Name: Viessmann Vitodens 111-W gas condensing boiler with built-in 46 l cylinder
Brand: Viessmann
SKU: VI-Z030941
Price: 4448.67 EUR
Availability: InStock

Vitodens 111-W wall-hung gas condensing boiler, three-quarter view

Vitodens 111-W front view with the control display at the bottom

Vitodens 111-W seven-segment display with touch buttons

Vitodens 111-W installed in a utility room

Vitodens 111-W: opinión de un instalador (Viessmann Reino Unido, en inglés)

Model

Vitodens 111-W B1LG 19 kW · DHW 27 kW

Vitodens 111-W B1LG 25 kW · DHW 30 kW

Vitodens 111-W B1LG 32 kW · DHW 34 kW

Quantity

€4.448,67

Tax included. Shipping calculated at checkout.

2 in stock
Backordered, shipping soon

At Q-TECH, we apply the same clear rules for everyone: the law protects you, and when applied correctly, it protects us as well. By processing your purchase, you accept our General Terms and Conditions of Sale. If you are purchasing as a consumer (B2C), nothing stated herein limits the rights granted to you by mandatory law (RDL 1/2007, TRLGDCU): the 3-year legal warranty of conformity and the right of withdrawal under the terms and with the exceptions legally provided, which are detailed below. References to "B2B" apply only to businesses and professionals.

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.
The same item must be returned: withdrawal requires returning the supplied unit. Different equipment, or equipment with prior use, age, or wear prior to purchase, does not constitute a valid withdrawal.
Installation and cybersecurity, shared responsibility: this is technical hardware; you are responsible for correct installation, credentials, patches, and backups, while we deliver a compliant product. Q-TECH is not liable for damages resulting from poor installation, incorrect configuration, or omission of patches by the customer or third parties (in B2C, without prejudice to the legal warranty and liability for intent or negligence, arts. 86 and 130 TRLGDCU).
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.

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Gas condensing boiler with a built-in 46-litre hot water cylinder

The Viessmann Vitodens 111-W is a wall-hung gas condensing boiler with a 46-litre stainless steel cylinder built in. Viessmann states that it gives the same hot water comfort as a separate 150-litre cylinder. At Q-Tech we build it into your pre-assembled plant room, assembled and tested in our workshop before it reaches the site.

Summary

Type	Wall-hung gas condensing boiler with integrated storage
Brand and model	Viessmann Vitodens 111-W, model B1LG
Use	Heating and domestic hot water (DHW) in detached and semi-detached homes
Rated output	3.2 to 19, 25 or 32 kW depending on the variant, at 50 °C flow and 30 °C return
Hot water	46-litre cylinder; 154 to 181 litres in 10 minutes, from 10 to 45 °C
Compatible with	Natural gas and LPG; natural gas blended with up to 20% hydrogen by volume
Power supply	230 V, 50 Hz
Q-Tech installation	Built into a pre-assembled plant room with the Advanced Pre-Assembly service

What is the Vitodens 111-W?

The Vitodens 111-W from Viessmann is a wall-hung gas condensing boiler for heating and hot water with a built-in 46-litre cylinder. Its MatriX-Plus burner heats the heating water and charges the cylinder. Viessmann recommends it for houses, fitted in utility rooms or loft floors.

Viessmann technology in the Vitodens 111-W

MatriX-Plus burner with Lambda Pro Plus combustion control, which adapts to the gas quality and works with modulation up to 1:10.
Inox-Radial heat exchanger in high-alloy stainless steel, designed by Viessmann for a long service life.

What problem does it solve?

An instantaneous combi boiler splits its output when two taps are open and the temperature drops. The Vitodens 111-W keeps 46 litres ready and delivers hot water at several outlets at once without taking up the space of a floor-standing cylinder.

If only the heating load is calculated for a home with two bathrooms, hot water can run short at peak times. With the Vitodens 111-W the cylinder covers those peaks and the boiler modulates for the rest of the demand.

