The Nesta range offers high-output floor-standing condensing boilers, available in model range 120–300 kW. Designed for residential and commercial projects, they provide dependable heating for both new installations and renovation works. Despite their compact 0.5 m² footprint, these boilers deliver impressive power and performance, making them ideal for plantrooms where space efficiency is crucial. Built with AIC’s proven Fire Tube stainless steel heat exchanger, Nesta ensures long-term reliability, high efficiency, and simple maintenance through its self-cleaning flue ways.
Equipped with an advanced internal control unit, Nesta boilers can manage cascades of up to six units across direct and mixed circuits, including DHW production. Remote monitoring and control are enabled via Ethernet or GSM connectivity, ensuring convenience and flexibility for building managers and installers. With robust construction, a compact design, and sustainable performance, the Nesta range represents a perfect balance of craftsmanship, innovation, and practicality for modern heating needs.
2000–5000 m2
5000–15000+ m2
At the core of Nesta boilers lies the Fire Tube heat exchanger, crafted from premium stainless steel alloys to guarantee durability, corrosion resistance, and long service life. Its vertical design enables natural self-cleaning through condensates, ensuring consistently high performance and reducing maintenance needs.
The carefully engineered geometry of the flue gas tubes maximizes surface area and water capacity, resulting in optimal condensation, temperature stability, and very high efficiency. This globally proven technology combines innovation with reliability, making Nesta one of the most efficient and dependable boilers in its class.
Thermal efficiency
up to 108%
Wide modulation ratio
up to 10:1
NOx class
6
Operating pressure
up to 6 bar
Nesta boilers are engineered with a robust frame and removable aluminium panels that combine durability with reduced weight, making them among the lightest options in their class. This thoughtful construction ensures reliable strength while greatly simplifying handling and positioning, especially in rooftop plantrooms or areas with limited access.
With a compact footprint of just 0.5 m², every model in the Nesta range is designed to pass through a 70 cm wide doorway, enabling quick and unobtrusive installation. As a result, Nesta delivers long-lasting efficiency, practicality, and cost-effectiveness, making it the perfect solution for space-conscious projects with demanding heating requirements.
Compact dimensions
70 cm doorway fit
Small footprint
0.5 m2
Reduced maintenence
Self-cleaning flue ways
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 boilers are centred around a Fire Tube heat exchanger, engineered from the specially selected steel alloys. This construction imparts durability, reliability, and enhanced resistance to corrosion and oxidation, ensuring long-lasting performance and serviceability.
The Fire Tube design of the Nesta 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's 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 boilers are centred around a Fire Tube heat exchanger, engineered from specially selected stainless steel alloys. This construction imparts durability, reliability, and enhanced resistance to corrosion and oxidation, ensuring long-lasting performance and serviceability.
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 Boiler boasts a sophisticated, yet user-friendly controller, equipped with weather regulation functions, suitable for end-users, engineers, and installers alike. In its standard programming mode, the controller can manage up to three direct heating circuits. With the addition of an extension, it is capable of overseeing an additional three mixed circuits and a circuit for DHW production.
The inclusion of an external storage cylinder gives the controller an anti-Legionella function, and it is equipped to manage up to six boilers in a cascade formation, with optional connectivity for regulation and remote control. By incorporating the optional WEB Server Module, the Nesta Chrome boiler, cascade, and entire heating system can be monitored and controlled remotely via either a GSM router or Ethernet network. Furthermore, the AIC condensing boiler range can be regulated through either an analogue 0-10 V signal or a Modbus RS485 digital signal.
*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.