Viessmann boiler installation · Oxfordshire
Viessmann boiler installation in Oxfordshire
Compare the Viessmann Vitodens range with Oxyplumb’s Gas Safe registered team. From compact combis to storage combis and cylinder-based heating, we plan a new boiler around your home.
Viessmann boilers, chosen around your home
For Viessmann boiler installation in Oxfordshire, we explain the range in practical terms. First, we assess your heating load, water supply and available space. Then, we recommend suitable boilers, controls and installation work for your replacement or upgrade.
Explore the Viessmann boiler range
First, compare the Viessmann boiler ranges below, using the images and key facts alongside each description. Then, open the model specifications to see the published figures, or ask our team to explain the choices for your home.
Gas combi and storage boilers
Combi
Vitodens 025-W
First, we check how this range would suit your Viessmann boiler installation. A combi supplies central heating and heats tap water on demand. Therefore, we check the mains-water flow and how you use your showers before choosing the output.
Compare model specifications
| Specification | Published value |
|---|---|
| Output range (kW) | 24 to 28 kW |
| Standard seasonal efficiency to DIN | 98 % (Hs) [gross cv] |
| Energy efficiency class | A |
Combi
Vitodens classic
Also, we compare space and hot-water requirements for your Viessmann boiler installation. A combi supplies central heating and heats tap water on demand. Therefore, we check the mains-water flow and how you use your showers before choosing the output.
Compare model specifications
| Specification | Published value |
|---|---|
| Output range (kW) | 24 to 28 kW |
| Standard seasonal efficiency to DIN | 98 % (Hs) [gross cv] |
| Energy efficiency class | A |
Combi
Vitodens 200-W Combi
Before your Viessmann boiler installation, we assess the existing system and recommend a suitable model. The 200-W offers a 7-inch colour touchscreen, integrated WiFi and a wide modulation range. For example, low-output operation helps the boiler follow a smaller heating demand. The combi version heats tap water on demand without a separate cylinder.
Compare model specifications
| Specification | Published value |
|---|---|
| Output range (kW) | 1.9 to 35 kW |
| ErP efficiency | 94% (Class A) |
| Fuel | Natural gas & LPG. |
Combi
Vitodens 100-W Combi
First, we check how this range would suit your Viessmann boiler installation. The 100-W combines stainless steel heat-exchanger technology with integrated connectivity. In addition, front access helps us plan a practical cupboard installation and future servicing. The combi version heats tap water on demand without a separate cylinder.
Compare model specifications
| Specification | Published value |
|---|---|
| Output range (kW) | 3.2 to 35 kW |
| ErP efficiency | 94% (Class A) |
| Fuel | Natural gas & LPG |
Combi
Vitodens 050-W Combi
Also, we compare space and hot-water requirements for your Viessmann boiler installation. The 050-W uses an Inox-Radial stainless steel heat exchanger and MatriX-Plus burner. In addition, its compact wall-mounted design provides a practical option for smaller homes and heating upgrades. The combi version heats tap water on demand without a separate cylinder.
Compare model specifications
| Specification | Published value |
|---|---|
| Output range (kW) | 3.2 to 35 kW |
| ErP efficiency | 92% (Class A) |
| Fuel | Natural gas, LPG |
Storage combi
Vitodens 222-F
Before your Viessmann boiler installation, we assess the existing system and recommend a suitable model. The 222-F is a floor-standing storage combi. It combines an integrated hot-water store with a 7-inch touchscreen and WiFi. In addition, we discuss the cylinder version and available installation space.
Compare model specifications
| Specification | Published value |
|---|---|
| Output range (kW) | 1.9 to 32 kW |
| Standard seasonal efficiency to DIN | 98 % (Hs) [gross cv] |
| Energy efficiency class | A |
| Fuel | Natural gas & LPG. |
Storage combi
Vitodens 111-W
First, we check how this range would suit your Viessmann boiler installation. The 111-W includes a 46-litre stainless steel loading cylinder. In addition, the MatriX-Plus burner, Inox-Radial heat exchanger and integrated connectivity bring heating and hot water into one wall-mounted package.
Compare model specifications
| Specification | Published value |
|---|---|
| Output range (kW) | 3.2 to 32 kW |
| ErP efficiency | 94% (Class A) |
| Fuel | Natural gas & LPG |
Viessmann system boiler installation
Viessmann system boilers heat your radiators or underfloor heating and work with a separate hot-water cylinder. This is a useful option for households that want stored hot water for several bathrooms. First, Oxyplumb checks your heat loss, cylinder size, mains pressure and heating controls. Then, we recommend the right Viessmann boiler installation for your home.
Compare the 050-W, 100-W and 200-W system options below. These figures describe the system variants. Hot-water capacity and recovery depend on the cylinder and water-pressure design, which we assess during your survey.
