This brand is made and sold in China. The units have electronic controls but their website is no help.
This brand is from ISI TECHNOLOGY and features graphite electrodes instead of traditional elements. They are "smart" and can be purchased directly from their website. The model 1 is designed to replace an existing tank type water heater while the 1X is to be added to an existing water heater system to increase the system capacity. The guarantee on the units is not very good when compared to other brands.
These units are manufactured in the USA. The units are available in a variety of sizes and feature copper heat exchangers and stainless steel cases for durability. The units use press-fit water connections for ease of installation and use solid state electronic control. It is hard to understand why they do not offer a better warranty on the units especially on the heat exchanger.
The ADK M series features units with stainless steel heat exchangers for durability. They have digital modulating controls and are backed by a good warranty.
This brand is made in Poland and is available in Europe. They offer a variety of units and sizes of units to fit the needs of most homes. The units feature copper heat exchangers and modulating control but their website is not much help and does not have a stated guarantee for their products.
These water heaters are made in China. They offer a variety of models that use basic technology but the guarantee on the heat exchanger is not very good when compared to other brands.
This brand offers a wide selection of models that feature microprocessor based controls and LED screens. Their website is not much help and does not have a stated warranty policy.
The METRO MINI 18 units have electronic controls but they use 400 volt three phase power and the guarantee is not very good. The brand is a part of the NIBE GROUP and the units are sold on Denmark, Sweden, Norway, & Finland.
This brand is made in China and features basic enameled tank technology. They use copper elements but their website is not much help and does not have a stated guarantee.
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