These boilers produce both domestic hot water and central heating. They are available in seven sizes to match the needs of the home. Their website is not much help and does not have a stated guarantee for the products.
This brand is made in Canada and is available in the USA as well. They feature wall mounted modulating boilers with advanced controls such as outdoor reset. The standard units are designed to stand alone in heating the home while the dual-energy models are designed to work with a gas or oil fired boiler. They use durable components such as a stainless steel tank and incoloy elements but they are not backed by a warranty that is as good as other brands.
This brand is available in Europe, Asia, and South America. They offer wall mounted units with step regulation to closely match the heating requirements of the home. They offer a domestic hot water heating option as well as "equitherm" regulation which controls the unit based on the weather. The units have an integrated 7 liter expansion tank as well as pump, and automatic air vent. The warranty on the units is not very good compared to other brands.
This brand is made in Canada and is available in the U.S. and Canada. The BTH ULTRA range features wall mounted units in sizes from 6 to 33kw and uses outdoor reset control for energy savings. They have a dealer locator map on their website.
The ELOMIN III UB boilers are made in Sweden and are sold worldwide. Their website is not much help and does not have a stated guarantee for their products.
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The ELM boilers are made in Austria and are available in a wide selection of sizes. Their website is not much help and does not have a stated warranty policy.