System
Vitodens 050-W System
The 050-W system boiler offers 19 and 25 kW options in a compact, 300 mm-deep casing. Its Inox-Radial stainless steel heat exchanger and MatriX-Plus burner provide the core heating technology. Meanwhile, a separate cylinder stores your hot water. We plan the cylinder connection, controls and available cupboard space around your home.
Compare system model specifications
| System boiler specification | 19 kW | 25 kW |
|---|---|---|
| Model type | B0HA | B0HA |
| Boiler type | System | System |
| Natural-gas heating output at 50/30°C (kW) | 3.2–19.0 | 3.2–25.0 |
| Natural-gas heating output at 80/60°C (kW) | 2.9–17.1 | 2.9–22.4 |
| Height (mm) | 700 | 700 |
| Width (mm) | 400 | 400 |
| Depth (mm) | 300 | 300 |
| Published weight (kg) | 35 | 35 |
| Heating energy class | A | A |
| Flue gas connection (mm) | 60 | 60 |
| Combustion air connection (mm) | 100 | 100 |
| Fuel | Natural gas / LPG | Natural gas / LPG |
| Hot-water provision | Separate hot-water cylinder | Separate hot-water cylinder |
System
Vitodens 100-W System
For a Viessmann boiler installation with a separate cylinder, the 100-W system range offers four heating outputs: 11, 19, 25 and 32 kW. Integrated WiFi and LED touch controls make everyday heating control straightforward. In addition, front-access servicing helps when planning a cupboard installation. We match the output to your heat loss and check cylinder capacity for your baths and showers.
Compare system model specifications
| System boiler specification | 11 kW | 19 kW | 25 kW | 32 kW |
|---|---|---|---|---|
| Model type | B1HG | B1HG | B1HG | B1HG |
| Boiler type | System | System | System | System |
| Natural-gas heating output at 50/30°C (kW) | 3.2–11.0 | 3.2–19.0 | 3.2–25.0 | 3.2–32.0 |
| Natural-gas heating output at 80/60°C (kW) | 2.9–10.1 | 2.9–17.5 | 2.9–23.0 | 2.9–29.3 |
| Height (mm) | 700 | 700 | 700 | 700 |
| Width (mm) | 400 | 400 | 400 | 400 |
| Depth (mm) | 360 | 360 | 360 | 360 |
| Published weight (kg) | 32 | 32 | 32 | 32 |
| Heating energy class | A | A | A | A |
| Flue gas connection (mm) | 60 | 60 | 60 | 60 |
| Combustion air connection (mm) | 100 | 100 | 100 | 100 |
| Fuel | Natural gas / LPG | Natural gas / LPG | Natural gas / LPG | Natural gas / LPG |
| Hot-water provision | Separate hot-water cylinder | Separate hot-water cylinder | Separate hot-water cylinder | Separate hot-water cylinder |
System
Vitodens 200-W System
The 200-W system boiler combines a separate hot-water cylinder with heating modulation down to 1.9 kW. Therefore, it can reduce its output as the heating demand falls. A repositionable 7-inch colour touchscreen, integrated WiFi and Lambda Pro Plus combustion control distinguish this range. For your Viessmann boiler installation, we also design the cylinder controls and heating settings around the property.
Compare system model specifications
| System boiler specification | 11 kW | 19 kW | 25 kW | 32 kW |
|---|---|---|---|---|
| Model type | B2HE | B2HE | B2HE | B2HE |
| Boiler type | System | System | System | System |
| Natural-gas heating output at 50/30°C (kW) | 1.9–11.0 | 1.9–19.0 | 1.9–25.0 | 1.9–32.0 |
| Natural-gas heating output at 80/60°C (kW) | 1.7–10.1 | 1.7–17.4 | 1.7–22.9 | 1.7–29.3 |
| Height (mm) | 700 | 700 | 700 | 700 |
| Width (mm) | 450 | 450 | 450 | 450 |
| Depth (mm) | 360 | 360 | 360 | 360 |
| Published weight (kg) | 33 | 33 | 33 | 33 |
| Heating energy class | A | A | A | A |
| Flue gas connection (mm) | 60 | 60 | 60 | 60 |
| Combustion air connection (mm) | 100 | 100 | 100 | 100 |
| Fuel | Natural gas / LPG | Natural gas / LPG | Natural gas / LPG | Natural gas / LPG |
| Hot-water provision | Separate hot-water cylinder | Separate hot-water cylinder | Separate hot-water cylinder | Separate hot-water cylinder |
Gas regular boilers
Regular
Vitodens 100-W Heat Only
Also, we compare space and hot-water requirements for your Viessmann boiler installation. A regular or heat-only boiler works with a separate cylinder and external system components. First, we check the pump, valves and any tanks, then explain the replacement work.
