Patent ID: 8152515

Claim:
A heater apparatus comprising: a burner; an intake valve comprising: a valve housing comprising: a single input for receiving fuel from either a first fuel source at a first pressure or a second fuel source having a type of fuel different from the first fuel source at a second pressure different from the first pressure; a first output for directing fuel received from said first fuel source; a second output for directing fuel received from said second fuel source; and a valve body positioned within the valve housing and configured to permit fluid communication between the input and the first output or between the input and the second output; and a dual fuel pressure regulator comprising: a first regulator having a first pressure range configured to regulate pressure of the fuel from the first fuel source within a first pressure range; a second regulator having a second pressure range different from the first pressure range configured to regulate pressure of the fuel from the second fuel source within a second pressure range different from the first pressure range; and a pressure regulator casing that houses the first and second regulators, the pressure regulator casing comprising: a first inlet in direct fluid communication with the first output of the intake valve, for receiving fuel from the first output of the intake valve and for directing fuel from the first output to the first regulator; a second inlet in direct fluid communication with the second output of the intake valve for receiving fuel from the second output of the intake valve and for directing fuel from the second output to the second regulator; and a single outlet for directing fuel from the dual fuel pressure regulator toward the burner, the single outlet in fluid communication with both the first regulator and the second regulator; wherein the dual fuel pressure regulator has a single flow path between the first inlet and the outlet being through the first regulator, and a single flow path between the second inlet and the outlet being through the second regulator; wherein the intake valve is connected to the dual fuel pressure regulator such that there is a single fuel entry point, being the single inlet of the intake valve, and a single fuel exit point being the single outlet of the dual fuel pressure regulator.