Viessmann Boiler Prices & Reviews 2026

Viessmann is one of the most trusted boiler brands in the UK, combining German engineering quality with strong energy efficiency ratings and long Alpha is the very first boiler manufacturer to offer an incredible 13-year warranty on their E-Tec Plus boilers. To extend the standard 10-year warranty terms. This guide covers everything you need to know: current prices for every Viessmann model, honest model-by-model reviews, warranty information, and how Viessmann compares to other leading brands.

Quick answer: Viessmann boilers cost between £790 and £4,275 for the unit alone (depending on model and output). With installation, expect to pay £1,800 to £5,275. The most popular model — the Vitodens 100-W — starts from around £950 and is a Which? Best Buy.

Viessmann Boiler Prices at a Glance (2026)

The table below shows all current Viessmann boiler models, their type, efficiency rating, suitable home size, maximum warranty, and price range — both with and without installation.

All prices are approximate and vary by output size, supplier, and installation complexity. Installation costs typically add £500–£1,500 to the unit price.

Who Are Viessmann?

Founded in Germany in 1917, Viessmann started as a small heating system provider and has grown into one of the world’s most respected boiler manufacturers. It remains a family-owned business, and that heritage is reflected in its commitment to product quality and long-term engineering standards.

In the UK, Viessmann holds a 4.5-star rating on Trustpilot and has received multiple Which? Best Buy awards. The Vitodens 100-W, in particular, is consistently named among the best combi boilers available for UK homeowners.

All Viessmann boiler components are manufactured in its German production facilities, giving the brand tight quality control that budget manufacturers cannot always match.

What Types of Boiler Does Viessmann Make?

Viessmann produces three core boiler types, all within the Vitodens condensing gas boiler range:

Combi boilers heat your home and provide hot water directly from the unit — no separate hot water cylinder or cold water tank required. They are ideal for smaller properties with one bathroom and moderate hot water demand.

System boilers work alongside a dedicated hot water cylinder. They can supply hot water to multiple bathrooms simultaneously without pressure drops, making them well-suited to larger homes with two or more bathrooms.

Heat-only (conventional) boilers pair with both a hot water cylinder and a cold water storage tank. They are the right choice for homes with traditional gravity-fed heating systems or particularly high hot water demands.

Viessmann Boiler Reviews: Every Model Rated

Vitodens 050-W — Best Budget Viessmann Boiler

The Vitodens 050-W is Viessmann’s entry-level model, available as a combi or system boiler with outputs ranging from 3.2 to 35 kW. It is a solid, no-frills boiler that delivers reliable A-rated efficiency without the premium price tag of the 100-W or 200-W.

It suits households with one to three bedrooms and a single bathroom. The main trade-off compared to higher models is a shorter maximum warranty (up to 10 years vs 12 years) and fewer advanced features.

Pros: Affordable entry price, easy to install, A-rated efficiency, compact dimensions (707 × 400 × 350 mm).
Cons: Shorter warranty period, fewer smart features, less suited to high hot water demand.

Read the full Viessmann Vitodens 050 review for a detailed breakdown.

Vitodens 100-W — Best All-Round Viessmann Boiler

The Vitodens 100-W is Viessmann’s most popular model and a Which? Best Buy. It comes as a combi, system, or heat-only boiler, making it the most versatile option in the range. Output runs from 3.2 to 35 kW for combi versions, with up to 30 kW of hot water output.

It suits homes from one to four bedrooms, is competitively priced, and supports smart controls via the Vitoconnect app. The 12-year warranty (when registered and serviced through an approved engineer) offers strong long-term value.

Pros: Which? Best Buy, excellent price-to-performance ratio, versatile boiler types, smart home compatible, 12-year maximum warranty.
Cons: May be more boiler than a very small flat requires.

Read the full Viessmann Vitodens 100-W review for specifications and installation prices.

Vitodens 200-W — Best Premium Viessmann Boiler

The Vitodens 200-W is Viessmann’s flagship condensing boiler, offering advanced modulating technology for maximum efficiency. It is available as a combi (up to 32 kW hot water output) or system boiler, and suits medium-to-large homes with three or four bedrooms and two or more bathrooms.

The 200-W achieves some of the highest efficiency figures in its class and includes built-in weather compensation to automatically adjust heating output based on outdoor temperature — reducing energy use without any manual input.

Pros: Highest efficiency in the Vitodens range, weather compensation as standard, 12-year maximum warranty, excellent smart home integration.
Cons: Highest unit cost of the wall-mounted range, larger installation footprint (850 × 450 × 360 mm).

Read the full Vitodens 200-W review for a complete assessment.

