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Viessmann Vitodens 050-W Combi Boiler 25kW–35kW
£1,210.99
Taxes included.
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Pickup available at F3 Castings Way, Leafbridge, Castings Way, Lincoln
Usually ready in 24 hours
Supplied to order. Ordered in from Viessmann's UK distribution for you, usually 2–4 working days to dispatch.
Viessmann Vitodens 050-W Combi Boiler (B0KA) 25kW, 30kW and 35kW
Viessmann's compact, value-led gas condensing combi, our best-selling boiler. A stainless steel Inox-Radial heat exchanger, MatriX-Plus burner with Lambda Pro combustion control and a small 700 x 400 x 300mm casing make it easy to fit in a kitchen cupboard. Natural gas, LPG compatible.
- Inox-Radial stainless steel heat exchanger and MatriX-Plus burner with Lambda Pro
- Modulation up to 1:8 and ErP class A (92% seasonal efficiency)
- Compact: 700 x 400 x 300mm (H x W x D), cupboard-fit
- 8 litre expansion vessel, high-efficiency pump and 3-way valve built in
- ViCare app control with the ViCare thermostat (integral WiFi depending on version)
Required with this boiler: a flue kit
Viessmann boilers are supplied without a flue. The Flue kit selector above Add to cart adds the Viessmann 7946886 60/100mm horizontal flue kit by default, as a separate line in your basket.
Only choose "I already have this" if you already have a compatible Viessmann 60/100 flue, or you need a different route: see the vertical flue kit, extensions and bends. Only Viessmann flue components may be used with Vitodens boilers.
What is included
- Viessmann Vitodens 050-W combi boiler (B0KA) in the selected output
- Control unit, integral safety valves, variable-speed circulation pump and 3-way valve
- 8 litre expansion vessel, wall mounting bracket, boiler flue connection and valve fittings
- Flue not included: the horizontal flue kit is added with the selector above
Sizes and prices
| Capacity | Heating output | Hot water flow | Viessmann code | Part number | Price inc VAT |
|---|---|---|---|---|---|
| 25kW | 3.2–19kW | 10.2 l/min | 7987363 | PLUMHEAT4504 | £1,210.99 |
| 30kW | 3.2–25kW | 12.2 l/min | 7987364 | PLUMHEAT4505 | £1,296.99 |
| 35kW | 3.2–32kW | 14.3 l/min | 7987366 | PLUMHEAT4506 | £1,478.99 |
Viessmann also lists these models under newer order codes (7098601/7098602/7098603); the boiler type is the same B0KA.
Recommended add-ons
Tick these under the flue selector to add them to your order:
- Viessmann ViCare wireless thermostat ZK05991: app control and load compensation (Boiler Plus) on PlusBus Vitodens boilers.
- Inta Trade Tec 22mm magnetic filter: protects the heat exchanger; a system filter is expected under most manufacturer guarantees.
- Viessmann plume management kit 7946889: moves the plume away from windows, doors and boundaries.
- Viessmann 60/100 flue extension 1m 7373224: for walls thicker than the standard kit.
- Viessmann 60/100 flue bends: 87° or 45° pair for offsets.
- Viessmann vertical flue kit 7373230: for roof exits (choose "I already have this" for the horizontal kit).
Installation and compliance
Installation and guarantee
Installation must be by a Gas Safe registered engineer (oil: OFTEC registered) and commissioned with the Benchmark checklist. Manufacturer guarantees require registration after installation and annual servicing; extended guarantee terms are the manufacturer's and may require their approved filter/installer.
Viessmann UK currently offers up to 10 years' guarantee on the Vitodens 050-W when registered via ViessmannPlus (VPlus); see Viessmann's current terms.
- Natural gas as supplied; LPG operation must be set up to Viessmann's instructions by a Gas Safe engineer.
- Boiler Plus (England): combis need an approved efficiency measure such as load compensation (e.g. the ViCare thermostat) or weather compensation.
- Condensate must be routed to Building Regulations; external runs should be 32mm and insulated.
Delivery and collection
Delivered by pallet/courier (£29.99 per order) or collect free from Leafbridge, Lincoln. Order-in boilers usually 2-4 working days.
Viessmann Vitodens 050-W brochure (2025), Viessmann Vitodens 050-W combi installation and service instructions and Viessmann Vitodens flue system technical guide (8/2024) are in the PDF downloads at the bottom of this page.
Shop the Viessmann Vitodens range
- Viessmann Vitodens 050-W System 19–25kW
- Viessmann Vitodens 100-W Combi 26–35kW
- Viessmann Vitodens 100-W System 11–32kW
- Viessmann Vitodens 100-W Heat Only 11–32kW
- Viessmann Vitodens 025-W Combi 24–28kW
- Viessmann Vitodens 200-W System 11–32kW
Flues and accessories: horizontal flue kit, vertical flue kit, plume kit, valve covers. Browse all boilers.
PDF Downloads
Manufacturer documents for this product.
