Viessmann Vitodens 200-W Combi &Viessmann Vitodens 200-W System:
The Viessmann Vitodens 200-W Combi Boilers come in three different size output flow rates to suit different size homes; in 26KW, 30kW, and 35kW. 
The Viessmann Vitodens 200-W System Boilers come in four different size output flow rates to suit different size homes; 19kW 26KW, 30KW, and 35KW models.
This gas fired Combi boiler comes as one unit unlike The gas fired System boiler which has an extra hot water cylinder.
You may choose the system boiler if you have a traditional home which was originally built with space in the airing cupboard for the hot water tank and the loft for the cold water cylinder.
The other reason you may choose the system boiler is if you need water to various taps at once, the combi boiler may struggle with that job as the water comes from the mains. 
The system boiler stores the water in the cylinder so would not struggle supplying various taps at once.
If you are looking to update your heating system for a high energy efficiency boiler, continue to read the guide below.
Is this boiler suitable for my home:
This condensing, wall mounted combi boiler and system boiler both have an ErP A rating for efficiency. 
Vitodens 200-W boilers are suited to homes with three to five bedrooms and multiple bathrooms as a combi boiler. The system boilers are suited to homes with two to six bedrooms and multiple bathrooms. Both systems should suit most properties.
If you would like a quiet operation heating system this could be the boiler range for you.
Cost & Warranty:
The cost would vary depending on which gas type boiler you chose, combi or system, and which out put flow rate you would need to run your home comfortably.
Your Gas Safe engineer would help you decide which options you need to go for.
The boilers starting price is around £1350.00 including VAT but not including installation fees. Installation fees will vary depending on if it is a replacement you need or a new boiler. 
If you would prefer your boiler price to include installation fees, go to boilercentral.com
The Vitodens 200-W Combi boiler and System boiler comes with a standard warranty of five years and has an option to extend to ten years by following extra guidelines and maybe a fee will be included.
Warranty is great for peace of mind, Boiler Central are the only company in the UK to offer a massive 15 year warranty for all Viessmann boilers. 
Boiler Central also offer to have your boiler fitted before you pay a penny!!
Click Here to find out more.
Controls:
This Viessmann Vitodens 200-W boiler which is optionally available as Combi or System boiler offers a great range of controls.
A stainless steel inox radial heat exchanger and matrix cylinder burner ensure fuel used is converted to turn 98% of fuel to heat and extend the life of the boiler. 
The Lambda Pro Control Plus combustion controller automatically adapts to the different fuel types used; natural gas, LPG or biogas.
The boiler is user-friendly, is 7 colour touchscreen, WiFi inter face is integrate for internet and offers the latest environmentally friendly MatriX-Plus burner.
You are able to download the ViCare app to your smartphone or tablet so you can control your central heating system wherever you are.
The modulation range has been extended from 1:3 to 1:4 meaning higher efficiency and reduced bills will be available with this boiler.
For the System boiler external control should be considered. You have the option to choose a constant temperature controller (Vitotronic 100) or a weather-compensated controller (Vitotronic 200.
Both Vitotronic controls come with a timer for a seven day week.
Viessmann Vitodens 200-W COMBI Model & Cost
| MODEL | TYPE | DIMENSIONS | MAXIMUM FLOW RATE | OUTPUT | EFFICIENCY RATING | TYPICAL PRICE |
|---|---|---|---|---|---|---|
| Vitodens 200-W Combi 26kW | Combi | H – 850 mm W – 450 mm D – 360 mm |
N/A | 26 kW | A | £1150 |
| Vitodens 200-W Combi 30kW | Combi | H – 850 mm W – 450 mm D – 360 mm |
N/A | 30 kW | A | £1220 |
| Vitodens 200-W Combi 35kW | Combi | H – 850 mm W – 450 mm D – 360 mm |
N/A | 35 kW | A | £1295 |
BOILER INFORMATION |
|
|---|---|
| Stainless steel heat exchanger (Inox-Radial) | Reduce maintenance costs and increasing the life time of the boiler |
| Extended Modulation Range to 1:4 | Higher efficiency and greater savings |
| SEDBUK A Rating | Lower Gas Bills |
| Various Kw Heating Output – 26kW, 30kW, and 35kW | Various Home Sizes |
| New cylinder burner with MatriX surface | Long service life |
| 5 inch colour touchscreen (Vitotronic control) | Ease of use |
| Which Rating 76% | Based on reliability, satisfaction & ease of repair |
| The boiler comes with a standard 5 year guarantee on parts and labour. | Peace of Mind |
Viessmann Vitodens 200-W System Boiler MODEL & COST
| MODEL | TYPE | DIMENSIONS | MAXIMUM FLOW RATE | OUTPUT | EFFICIENCY RATING | TYPICAL PRICE |
|---|---|---|---|---|---|---|
| Vitodens 200-W System 19kw | System | H – 850 mm W – 450 mm D – 360 mm |
N/A | 19 kW | A | £1191 |
| Vitodens 200-W System 26kw | System | H – 850 mm W – 450 mm D – 360 mm |
N/A | 26 kW | A | £1294 |
| Vitodens 200-W System 30kw | System | H – 850 mm W – 450 mm D – 360 mm |
N/A | 30 kW | A | £1394 |
| Vitodens 200-W System 35kw | System | H – 850 mm W – 450 mm D – 360 mm |
N/A | 35 kW | A | £1444 |
BOILER INFORMATION: |
|
|---|---|
| High modulation ratio of 1:6 | Energy Efficient helping reduce wear & tear |
| SEDBUK A Rating | Lower gas bills |
| MatriX pre-mix cylinder burner and an integral AquaBloc hydraulic unit | Ease of maintenance and service |
| Various Kw Heating Output -26KW, 30KW, and 35KW | For larger homes |
| Very Quiet Boiler | Can be installed in living areas |
| Optional external weather detector | Helps manage costs and comfort |
| Advanced technology | Energy efficiency & maintenance cost savings |
| Which Rating 76% | Based on reliability, satisfaction & ease of repair |
| LCD touchscreen | Ease of use |
| Compact size | Easy Storage |
| Lightweight | Ease of installation |
| 5- year parts and labour warranty as standard | Peace of Mind |
Conclusion:
The Viessmann Vitodens 200-W boiler available as a System or Combi boiler is a quiet, efficient, environmentally friendly boiler which is known to be reliable and last for a long period of time. 
Your Gas Safe engineer will recommend which type of boiler, which size output and which fuel you will need to run your home to the best ability.
All Viessmann boilers are recommended by the Energy Savings Trust which instantly tells you your boiler is efficient and will reduce your fuel bills. 
Overall this German manufactured boiler range which can have up to 15 years of warranty with Boiler Central is a well rated boiler with a Which? score of 76% for overall performance, reviews and reliability.
This boiler range would be a winner.