Vitodens 111-W — Best for Low Water Pressure

The Vitodens 111-W is a storage combi boiler — it combines a combi boiler with a built-in hot water storage cylinder (typically 46 or 100 litres depending on the model). This means it can pre-heat and store water so it is ready on demand, making it ideal for homes in areas with low mains water pressure or households that use a lot of hot water at once.

It is available as both a storage combi (6.5–25 kW heating output, up to 30 kW hot water) and a system boiler (3.2–32 kW). Dimensions are larger than a standard combi at 900 × 600 × 480 mm.

Pros: Solves low water pressure issues, fast hot water delivery, no separate cylinder needed, 12-year maximum warranty.
Cons: Larger and heavier than a standard combi, higher unit cost.

Read the full Vitodens 111-W review for more detail.

Vitodens 222-F — Best for Large Homes

The Vitodens 222-F is a floor-standing storage combi boiler — the most powerful and spacious option in the Viessmann domestic range. At 1,425 × 600 × 595 mm, it requires dedicated floor space, but in return it delivers up to 32 kW of both heating and hot water output with an integrated storage cylinder.

It is best suited to large homes with three or four bedrooms and two or three bathrooms where simultaneous hot water demand is high.

Pros: High hot water output, integrated storage cylinder, 12-year maximum warranty, excellent for large families.
Cons: Large physical footprint required, highest unit and installation costs in the range.

Read the full review of the Viessmann Vitodens 222-F for specifications and pricing.

Key Features Across All Viessmann Boilers

All models in the Vitodens range share a set of core features that explain the brand’s strong reputation:

Inox-Radial stainless steel heat exchanger — Viessmann’s proprietary design reduces corrosion risk and extends the working life of the boiler. Unlike competitors that use aluminium or heavily plastic-dependent exchangers, all Vitodens boilers include this as standard.

Modulating burners — The burner adjusts its output in real time to match heating demand rather than simply switching on and off at full power. This significantly improves efficiency and reduces wear on components.

A-rated efficiency — Every current Viessmann model achieves an ErP A-rating, with some reaching up to 98% thermal efficiency in real-world conditions.

Smart controls via ViCare app — Viessmann’s ViCare app (rated 4.6 stars on the Apple App Store) allows remote control and monitoring of your boiler from a smartphone. The Vitoconnect module enables integration with third-party smart home systems.

Quiet operation — The Vitodens range is engineered for low noise output, making it suitable for installation in kitchens, utility rooms, and other living areas.

Viessmann Boiler Warranty: What You Need to Know

All Viessmann boilers come with a standard 2-year manufacturer’s warranty as a minimum. However, the Vitodens series offers significantly longer cover when conditions are met:

Registering your boiler within 30 days of installation with a Gas Safe registered engineer qualifies you for an extended 7-year parts and labour warranty as standard. Many models — including the Vitodens 100-W, 200-W, 111-W, and 222-F — can have this extended to 10 or 12 years for an additional fee, depending on where you purchase.

The Vitodens 050-W has a maximum warranty of 10 years; all other models in the range can reach 12 years. For full details on what is and is not covered, see our dedicated Viessmann boiler warranty guide.

When you purchase through Boiler Central, extended warranty options and boiler cover plans are available to provide additional protection beyond the manufacturer’s terms.

Common Viessmann Boiler Problems and Error Codes

Despite their reliability, Viessmann boilers — like any heating system — will occasionally develop faults. When an issue occurs, your boiler’s display will show an error or fault code that helps identify the problem.

The most common issue across all boiler brands is low pressure. You can repressurise your Viessmann boiler yourself by topping up the system via the filling loop — there is no need to call an engineer for this.

Other common issues — such as ignition failures, sensor faults, or pump problems — are best handled by a Gas Safe registered engineer. If your boiler is within warranty and the fault is covered, repairs may be free of charge. If not, repair costs can be significant, particularly if parts need replacing.

Boiler Central offers boiler cover plans that can cover call-out fees, parts, labour, and even annual servicing (Viessmann recommends a service every 12 months). Cover can save you money in the long run and keep your warranty valid.

How Does Viessmann Compare to Other Boiler Brands?

Viessmann vs Vaillant

Both are German brands with strong international reputations. Viessmann boilers are typically slightly more affordable than equivalent Vaillant models and edge ahead on energy efficiency figures and warranty terms. Vaillant scores marginally higher on Trustpilot and its myVAILLANT app is considered slightly more intuitive by some users. Both are excellent choices; the decision largely comes down to specific model comparisons. See our full overview of Viessmann vs Vaillant boilers.

Viessmann vs Worcester Bosch

Worcester Bosch is the UK’s market-leading brand by volume installed, with a Trustpilot score of 4.6 stars versus Viessmann’s 4.5. Worcester Bosch boilers tend to cost more on average, but offer a strong 12-year warranty on most models and well-regarded smart control options through the Bosch EasyControl app. Viessmann counters with German manufacturing heritage, arguably superior build quality, and the highly rated ViCare app. See the Worcester 4000 vs Viessmann Vitodens 050-W comparison and our full Worcester Bosch boiler prices guide for a direct comparison.

