Single-Coil Water Heater
High Heat Transfer, Long-Lasting, and Efficient Hot Water Solution
FENNEX Single-Coil Boilers are designed to transfer energy from a single heat source—such as a boiler, combi boiler, heat pump, or solar energy—to domestic hot water with high efficiency. Thanks to their high heat transfer performance, durable construction, and ease of maintenance, they offer a reliable and economical solution for the hot water needs of modern buildings.
Key Features of FENNEX Engineering
Bottom-Mounted Coil Design
FENNEX’s unique design positions the coil at the very bottom of the tank, ensuring that domestic hot water is heated starting from the lowest point of the tank. This prevents the formation of unheated zones within the tank while maximizing the utilization of the available heat source.
Single-Piece, Replaceable Coil
The fact that the coil is a single, removable, and replaceable unit simplifies maintenance and service procedures. In cases of scaling or potential malfunctions, the coil can be replaced without requiring the entire tank to be replaced. This design simplifies maintenance processes while helping to reduce long-term operating costs.
Homogeneous Heating and Hygienic Use
The heating principle, which begins at the bottom of the tank, helps ensure that the water heats more uniformly. Preventing the formation of cold zones where water might remain stagnant for extended periods helps reduce the risk of bacterial growth—such as Legionella—thereby creating a more hygienic hot water system.
Energy Efficiency and Long Service Life
Thanks to their coil structure, which provides high heat transfer, and their engineering-focused design, FENNEX Single-Coil Boilers help reduce energy losses and contribute to the system’s efficient operation. Their durable construction and ease of service offer the advantage of long-term, reliable use.
Key Technical Advantages
| Feature | Benefits It Offers |
| High-Temperature Surface Area | Thanks to its large heat transfer surface, it helps the water heat up faster and reduces the wait time for hot water. |
| Modular Design | In the event of a malfunction or scaling, it allows only the affected coil to be replaced, thereby eliminating the need to replace the entire tank and reducing maintenance costs. |
| Advanced FEN-X Plus Defender Coating | The specially developed interior surface coating offers high resistance to cracking and peeling during thermal expansion compared to enamel coatings, ensuring long-lasting use. |
| CFC-Free Insulation | Thanks to its eco-friendly, high-density insulation structure, it reduces heat loss and helps maintain the water's temperature for a long time. |
Applications
FENNEX Single-Coil Water Heaters are an ideal solution for applications requiring efficient and uninterrupted hot water supply from a single heat source, such as single-family homes, villas, office buildings, and small-scale businesses.
With high heat transfer performance, a replaceable coil design, and advanced insulation features, they provide an efficient, economical, and long-lasting hot water solution for a variety of usage needs.
FENNEX
“High performance from a single source—the FENNEX standard.”