Caldera mural de condensación a gas Vitodens 111-W VIESSMANN - Q-Tech ®
Caldera mural de condensación a gas Vitodens 111-W VIESSMANN - Q-Tech ®
Caldera mural de condensación a gas Vitodens 111-W VIESSMANN - Q-Tech ®
Caldera mural de condensación a gas Vitodens 111-W VIESSMANN - Q-Tech ®

Viessmann Vitodens 111-W condensing boiler with integrated 46L storage tank

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Your guarantees

  • Rights intact: 14 days of withdrawal from receipt for most products—subject to the legal exceptions you will see below, such as goods made to your specifications—and a 3-year legal warranty of conformity, under the terms of the TRLGDCU.
  • Conformity with the description: we guarantee that the equipment will correspond to the published technical description and what one could reasonably expect from it (arts. 115 et seq. TRLGDCU). Images and videos are for guidance only: the manufacturer may supply a more recent revision of the product or introduce minor aesthetic, packaging, or firmware changes, without this constituting a lack of conformity as long as the described characteristics and performance are maintained.
  • Traceability that also protects you: we document the condition, serial number, and seal of each piece of equipment upon shipment, and we video-record the opening of returns; this is your proof of the condition in which the goods were delivered.

Responsible use and your part

  • If you are thinking of returning it, keep it as you received it: without installing or activating it, with its seals, accessories, and packaging intact. This is how to ensure a full refund, without deductions.
  • Handling that exceeds inspection reduces value: handling the equipment beyond what is necessary to verify its nature and operation may result in a real, assessed, and case-by-case justified deduction (art. 108.2 TRLGDCU), never a fixed percentage. In particular: activating or registering the serial number, linking it to a manufacturer's account or app, circulating water through hydraulic equipment, unsealing probes, or installing software or consumables. Initial inspection of the product does not lead to a deduction.
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  • Delivery of bulky goods: delivery is made to the curb. B2C: transport risk is ours until physical delivery (art. 66 ter); we recommend noting visible damages on the delivery note and notifying us of breakages within 24-48 hours with photographs to activate the insurance. B2B: inspection and notation on the delivery note are mandatory; hidden damages must be reported within 24 hours (art. 366 CCom). Unjustified rejection or incorrect shipping information will entail the actual outbound and return costs (approx. €85-550 for heavy machinery).

Made to your measure (Advanced Pre-Assembly)

  • If your order includes equipment, racks, hydraulic assemblies, or technical rooms made or configured according to your specifications (permanent joints, custom cuts or wiring, parameterization, pressure testing), these are custom goods without the right of withdrawal from the conclusion of the contract (art. 103.c TRLGDCU; CJEU Case C-529/19), which is informed before purchasing and documented in the signed Order Note. A test you request without permanent modification retains your right of withdrawal, with only the actual loss of value caused by that test being deducted. Would you prefer to receive it tested, configured, and ready to connect, without assuming these risks? Contract our Advanced Pre-Assembly or the prior technical audit.

If you are purchasing as a business or professional (B2B)

  • The transaction is governed by the Commercial Code: firm sale, without the right of withdrawal; notification of defects within 4 days (apparent) / 30 days (hidden), arts. 336 and 342. Q-TECH acts as a distributor and excludes indirect damages, loss of profit, and data loss, limited to the price of the equipment, without prejudice to the manufacturer's commercial warranty.

Product warnings v1.0 · June 2026. Information summary; the complete and binding conditions are those published at q-tech.es.

The VIESSMANN Vitodens 111-W wall-mounted gas condensing boiler is the definitive solution for homes that demand high and constant Domestic Hot Water (DHW) comfort. Its compact design hides a 46-liter stainless steel loading cylinder, ensuring immediate availability of hot water with superior performance.

This unit combines economy, durability, and the reliability characteristic of Viessmann at an attractive price, offering the best value for money in boilers with integrated storage.

💧 Uninterrupted DHW Comfort (Conversion Psychology)

The central feature of the Vitodens 111-W is its ability to manage large hot water demands.

