Air and gas feeder device for gas boilers

An air and gas feeder device for gas boilers, comprising an air-gas conveyance body comprising:

• a boiler coupling face configured to be coupled to a boiler at an intake duct of a boiler;
• an air intake port connected to an air discharge opening by means of an air passage, said air discharge opening leading out from said boiler coupling face;
• a gas intake port, configured to be fixed to a gas dispensing duct in fluid communication with a gas discharge opening, which leads out from said boiler coupling face;
• wherein the air discharge opening is coaxial to, and at least partially surrounded by, the gas discharge opening;
• wherein said air passage accommodates a flow diverter configured to divert an air flow in output from the air discharge opening in the direction of the gas in output from the gas discharge opening and to impart a rotation to said air flow;
• wherein said air discharge opening is formed between the flow diverter and an internal wall of the air passage.