At iHeat, like most of the boilers we have in stock, the majority of Viessmann boilers available, come with a ten year warranty. Allowing you to relax, knowing that in the unlikely event that something goes wrong with your boiler, you are covered.

Warranties may slightly differ by individual boilers, but we will let you know how long your warranty is during our online quote process.

*Top Tip*
To ensure your warranty remains valid, ensure you have your boiler serviced annually. iHeat can help arrange this for you!

As aforementioned, Viessmann prides itself on the efficiency of its boilers. The entire combi boiler range is rated energy efficiency class: A.

Another option you have when purchasing a new boiler, is a heat only boiler. Heat only boilers, commonly referred to as regular boilers, provide the heat that is then used within your home’s central heating system. Hot water is stored in large water tanks rather than shared heating and hot water. Regular boilers are more commonly found in bigger properties.

Open vent boiler systems provide both hot water and heating to your home/premises. An open vent system is usually made up of two water tanks in the loft space, a hot water storage cylinder and a separate pump. As aforementioned, they are usually a good solution for households with multiple bathrooms as they are capable of supplying a lot of hot water at once.

If you are interested in purchasing a brand new Viessmann boiler from iHeat, fill out a few details for a free, fixed price boiler quote. Alternatively, if you’d like to speak to a member of our friendly team for a quote, give us a call on 0333 305 6880 .

When buying a new boiler, it can be difficult to determine exactly what size boiler you require. The size of boiler you need can differ considerably depending on the size of home you live in, and your habits with heating & hot water.. With several kilowatt options on most of the boilers we stock, we have written the following guides to help you make the most informed decision possible:

For guides on specific house sizes, take a look at the following articles:

• Boilers for 2 Bedroom Homes
• Boilers for 3 Bedroom Homes
• Boilers for 4 Bedroom Homes
• Boilers for Apartments/Flats

If you are considering replacing your older boiler with a combi, or looking for a like-for-like swap, Viessmann is a brand you should consider.

We understand the different types of boilers available can be confusing, so here is a quick summary on what a Combi Boiler is here's an excerpt taken from our full guide - What Is A Combi Boiler:

Combi boilers, (short for 'combination boiler') are a type of boiler that combines a water heating system and a central heating unit into a single body, acting as a unified way to handle heating and hot water without needing two separate boilers.

Here is what Viessmann themselves have to say about their Combi Boilers:

“Our combi boiler range is designed for maximum energy efficiency. This means that by choosing a Viessmann combi boiler you will be saving on your energy bills and be helping to protect the environment. Our entire combi boiler range is rated energy efficiency class: A. All of the boilers we provide are built around our long established reputation for high quality heating systems and are equipped with the latest heating technology.”

Does your home have more than one bathroom? If you have a high demand for hot water, Viessmann’s range of system boilers may be the perfect choice for you. System boilers provide high pressure hot water to multiple taps & showers across a property.

It is worth noting that system boilers feature a storage tank, which will take up some space within the property. System boilers give you a greater hot water capacity than combi boilers.