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Viessmann Vitodens 100-W Heat Only

A compact regular boiler for a separately designed cylinder and heating circuit.

Viessmann Vitodens 100-W Heat Only boiler
Manufacturer warranty optionsUp to 12 years

For qualifying models and registration packages. Annual servicing required.

Your written quotation confirms the cover included. Extensions may be chargeable. Badges in the product image are subject to these conditions.

Warranty eligibility & conditions

Up to 12 years for an eligible VPlus registration as advertised on the current UK product page. Some older product copy describes 10 years with an extension; confirm the applicable generation and registration package. Subject to current manufacturer terms, model and installation eligibility, installer registration/status, correct commissioning and annual servicing. Registration deadlines and any qualifying controls, accessories or system-water requirements must be confirmed. The written quotation confirms actual cover; maximum cover is not automatic.

Manufacturer warranty information
Official Vitodens 100-W Heat Only product image.

At a glance

Fuel and boiler type
Natural gas · Heat-only / regular
Output options
11 kW | 16 kW | 19 kW | 25 kW | 32 kW
UK range position
Listed in the current Viessmann UK directory and linked UK literature; exact generation and supply availability confirmed before quotation.
Warranty eligibility
Up to 12 years, subject to model, registration route, qualifying installation and current manufacturer terms; extensions may be chargeable.

How this arrangement works

A compact regular boiler for a separately designed cylinder and heating circuit.

Heating and hot-water output options

Natural-gas figures. CH at 80/60°C; condensing CH at 50/30°C. Output label, heating maximum and hot-water rating describe different functions.

Vitodens 100-W Heat Only — verified output options
Model / output optionHeating at 80/60°CHeating at 50/30°CHot-water outputFlow at 35°C rise
11 kW option · 72286072.9–9.9 kW11 kWSeparate cylinder; no instantaneous ratingNot an instantaneous DHW appliance
16 kW option · 72286082.9–14.4 kW16 kWSeparate cylinder; no instantaneous ratingNot an instantaneous DHW appliance
19 kW option · 72286092.9–17 kW19 kWSeparate cylinder; no instantaneous ratingNot an instantaneous DHW appliance
25 kW option · 72286102.9–22.5 kW25 kWSeparate cylinder; no instantaneous ratingNot an instantaneous DHW appliance
32 kW option · 72286112.9–30 kW32 kWSeparate cylinder; no instantaneous ratingNot an instantaneous DHW appliance

Casing: 600 mm high × 375 mm wide; depth 285 mm for 11–25 kW, 340 mm for 32 kW. Installation and service clearances are additional.

A separate hot-water cylinder is required; no instantaneous flow rating is claimed.

Key benefits

The shorter 600 mm casing and stainless-steel Inox-Radial heat exchanger support consideration in existing regular-boiler installations. Five condensing heating maxima are documented.

Key takeaway

Retaining a suitable cylinder-based layout can be worth assessing before conversion. Check pumps, tanks, controls, pipework and cylinder condition together.

Warranty and registration conditions

Up to 12 years for an eligible VPlus registration as advertised on the current UK product page. Some older product copy describes 10 years with an extension; confirm the applicable generation and registration package. Subject to current manufacturer terms, model and installation eligibility, installer registration/status, correct commissioning and annual servicing. Registration deadlines and any qualifying controls, accessories or system-water requirements must be confirmed. The written quotation confirms actual cover; maximum cover is not automatic.

Manufacturer model and warranty information · Registration terms and warranty table

Controls and installation planning

Compatible Viessmann controls and ViCare connectivity depend on the exact appliance generation, WiFi version, accessories and system design. Confirm the selected controls, wiring and available functions during assessment.

Dimensions vary by output or arrangement. Check the exact model manual and working clearances before choosing the installation space.

Continue your assessment

The Boiler Finder can link to this family as an initial research option. It does not rank manufacturers, select a precise kW variant or replace a heating survey.

Heat-only / regular arrangement guidance

Model questions

How should I compare Vitodens 100-W Heat Only outputs?

Read the rating basis alongside the table. Heating, hot-water output and storage delivery describe different duties. Boiler labels and bedroom counts are not substitutes for calculated heat loss and measured water supply.

What warranty applies to Vitodens 100-W Heat Only?

Up to 12 years for an eligible VPlus registration as advertised on the current UK product page. Some older product copy describes 10 years with an extension; confirm the applicable generation and registration package. Subject to current manufacturer terms, model and installation eligibility, installer registration/status, correct commissioning and annual servicing. Registration deadlines and any qualifying controls, accessories or system-water requirements must be confirmed. The written quotation confirms actual cover; maximum cover is not automatic.

What should be assessed before choosing Vitodens 100-W Heat Only?

Retaining a suitable cylinder-based layout can be worth assessing before conversion. Check pumps, tanks, controls, pipework and cylinder condition together. Final specification requires professional assessment.

Manufacturer evidence

UK directory and linked manufacturer literature checked 2 October 2026. Exact generation, availability and current warranty entitlement are reconfirmed before quotation. Where manufacturer documents conflict, the chosen rating basis and remaining checks are stated above.

Installation and pricing

The installed price for your selected boiler is confirmed after assessment. The quotation covers the appliance, controls, flue, system preparation and any required pipework. A conversion or relocation can have a different scope from a straightforward replacement.

SwiftHeat’s general starting package

New boiler installations from £1,790 inc. VAT apply to a qualifying standard, straightforward replacement: one bathroom, fewer than 10 radiators and a standard horizontal flue, subject to survey. Specification and warranty selection affect the final cost. This is a general starting offer and is not a price for every model in this catalogue.

Read the starting-package conditions

Humm finance

0% options over 3, 6, 9 or 12 months through Humm Group Limited, subject to application, affordability, eligibility, approval and provider terms. Any applicable deposit, fees and repayment conditions are confirmed during your enquiry/application. Acceptance is not guaranteed.

Finance terms and charges

Qualifying Care+ installations

Two free annual services and a Hive Mini are available on qualifying installations only. Every model is considered under the qualification rules; inclusion in this catalogue does not confirm eligibility. Ask us to confirm the offer in your quotation.

Ask about Care+ eligibility

Ongoing support

Plan the maintenance your appliance requires and keep its service records. If you are considering replacement because of a fault, diagnosis can help establish whether repair is a suitable option first.

Boiler servicing · Repair advice

Installation pricing

Price confirmed following assessment for this configuration. The general New boiler installations from £1,790 inc. VAT offer does not apply to every model or property.

From or indicative prices remain provisional. SwiftHeat issues a written fixed quotation for the agreed scope after the appropriate property and installation assessment, technical checks and warranty-package verification. Remote information gathering may be suitable initially; a home survey is required where the necessary checks cannot be completed remotely.

Your home comes first

We assess heat loss, heating and hot-water requirements, water supply, controls and installation access before recommending an appliance. Bedroom count or a catalogue model number alone cannot establish the right boiler.

Gas Safe registration 978273 · Serving Cardiff, South Wales and across the UK.

Understand suitable boiler types · Start the Boiler Finder · Our installation assessment · Areas we cover