IEC 62999:2016+A1:2021 applies to electrical underfloor heating of dwellings and all other buildings whose use corresponds to dwellings or is at least similar, having a maximum load bearing in use of 4 kN/m2. This Standard defines the main characteristics of electrical underfloor heating and establishes the method of testing of these characteristics as information for the user. This Standard does not deal with installation and safety requirements.