High-Demand Storage and Production

  • Integrated Loading Cylinder (46 liters): The 46-liter stainless steel tank ensures a large volume of hot water is available at all times, ideal for simultaneous use at multiple points.

  • Modulating Loading System: Thanks to a precise outlet temperature sensor, the modulating loading system ensures that the DHW temperature remains constant, eliminating annoying fluctuations.

  • Reduced Production Times: The high-power charging system allows for high DHW production and significantly reduces the cylinder’s reheating times.

🛡️ Maximum Reliability and Technical Efficiency (E-E-A-T: Authority)

Durability and low consumption are essential pillars of Viessmann technology.

Key Components with Warranty and High Performance

  • Inox-Radial Heat Exchanger with a 10-Year Warranty: The decade-long warranty on the stainless steel heat exchanger (Viessmann's proprietary technology) ensures long-term reliability and corrosion resistance. Its self-cleaning effect maintains constant efficiency.

  • MatriX-Plus Burner and Lambda Pro: The new MatriX-Plus burner improves thermal performance and reduces emissions. Operational safety is maximized with the Lambda Pro automatic combustion control, which optimizes the gas and air mixture.

  • H2-Ready: The boiler is prepared for the energy future, certified to operate with up to a 20% hydrogen (H2) blend with natural gas.

🔌 Efficiency and Intelligent Control

  • A+ Energy Rating: When combined with a modulating thermostat or solar collectors, the unit can reach the highest A+ energy efficiency rating for heating.

  • High-Efficiency Pump: Reduces the overall electrical consumption of the unit.

  • 1:10 Modulation Range: This wide modulation range reduces on/off cycles, increasing seasonal performance (up to 94% PCS) and the durability of the equipment.

  • WIFI Inside and ViCare App: Allows management and control of the boiler via the Vicare app, with no need for additional accessories.

📐 Installation and Maintenance

  • Compact Design: Despite having a storage tank, its dimensions are compact, facilitating its integration into the home.

  • Ready to Install: Delivered fully assembled and wired from the factory.

  • Frontal Maintenance: All elements of the boiler are accessible from the front, ensuring quick and easy maintenance for the professional technician.

  • Integrated Expansion Vessel: Includes a 10-liter expansion vessel as standard.


⚙️ Technical Specifications

Essential Vitodens 111-W Technical Data Sheet

  • Type: Wall-Mounted Gas Condensing Boiler.

  • Storage: Integrated 46-liter Stainless Steel Loading Cylinder.

  • Energy Efficiency: A (A+ with modulating thermostat/outdoor sensor).

  • Seasonal Performance: Up to 94% (PCS).

  • Modulation Range: Up to 1:10.

  • Heat Exchanger: Inox-Radial (Stainless Steel, 10-year warranty).

  • Combustion Control: Automatic Lambda Pro.

  • Connectivity: WIFI Inside (ViCare App).

  • Expansion Vessel: Integrated 10-liter.

  • Future Fuel: Certified for 20% H2.


❓ Frequently Asked Questions

Technical Questions regarding the Vitodens 111-W DHW Comfort

What type of demand is the 46-liter loading cylinder ideal for?

The 46-liter cylinder is ideal for homes with medium to high DHW demand where large flow rates are required in short periods, such as quickly filling a bathtub or the simultaneous use of two showers. It provides superior comfort compared to an instantaneous boiler.

How is the A+ energy rating achieved?

The boiler reaches the A+ rating for heating when installed in combination with a modulating thermostat (class VI) with an outdoor sensor or when integrated with a solar collector system. These components allow for ultra-efficient temperature management.

Is the 46-liter integrated cylinder enough for a large home?

The 46-liter tank is very efficient, and its modulating loading system ensures quick replenishment of hot water. For homes with exceptionally high demand or a large number of users, it is an excellent solution that outperforms instantaneous boilers while maintaining a compact wall-mounted design.


📞 Professional Support

Assistance and Installation Guides for Professionals

Installation of the Vitodens 111-W is quick thanks to its pre-wired delivery and frontal access. Our technical team provides detailed guides and direct support for the proper commissioning of the Lambda Pro control and the integration of modulating thermostats.

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