A vehicle heater includes a heat exchanger assembly unit (10) and a blower assembly unit (38). The heat exchanger assembly unit (10) has a first sealing surface (28) and the blower assembly unit (38) includes a second sealing surface (50), which is positioned opposite the first sealing surface (28) at a predefined location determined by the spacer arrangement (34). A sealing element (60) is clamped in between the first sealing surface (28) and the second sealing surface (50).