stainless steel for maximum efficiency, durability, and resistance to corrosion. Its vertical design enables condensates to naturally clean the flue ways, ensuring consistently high performance with minimal maintenance.
The carefully engineered geometry of the flue gas tubes maximizes surface area and water capacity, guaranteeing high efficiency, stable temperatures, and optimal condensation. With completely immersed flue gas tubes and high heat transfer coefficients, Nesta Plus boilers deliver very high seasonal efficiency without risk of oxidation. Proven through years of global application, this technology ensures lasting reliability, peace of mind, and excellent returns on energy savings.
Thermal efficiency
up to 108%
Reduced maintenence
self-cleaning flue ways
NOx class
6
Operating pressure
up to 6 bar
Nesta Plus stands out with its exceptionally high water content of up to 560 litres, which provides outstanding thermal stability, reduces pressure drops, and ensures balanced performance across both heating and flue gas circuits. This design minimises the risk of overheating and significantly reduces cycling, protecting the boiler and extending its service life.
Complementing this is an advanced 10:1 modulation ratio that continuously adapts boiler output to real-time demand. By matching power precisely to system requirements, Nesta Plus achieves higher seasonal efficiency, lower gas consumption, and improved comfort. Together, these features make Nesta Plus one of the most stable, efficient, and reliable floor-standing condensing boilers in its class.
High water content
up to 560 litres
Wide modulation ratio
up to 10:1
With in-house production facilities in Poland, full assembly lines, and a modern CNC machine park, we offer full process control from tube forming to final testing. Our engineering is supported by advanced CFD and FEA simulations and verified in our on-site thermal laboratory. Every product undergoes rigorous quality control and complies with ASME, PED, and SELO standards. In-house manufacturing ensures performance consistency, thermal efficiency, and seamless integration with HVAC and industrial systems.
The Nesta Plus boilers feature a tried and tested Fire Tube design heat exchanger, known for its efficacy and reliability. Comprised entirely of stainless steel, these heat exchangers excel in thermal efficiency, durability, and resistance to corrosion. The ingenious fire tube stainless steel heat exchanger efficiently extracts maximum heat in a compact form. Its corrosion-resistant surface guarantees uninterrupted condensing efficiency, leading to reduced maintenance costs and an extended product lifespan.
The Fire Tube design of the Nesta Plus heat exchanger is a hallmark of our product, a market-proven technology that has been manufactured and distributed globally for many years. Our dedication to innovation and advancement in design has resulted in the creation of one of the most efficient boilers in its class, a testament to our unwavering commitment to excellence.
The geometry of Nesta Plus heat exchanger and flue gas pipes are engineered to provide ample heat exchange surface area and water capacity, ensuring high efficiency and optimal condensation, as well as temperature stability. The outcome of these design considerations is a device that is marked by exceptional efficiency, durability, and reliability, offering users peace of mind and confidence in its performance.
The Fire Tube exchanger is self-cleaning thanks to the condensates that run from the top to the bottom of the vertical flue pipes, designed in such a way to keep the internal surface of the pipes clean, guaranteeing constant high performance over time and considerably limiting maintenance interventions.
The completely immersed flue gas tubes of the Fire Tube exchanger, with their exclusive design and high heat transfer coefficient between water and flue gasses, ensures an optimal counter-currenent movemment over the entire length of the exchanger. This particular design allows AIC condensing boilers to reach very high efficiency, without the risk of oxidation.
The Nesta Plus boilers feature a tried and tested Fire Tube design heat exchanger, known for its efficacy and reliability. Comprised entirely of stainless steel, these heat exchangers excel in thermal efficiency, durability, and resistance to corrosion. The ingenious fire tube stainless steel heat exchanger efficiently extracts maximum heat in a compact form. Its corrosion-resistant surface guarantees uninterrupted condensing efficiency, leading to reduced maintenance costs and an extended product lifespan
The internal control unit of the Nesta boilers allows for management of cascades up to 6 boilers in a series of direct and mixed circuits and additional DHW circuit, with boiler management and alarm. The Nesta is also equipped for remote management via ethernet network or GSM router.
The Nesta Plus incorporates advanced connectivity features, enabling remote boiler management for enhanced control and convenience.
Through web server connectivity, the Nesta Plus offers seamless remote management capabilities, allowing efficient monitoring and control of the boiler. The integrated control system provides valuable self-diagnostics, optimising periodic servicing and assisting engineers in identifying and addressing issues. With its connectivity options, the Nesta Plus simplifies system management and ensures optimal performance.
*Option or with additional accessories
The Fire Tube exchanger is self-cleaning thanks to the condensates that run from the top to the bottom of the vertical flue pipes, designed in such a way to keep the internal surface of the pipes clean, guaranteeing constant high performance over time and considerably limiting maintenance interventions.