These burners with tangential ventilation are, in terms of dimensions and output, the smallest burners of the new line IDEA gas Low NOx Class 2 (< 120 mg/KWh) available in five different aluminium housings. NG35 burner can be arranged to use external combustion air on request. In this case the burner will be supplied with a watertight and airtight air intake, linked outside by means of a duct ten meters long. Back-pressure in combustion chamber (mbar)

TECHNICAL DETAILS Type Model Electric power supply 230 V 1N ac 230 V 1N ac 230 V 1N ac 230 V 1N ac 230 V 1N ac For the configuration of the gas train, see page 113. Suggested boiler drilling Burner flange ** Approximate values

Back-pressure in combustion chamber (mbar) 3,0 Back-pressure in combustion chamber (mbar) Back-pressure in combustion chamber (mbar) 3,0 0 Back-pressure in combustion chamber (mbar) Back-pressure in combustion chamber (mbar)

Minimum inlet gas pressure (mbar) Minimum inlet gas pressure (mbar) Minimum inlet gas pressure (mbar) Minimum inlet gas pressure (mbar) Minimum inlet gas pressure (mbar) Attention: the graph shows the value of the gas output (kW) against the corresponding pressure without the combustion chamber back pressure. To know the minimum gas pressure at gas train, in order to get the gas output, it is necessary to add the boiler back pressure to the value read on the curve.