This European Standard 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 sanitary uses, hereafter called "water heaters". This European Standard applies to water heaters:- of types AAS, B11, B11BS, B12, B12BS, B13, B13BS, B14, B22, B23, B32, B33, B44, B52, B53, C11, C12, C13, C21, C22, C23, C32, C33, C42, C43, C52, C53, C62, C63, C72, C73, C82and C83 according to CEN/TR 1749; - fitted with atmospheric burners; - equipped with atmospheric burners assisted by a fan for the supply of combustion air or evacuation of combustion products or fully premix burners; - using one or more combustible gases corresponding to the three gas families and at the pressures stated in accordance to EN 437; - of nominal heat input not exceeding 70 kW; - with an ignition burner or with direct ignition of the main burner. In this European Standard, the heat inputs are expressed in relation to the net calorific value (Hi). This European Standard does not contain all the requirements necessary for; - boiling water appliances; - appliances intended to be connected to a mechanical means of evacuating the combustion products; - appliances which fulfil a dual role of space heating and heating water for sanitary use; - appliances making use of the heat of condensation of the water contained in the combustion products; - water heaters of types B21, B31, B41, B42, B43 and B51. This European Standard only covers water heaters where the fan, if any, is an integral part of the appliance. This European Standard; - does not apply to appliances not intended to be connected to a flue when they are not fitted with an atmosphere sensing device; - takes account of the information given in Technical Report CR 1472:1994 with respect to marking. The main symbols used in this European Standard are summarized in Annex F.
EN 26:2015 Referenced Document
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EN 26:2015 history
2023EN 26:2023 Gas-fired instantaneous water heaters for the production of domestic hot water
2016EN 26:2015/PRA1:2016 Gas-fired instantaneous water heaters for the production of domestic hot water
2015EN 26:2015 Gas-fired instantaneous water heaters for the production of domestic hot water
1997EN 26:1997/A1:2000 Gas-Fired Instantaneous Water Heaters for the Production of Domestic Hot Water, Fitted with Atmospheric Burners Ratified European Text; Amendment 1: 10/2000
1997EN 26:1997 Gas-Fired Instantaneous Water Heaters for the Production of Domestic Hot Water@ Fitted with Atmospheric Burners (Incorporating Corrigendum July 1998; Incorporates Amendments A1: 2000 and A2: 2004)
1988EN 26:1977/A6:1988 Gas burning appliances for instantaneous production of hot water for domestic use; amendment to EN 26:1977.09
1985EN 26:1977/A5:1985 Gas burning appliances for instantaneous production of hot water for domestic use; amendment EN 26:1977.09
1984EN 26:1977/A4:1984 Gas burning appliances for instantaneous production of hot water for domestic use
1984EN 26:1977/A3:1984 Gas burning appliances for instantaneous production of hot water for domestic use
1977EN 26:1977 Gas burning appliances for instantaneous production of hot water for domestic use