Technical data

Model	Vitodens 111-W B1LG, 19, 25 and 32 kW
Rated output at 80 °C flow and 60 °C return	2.9 to 17.5, 23 or 29.3 kW
Modulation range	Up to 1:10
Seasonal space heating energy efficiency	93% (19 kW) and 94% (25 and 32 kW)
Standard seasonal efficiency	Up to 98% gross calorific value, at 40 °C flow and 30 °C return
Energy efficiency class	A for heating; A for hot water with XL load profile
NOx class	6
Cylinder	46 litres, stainless steel; maximum pressure 10 bar
Expansion vessel	10 litres, built in
Dimensions	500 mm deep, 600 mm wide and 950 mm high
Weight	67.8 kg empty; 120 kg filled
Connections	Heating R ¾; cold and hot water G ½; gas R ¾
Fuel	Natural gas and LPG; LPG conversion is set in the controller, no kit needed
Controller	Seven-segment display with touch buttons; built-in WiFi and ViCare app

Models and data by variant

Variant	Viessmann reference	Rated output at 50 °C flow	Continuous hot water output	Hot water in 10 minutes	Electrical power
19 kW	Z030941	3.2 to 19 kW	26.6 kW	154 litres	53 W
25 kW	Z030942	3.2 to 25 kW	30.3 kW	170 litres	73 W
32 kW	Z030943	3.2 to 32 kW	33.9 kW	181 litres	113 W

Compatibility and limits

Runs on natural gas and LPG; Viessmann declares it suitable for blends with up to 20% hydrogen by volume.
It needs the mounting rail, ordered separately: it carries the valves, DHW safety valve, fill valve and gas valve.
It can be wall-mounted or recessed, and fits a 600 mm kitchen unit module.
Extra functions with the Viessmann ADIO extension module.
It must be installed in a dry, frost-free room (IP X1).
It reaches 32 kW rated output; for more, the Vitodens 200-W B2HA, 49 to 99 kW.

When this product is not the right choice

Product	When to choose it	Rated output	Hot water
Vitodens 200-W	If you need a more compact boiler, combi or with a separate cylinder	1.9 to 32 kW	Instantaneous or with a separate cylinder
Vitodens 100-W	If you do not need storage and prefer a combi boiler	3.2 to 32 kW	Instantaneous
Vitodens 050-W	If you want the Viessmann entry range for low outputs	3.2 to 25 kW	Instantaneous

Frequently asked questions

Which model do I need?

The one that covers the heating load calculated for your home. All three variants share the same 46-litre cylinder; the 32 kW gives 181 litres in 10 minutes and the 19 kW gives 154. If in doubt, a technical call with an Expert Technician reviews your case.

Does it replace the Vitodens 111-W B1LF?

Yes. The B1LG is the current generation in the Viessmann price list and replaces references Z023133, Z023134 and Z023135, output for output.

What is included and what must be ordered separately?

It includes the cylinder, a 10-litre expansion vessel and a high-efficiency pump. The mounting rail with the valves is ordered separately.

What is the delivery time?

It is in stock at our warehouse. It ships on a pallet and transport is quoted separately.

Can I install it myself?

No. The gas connection and commissioning must be done by a licensed installation company. Q-Tech delivers it built into a pre-assembled plant room or connects it on site with its Expert Technician.

Q-Tech installation and support

With Advanced Pre-Assembly, our Expert Technician assembles in the workshop the Vitodens 111-W with the rest of your plant room: wiring, parameter setting and testing, with safety, function and pressure tests. Your plant room arrives tested and ready to connect, documented with photos and a report.

The final connection is made by your installer or by Q-Tech, from one working day depending on the type and size of the room. That means fewer site visits, fewer companies working in the same room at once and fewer technical issues. If another company installs the boiler, Q-Tech completes the electrics and controls after a verification visit with the on-site hourly Expert Technician.

See the full range in Viessmann H2 Ready gas boilers and components, the Expert Technician services or write to us from the contact page.

Documentation

Q-Tech VDI 2035 calculator

Check whether the water in your heating system meets the VDI 2035 guideline (Part 1, 2021). Enter the output, the system volume in litres and the hardness and conductivity of your mains water: the calculator gives you the verdict and the three key figures for filling or topping up the circuit. If you need it, we will send you the full report.

Guidance only: check the manufacturer's requirements.

VDI 2035 calculator: check whether your system water meets the guideline. Open the calculator

Availability and lead times: this item is in stock at our warehouse. Occasionally, depending on the time of year, the stock update may contain an error. If no units are available when you place your order, we will order it urgently and inform you immediately of the updated delivery time.