Viessmann vs Alpha

Alpha (the UK arm of Immergas) scores slightly higher on Trustpilot at 4.7 stars and offers a lower average unit price than Viessmann. Alpha’s maximum warranty reaches 13 years — longer than Viessmann’s 12 — though its standard warranty on most models is just 5 years. Alpha also offers its innovative Gassaver accessory, which pre-heats cold water using waste flue heat. That said, Viessmann’s build quality, in-house manufacturing, and smart technology are widely considered superior. See our Alpha boiler reviews and prices guide.

Viessmann vs Ideal Boilers

Ideal Heating has a 4.8-star Trustpilot rating and lower average prices, making it a popular budget-conscious option. However, Ideal outsources the manufacture of some components, relying more heavily on plastic parts than Viessmann. Viessmann manufactures everything in-house, uses brass fittings throughout, and equips every boiler with its stainless steel Inox-Radial heat exchanger. Ideal’s app scores just 1.6 stars on the Apple App Store versus Viessmann’s 4.6, which is a significant gap for homeowners who want smart control functionality. See our Ideal boiler prices and reviews guide.

Viessmann vs Glow Worm

Glow Worm is part of the Vaillant Group and positions itself as the more affordable alternative within that family. Its boilers are reliable and benefit from Vaillant’s engineering heritage, but are generally less energy-efficient than Viessmann models. For homeowners on a tighter budget, Glow Worm is worth considering, but Viessmann’s greater efficiency and longer warranties often make it the better long-term investment. See our Glow Worm boiler reviews and prices guide.

Frequently Asked Questions About Viessmann Boilers

How much does a Viessmann boiler cost?

A Viessmann boiler costs between £790 and £4,275 for the unit alone. The entry-level Vitodens 050-W starts from £790, while the floor-standing Vitodens 222-F reaches £4,275. With installation included, expect to pay £1,800 to £5,275 depending on the model and complexity of the job.

What is the best Viessmann boiler?

For most UK homes, the Vitodens 100-W is the best Viessmann boiler. It is a Which? Best Buy, covers one to four-bedroom properties, and offers combi, system, and heat-only variants — all with a 12-year maximum warranty. The Vitodens 200-W is the better choice for larger homes or those prioritising maximum efficiency.

How long is the Viessmann boiler warranty?

Standard warranty is 2 years. When registered within 30 days of installation, the Vitodens series qualifies for up to 7 years as standard, extendable to 10 or 12 years (depending on model) for an additional fee. The Vitodens 050-W has a maximum of 10 years; all other Vitodens models can reach 12 years.

Are Viessmann boilers reliable?

Yes. Viessmann boilers are widely regarded as highly reliable. The brand has over 100 years of manufacturing experience, produces all its components in-house, and uses a stainless steel Inox-Radial heat exchanger across its entire range. It holds a 4.5-star Trustpilot rating and multiple Which? Best Buy awards.

Is Viessmann being discontinued or replaced?

No. Viessmann continues to manufacture and sell its Vitodens gas boiler range in the UK. The brand is also developing hydrogen-ready and heat pump products as part of its transition towards low-carbon heating — so it is actively investing in future technology rather than winding down.

What size Viessmann boiler do I need?

For a one-to-two bedroom home with one bathroom, a Vitodens 050-W or 100-W in the 25–26 kW output range is typically sufficient. For three-to-four bedroom homes with two bathrooms, a Vitodens 100-W or 200-W at 30–35 kW is more appropriate. For larger homes with multiple simultaneous hot water needs, the Vitodens 111-W or 222-F are the best fit.

Can I get a Viessmann boiler on finance?

Yes. Boiler Central offers Viessmann boilers on interest-free finance, allowing you to spread the cost of your energy costs. A new boiler and installation rather than paying in full upfront.

Is a Viessmann Boiler Right for Your Home?

Viessmann boilers sit at the premium end of the market, but the combination of German engineering quality, A-rated efficiency, long warranty terms, and an excellent smart control app means the investment is justified for most homeowners. Running costs are typically lower than budget alternatives, and the extended warranties provide genuine long-term peace of mind.

If you are ready to get a fixed price for a Viessmann boiler including installation, Boiler Central provides a complete boiler quote online with next-day installation available in most areas. All installations are carried out by Gas Safe registered engineers, and our prices are fixed — no hidden extras.

For more help choosing between models, contact us and our team can recommend the right Viessmann boiler for your home size, hot water demand, and budget. You can also explore everything you need to know about a new boiler installation before you commit.