Heating device for heating air

A heating device for heating air,

• comprising a primary heat source (10), a heat exchanger (2) and a housing (3),
• wherein the heating device is configured for use in a travel trailer or a motorhome,
• wherein the primary heat source (10) is a gas or diesel burner,
• wherein the heat exchanger (2) surrounds the centrally arranged primary heat source (10),
• wherein the heat exchanger (2) comprises an interior space (22) for receiving the primary heat source (10) and transfers thermal energy generated by the primary heat source (10) to the air, and
• wherein the heat exchanger (2) includes a plurality of holding elements (21) that are radially spaced apart, arranged around the interior space (22), and serve to receive a respective electric heating element (11) as a secondary heat source (2),
• characterized in that
• the heat exchanger (2) consists of a first heat exchanger unit (201) and a plurality of second heat exchanger units (202), each for a respective electric heating element (11),
• in that the first heat exchanger unit (201) and the second heat exchanger units (202) include contact profiles (23) corresponding to each other for a releasable mechanical and/or direct thermal connection,
• in that the housing (3) and the first heat exchanger unit (201) define an air duct (30) for the air to be heated, and
• in that the first heat exchanger unit (201) is arranged within the housing (3) such that the plurality of second heat exchanger units (202) are insertable into the air duct (30) so as to be symmetrical to each other.