Skip to product information
Viessmann Vitodens 100-W Combi Boiler 26kW–35kW
£1,699.99
Taxes included.
Free Shipping
On orders over £100* (On Select Products)
Secure Payment
100% secure checkout
Easy Returns
30-day return policy
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 100-W Combi Boiler 26kW, 30kW and 35kW
Viessmann's premium-value combi with a stainless Inox-Radial heat exchanger, MatriX-Plus burner and Lambda Pro combustion control, LCD touch display and ViCare app connectivity. A strong choice where you want a longer guarantee and higher hot water flow. Natural gas, LPG compatible.
- Inox-Radial stainless steel heat exchanger, MatriX-Plus burner with Lambda Pro
- Up to 98% efficiency (Hs), ErP class A
- Hot water flow up to 17 l/min (35kW)
- Integral WiFi and ViCare app; touch display
- 8 litre expansion vessel and integral filling device
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 100-W combi boiler in the selected output
- Control unit with integral WiFi, integral safety valves, high-efficiency pump and 3-way valve
- 8 litre expansion vessel, integral filling device, wall mounting bracket, flue connection and valve fittings
- Flue not included: the horizontal flue kit is added with the selector above
Sizes and prices
| Capacity | Hot water flow | Viessmann code | Part number | Price inc VAT |
|---|---|---|---|---|
| 26kW | 13.3 l/min | ZK06235 (7970761) | PLUMHEAT4518 | £1,699.99 |
| 30kW | 15.6 l/min | ZK06236 (7970762) | PLUMHEAT4519 | £1,773.99 |
| 35kW | 17 l/min | ZK06237 (7970763) | PLUMHEAT4520 | £1,819.99 |
Viessmann Direct now also lists the 100-W combi as type B1KG (3203679/3203680/3203677); we supply the current model available from Viessmann's UK distribution.
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 valve fittings cover ZK05674: tidy finish under the boiler.
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 12 years' guarantee on the Vitodens 100-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 100-W/111-W brochure (Nov 2025), Viessmann Vitodens 100-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 Combi 25–35kW
- Viessmann Vitodens 050-W System 19–25kW
- 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.
