Hot water cylinders to suit any requirement

Sizing is a crucial factor when selecting the right cylinder. The exact size depends not only on the number of occupants, their individual consumption habits, and the actual hot water demand. Besides the overall heating capacity of the system, another important factor is whether it will only provide hot water or also domestic hot water. If the overall heating capacity is relatively low, it is recommended to purchase a slightly larger cylinder. Always consult your Viessmann partner for advice on this matter. Our partners are familiar with a wide range of different hot water cylinders. Vitocell offers cylinders with capacities ranging from 130 to 1,000 liters. This means these products are suitable for use not only in detached houses but also in multi-family buildings or other buildings with high hot water demand. This also includes commercial or municipal buildings.

To avoid unnecessary long pipes, DHW cylinders are installed in close proximity to the boiler. The various options, as mentioned above, are horizontal, adjacent to the boiler, and beneath the boiler. The DHW cylinder should be selected based on the available space, DHW needs, and individual requirements. For example, the Vitocell 100-W is an ideal solution for relatively low DHW needs in a small footprint, as this model can be installed beneath a wall-mounted boiler (e.g., the Vitodens 300-W gas condensing boiler) to save space and holds up to 150 liters of water. Full-perimeter thermal insulation ensures convenient and economical DHW heating throughout a detached house.

Related models of DHW cylinders include the Vitocell 100-L , Vitocell 100-V , and Vitocell 300-V . As the name suggests, they are located directly next to the boiler. These are cylindrical, floor-standing DHW cylinders equipped with an indirect coil. This coil extends to the very floor of the cylinder, allowing the entire contents of the cylinder to be heated.

Viessmann’s product range also includes horizontal DHW cylinders: the Vitocell 100-H and Vitocell 300-H . These are particularly robust, allowing for the installation of a suitable water heater. There is ample space above them for a gas condensing or oil-fired boiler, for example.

Viessmann hot water cylinders heat hot water indirectly through an indirect heating coil. Small storage or instantaneous water heaters are also available, which heat water directly. If you’re looking for a small storage water heater of this type, Viessmann offers Vitotherm electric storage water heaters, which heat water using electricity. You heat only the amount of hot water you need—right where you need it. Purchasing a small storage water heater is especially practical in areas where a centralized hot water supply is unavailable or unnecessary due to low demand.

If hot water demand is particularly high, the Vitocell 100-V floor-standing hot water cylinder is the ideal solution. This enameled Viessmann hot water cylinder is available in two colors and has a capacity of 160 to 950 liters. Multiple hot water cylinders can be combined to form a cylinder block if needed. Depending on the model, the Vitocell 100-V is particularly suitable for heating hot water in conjunction with heat pumps or condensing boilers, making it a virtually universal solution.

Viessmann storage water heaters for heating systems can also be equipped with a separate heat exchanger kit (Vitotrans 222). When combined, they form a cylinder loading system for heating domestic hot water. This is particularly useful during peak loads, for example, when high water withdrawal rates (draw rate) and varying reheat times need to be temporarily covered. Cylinder loading systems are also preferred for operating heating systems that require low return temperatures, such as condensing boilers. The Vitocell 100-L from Viessmann is the perfect DHW cylinder for these and other applications. It offers impressive features: precise cylinder heating to the required temperature, even with modulating flow temperatures, and easy installation thanks to removable thermal insulation (500 liters and above).