Granted Patent B2

US 8,479,439 · App. 13/080,970 · Granted Jul 9, 2013

Abstract

Claims (33)

1. A method for killing pests, comprising:

positioning a heating unit in an affected area, the heating unit comprising:

a fuel source, the fuel source comprising a fuel tank;

a first air inlet configured to receive a first air flow from an affected area;

a second air inlet configured to receive a second air flow from an unaffected area;

a premix system operable to generate an air-fuel mixture by mixing a fuel flow received from the fuel source with the second air flow received from the second air inlet;

a burner operable to generate combustion air by combusting the air-fuel mixture; and

a thermostat positioned in the first air inlet, the thermostat operable to measure an air temperature at the first inlet; and

a controller configured to communicate with the thermostat;

wherein the fuel tank, the premix system, the burner, the thermostat, and

the controller are housed in a moveable cabinet;

orienting the heating unit in the affected area such that the first air inlet of the heating unit may receive the first air flow from the affected area;

connecting a first end of an air duct to the second air inlet of the heating unit;

positioning a second end of the air duct outside the affected area such that the second air inlet may receive the second air flow from outside the affected area;

connecting the fuel source to the heating unit, the fuel source providing the fuel flow to the heating unit, the heating unit configured to:

mix the fuel flow with the second air flow via the premix system to generate an air-fuel mixture;

combust the air-fuel mixture via the burner to generate combustion air;

mix the combustion air with the first air flow subsequent to combustion to generate a heated air flow; and

discharge the heated air flow into the affected area; and

measuring the air temperature at the first air inlet using the thermostat positioned in the first air inlet; and

controlling the discharge of the heated air flow into the affected area with the controller, based on the measured air temperature at the first air inlet, such that the affected area is heated to a target temperature.

2. The method of claim 1 , wherein the target temperature is greater than or equal to 120 degrees Fahrenheit.

3. The method of claim 1 , wherein the affected area comprises a dwelling located in a building at above ground level.

4. The method of claim 1 , wherein:

the fuel tank comprises a propane tank; and

the fuel flow comprises a flow of propane gas.

5. The method of claim 4 , wherein the flow of propane gas comprises between 10,000 and 40,000 BTUs of energy.

6. The method of claim 1 , wherein the second air flow is drawn into the second air inlet at a flow rate sufficient to combust at least a portion of the fuel flow provided by the fuel source.

7. The method of claim 6 , wherein the one or more air movers are operable to distribute at least a portion of the heated air flow discharged by the heating unit along a floor of the affected area.

8. The method of claim 1 , wherein the second air flow is drawn into the second air inlet at a flow rate sufficient to combust substantially all of the fuel flow provided by the fuel source.

9. The method of claim 1 , further comprising positioning one or more air movers adjacent to the heating unit, the one or more air movers operable to distribute at least a portion of the heated air flow discharged by the heating unit within the affected area.

10. The method of claim 1 , further comprising separating a plurality of contaminated items within the affected area to ensure that each of the plurality of contaminated items is heated throughout to the target temperature.

11. The method of claim 1 , further comprising individually handling and exposing a contaminated item to the heated air flow within the affected area to ensure that the contaminated item is heated throughout to the target temperature.

Assignments (11)