scope:

Defines the specifications and test methods concerning the construction, safety, rational use of energy and fitness for purpose, and also the classification and marking of gas-fired instantaneous water heaters for the production of domestic hot water, hereafter called "water heaters". Applies to water heaters: - of types A_AS, B₁₁, B_11BS, C₁₁ and C₂₁; - fitted with atmospheric burners; - using one or more combustible gases corresponding to the three gas families in accordance with table 3 and at the pressure stated in tables 6 and 7 of 7.1.4.; - of nominal heat input not exceeding 45 kW; - with an ignition burner or with direct ignition of the main burner.