Sealed system boilers unvented
system boiler (also known as a closed or sealed system boiler) works on the principle of stored hot water. This means that you will need an airing cupboard or other space for the hot water storage tank.
Although a tank is needed in the airing cupboard, a system boiler still needs less space than a traditional open vent or heating only boiler, which utilises a second tank in the loft. Also, many of the individual components of the heating and hot water system are built in, which means that installation is faster, neater, easier and more efficient.
With a system boiler you can run hot water from a range of outlets simultaneously, without someone else’s showing running cold on them. You will also get good water pressure.
A system boiler is a great choice for a larger home or family with hot water needs that can’t be met by a combi boiler, but who want to keep loft space free. You will need a tank in the airing cupboard though.
However, you’ll have to wait for water to be heated when you want it, and it could run out if it’s used too quickly.
most people with older systems such as open vent boilers choose an unvented sealed system for their central heating and hot water. Although it is more expensive than simply replacing your boiler with the old system, you will be able to free up more space in your home.
ecoTEC plus system boilers provide simple installation and unrivalled flexibility and are the most compact boiler ever developed by Vaillant.
ecoTEC plus system boilers have compact dimensions and one of the lowest weights in their class (from 34.8kg) - meeting the growing demand from installers and end users for smaller, lightweight appliances. The boilers are all SEDBUK Band 'A' rated and all models can easily be converted to run on LPG.
The CH (Central heating) heat output range from 4.9 - 12kW in the ecoTEC plus system 612 to 12.0 - 37.0kW for the ecoTEC plus system 637. All ecoTEC plus system boilers have a 2 year guarantee.
Features & benefits
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SEDBUK Band 'A' High condensing efficiency |
| Compact dimensions |
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Offers excellent siting versatility and easy installation |
| Large surface area stainless steel heat exchanger |
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Stainless steel heat exchanger allows more heat to be extracted by recapturing otherwise wasted heat |
| Built-in status / diagnostic display |
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Provides comprehensive status and diagnostic information and simple push button programming Simplifies commissioning and servicing |
| Single electronic circuit board |
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Vaillant reliability,performance,Quality all built in as standard.
Choose the right system for your home 
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