Compare model specifications
| Specification | Published value |
|---|---|
| Output range (kW) | 11 to 32 kW |
| Standard seasonal efficiency to DIN | 98 % (Hs) [gross cv] |
| Energy efficiency class | A |
| Fuel | Natural gas & LPG. |
Compare figures carefully, because manufacturers publish different units and test conditions. For example, hot-water flow at a 35°C temperature rise differs from a figure measured at 40°C. In addition, ErP efficiency and seasonal efficiency to DIN use different test methods. Therefore, we explain the relevant figures before matching the exact model to your quotation.
What matters when choosing Viessmann boilers?
First, we calculate your home’s heating requirement, because radiator numbers alone cannot tell us the right boiler output. In addition, we compare the boiler’s minimum output so it can respond to smaller heating demands.
Next, we assess hot water, because the available water supply and temperature rise affect a combi’s flow at your taps. By contrast, a cylinder-based system needs the right storage capacity and recovery. Therefore, we discuss your showers, baths and daily routine together.
Also, we check the installation space, service access, flue route and controls. Although case dimensions are useful, the installation needs working room around the appliance too. As a result, your quotation covers a complete, practical boiler replacement.
Choose the right Viessmann boiler type
Combi boilers
A combi supplies central heating and heats tap water on demand. Therefore, we check the mains-water flow and how you use your showers before choosing the output.
Discuss your boiler type →System boilers
A system boiler works with a separate hot-water cylinder. As a result, we size the boiler and stored hot water together, including the cylinder controls and recovery needs.
Discuss your boiler type →Regular boilers
A regular or heat-only boiler works with a separate cylinder and external system components. First, we check the pump, valves and any tanks, then explain the replacement work.
Discuss your boiler type →Natural gas and LPG boiler installations
For natural gas, we check the existing supply, boiler position and heating system. In addition, Viessmann offers LPG options within the appropriate ranges. We specify the correct model and fuel setup for your off-mains home.
For example, an LPG version or conversion applies to particular models rather than every boiler in a family. Therefore, our survey confirms the exact appliance and configuration before we quote. Our Gas Safe registered team completes the installation and commissioning.
Your Viessmann boiler installation, step by step
Survey your home
First, we discuss your rooms, heating and hot-water use. Also, we inspect the boiler, supply, radiators and controls, so your Viessmann boiler installation has a clear starting point.
Compare the options
Next, we explain suitable ranges, outputs and controls. Therefore, your quotation sets out the chosen boiler, fitting work and any system changes. You can then decide with a clear picture of the work.
Prepare and fit carefully
Then, we prepare the heating system and address cleaning and filtration. In addition, we fit the boiler, flue, pipework and controls with attention to service access and the finished appearance.
Commission and hand over
Finally, we test and commission the appliance, complete the records and explain the settings. Also, we show you the heating schedule and everyday controls, then help you arrange ongoing servicing.
INDEPENDENTLY REVIEWED
Heating work backed by hundreds of five-star reviews
For example, customers repeatedly mention punctual engineers, tidy workmanship and clear advice before, during and after their heating project.
The gas-boiler service was completed efficiently and the certificate arrived by email almost immediately.
An older-property boiler upgrade finished on time, with tidy workmanship, punctual attendance and a flexible approach.
A last-minute boiler service was arranged quickly and completed efficiently by a team the customer readily recommends.
Review totals checked September 2026. Read the complete independent feedback on Google and Which? Trusted Traders.
Viessmann boiler questions
Can Oxyplumb install a Viessmann boiler?
We install Viessmann boilers across Oxfordshire, including straightforward replacements and wider heating upgrades. First, tell us about your current appliance so we can understand what you want to improve.
Which boiler output should I choose?
First, consider your home’s heating demand and hot-water use. Therefore, we assess the property, water supply and existing system before recommending an output. After all, the largest model is not automatically the right choice.
Can you replace a boiler from another brand?
Your existing boiler can be from another brand, because we plan the replacement around your heating system. First, we inspect the system, explain the options and quote for the work needed to fit your chosen Viessmann replacement.
Do you service and repair other boiler makes?
Our maintenance work also covers a broad range of boiler manufacturers, including older and less familiar makes. First, tell us your boiler’s make, model and fuel, so we can arrange the right engineer.
Local Viessmann boiler installation and ongoing care
For example, our team covers Faringdon, Wantage, Abingdon, Stanford in the Vale, Oxford, Bampton, Clanfield, Witney, Cumnor, Carterton, Uffington and Kingston Bagpuize. Choose your area to find its dedicated installation, servicing and repair pages.
Also, we maintain and repair boilers from a broad range of manufacturers. Explore our boiler servicing and boiler repair services, or compare our other manufacturer guides below.
Ready to choose your new Viessmann boiler?
First, tell Oxyplumb about your home and the work you have in mind. Then, we will help you choose the right boiler and provide a clear installation quotation.