Vaillant Boilers. Vaillant is a boiler brand steeped in history and traditions. The company was founded in 1874 in Germany and started making the world’s first gas-fired water boiler in 1894. Ever since that time they have been at the forefront of domestic heating development currently exploring renewable technologies such as ground source heat pumps and air to water systems alongside their traditional line of business. The best-selling Vaillant ecoTec pro boiler range consists of 22 different types of gas boiler with outputs from 12kW to 38kW.
Both boiler ranges are fitted with the highly rated Stainless Steel Giovanni Heat exchanger which is very reliable but more expensive than an aluminium and/or silicone based heat exchanger. The Ecotec Plus products are the more expensive higher end boilers. Below you can find more specific details on the different Vaillant EcoTEC boilers, and hopefully gain the understanding you need to make a decision on buying a new boiler for your home. Vaillant EcoTEC Plus.