Patent ID: 7270098

Claim:
A heater for a liquid, the heater having a combustion chamber, a jacket for the liquid extending about the combustion chamber and a burner head assembly connected to the combustion chamber, the burner head assembly including a housing having a burner mounted thereon and a hollow interior, a control module and a fan being mounted in the hollow interior, the fan being connected to an electric motor, a compressor and a fuel pump being mounted on the housing, the compressor and the fuel pump being operatively connected to the electric motor, the control module including a speed control for the motor which maintains the heater at a specified level of operation, the speed control including sensor in the interior of the housing which responsive to rotational speeds of the fan, the fan including a fan blade assembly rotated by the motor, a device being mounted on the fan blade assembly which triggers the sensor on each rotation of the fan blade assembly, thereby indicating rotational speeds of the fan.