Vitomax LW

Your local Viessmann sales partner will provide you with individual advice.

Low pressure hot water boiler

Output signal range: 0.65 - 22.0 MW

High efficiency

With more than 95.5%

H2 Readiness

Works with hydrogen up to 100%

Wide range of fuel options

Such as hydrogen, natural gas, fuel oil, heavy fuel, biogas, bio-oils and many others.

Working pressure

6, 10, 16 bar

Corner posts arranged in pairs

Reduces stress in the boiler

Optimal geometry of flame tubes

For clean combustion

Maximum long intervals between inspections and easy maintenance

With sufficient openings for inspection and access

For use in the manufacturing industry

Can be used in a wide range of industries

Vitomax LW low-pressure hot water boilers with a capacity from 0.65 to 22.0 MW for commercial applications

Hydrogen up to 100 percent

In chemical production, such as chlorine production and other industrial processes, much of the hydrogen gas is wasted and released into the atmosphere. Vitomax boilers, which can operate on 100% hydrogen with the appropriate burner, offer a cost-effective and efficient solution. They also prevent significant amounts of climate-damaging _CO2 emissions .

Product Features

Energy-efficient and clean heat supply, as well as high operational reliability and system availability, are key requirements for district heating systems in large buildings and industrial facilities. Vitomax LW are low-pressure hot water boilers for flow temperatures ≤ 110°C and permissible operating pressures of 6, 10, or 16 bar.

The three-pass boiler features low combustion chamber loading, clean combustion, and low nitrogen oxide emissions. When operating on gas, nitrogen _{oxide emissions for Low}_NOx series boilers are less than 70 ^mg/Nm³ ; when operating on oil, they are less than 150 ^mg/Nm³ .

The low-load, compact design ensures good natural circulation and reliable heat transfer. As with the Vitomax HW, no additional boiler pumps are required, significantly simplifying the hydraulic connection. The optimal design of the heating surface and smoke tubes ensures a low pressure drop on the hot gas side.

_{All Vitomax LW low-pressure hot water boilers are suitable for combustion of up to 100% hydrogen, subject to our H2} framework conditions .

New district heating plants for industrial and commercial facilities often need to be ready for operation quickly to ensure scheduled heat supply. This is especially true during refurbishments or modernizations, when the system is being replaced during ongoing operation. In these cases, the system operator can rely on proven and reliable Viessmann technology.

In industrial/commercial boiler rooms, the Vitomax LW low-pressure hot water boiler offers a high level of planning and calculation reliability. Along with guaranteeing the highest quality and flexibility, all components are carefully matched, including pre-installed safety equipment for maximum temperatures of 110°C. Optional accessories include flue gas/water heat exchangers for use in non-condensing and condensing technology, increasing boiler efficiency to over 95.5 percent. Return temperature boosters, pressure maintenance systems, and flue gas components are also available.

Vitomax hot water boilers receive high marks for continuous operation due to their easy maintenance, thanks to a wear-resistant, water-cooled burner entry point and a refractory-free rear reversing chamber, available upon request. This eliminates the need for refractory lining drying, significantly reducing commissioning and maintenance time. The boiler’s supporting cover simplifies installation and maintenance, and protects the thermal insulation from damage.

Hydrogen up to 100%: comparable _NOx values as fuel oil/natural gas
Fuel oil (EL), _NOx emissions (possibly < 150 ^mg/m3 flue gas)
Heavy fuel oil, fuel oil 100
Natural gas, _NOx emissions (possibly < 70 ^mg/m3 flue gas)
And many others, such as biogases/bio-oils or animal fats.

Food industry
Fertilizer industry
Building materials industry
Paper industry
Beverage production
Chemical industry
Pharmaceutical industry
Hospitals
Oil refineries
Local and centralized heating networks

Sample diagram; actual boiler may vary depending on order.

Modularity – variations at the hardware level

Burner entry point:
a) Lined (standard)
b) Water cooled – maintenance free/wear resistant (optional)
Boiler cover:
a) Without boiler cover / round insulation (standard)
b) Hinged boiler cover prepared for mounting on a platform (optional).
Modular work platform (optional – only in combination with boiler cover)
Boiler support :
a) Cross plates (standard < 14 t boiler weight)
b) Cross plates with longitudinal I-beams (optional < 14 t boiler weight / standard > 14 t boiler weight
c) Full I-beam version (optional).
Flue gas collector with rear outlet:
a) round design (standard)
b) rectangular design (optional)
Integrated heat exchanger and flue gas collector:
a) Non-condensing heat exchanger (optional)
b) Condensing heat exchanger (optional)
c) Flue gas collector with round outlet – combination of non-condensing and condensing heat exchangers possible.