Burn pot for furnace

1. A furnace comprising:

a combustion chamber;

a burn pot within the combustion chamber further comprising:

a sidewall; and

a plate translatable through an internal volume of the burn pot positioned between the ends of the sidewall, the plate translatable between a first position and a second position, wherein the plate has an opening therein with an area at least as large as a cross-sectional area of the burn pot when in a first position and includes an area capable of covering the cross-sectional area of the burn pot when the plate is in a second position, the plate further including a ramp positioned near the opening in the plate; and

a movable floor, wherein the plate is moved to form separate volumes of the burn pot.

2. The furnace of claim 1 wherein the movable floor is movable between a first position and a second position.

3. The furnace of claim 1 wherein the movable floor is movable between a first position and a second position, the movable floor having an opening therein having a cross-sectional area at least as large as the cross-sectional area within the sidewall and proximate the movable floor.

4. The furnace of claim 1 wherein the movable floor is movable between a first position where the movable floor has a grill portion therein, the grill portion positioned near an end of the burn pot, and a second position where the movable floor has an opening therein.

5. The furnace of claim 1 wherein the sidewall includes openings therein for directing air entering the burn pot.

6. The furnace of claim 1 further comprising an actuator for moving the movable floor.

7. The furnace of claim 1 wherein the plate translatable through an internal volume of the burn pot moves with the movable floor.

8. The furnace of claim 1 further comprising an actuator for moving the translatable plate.

9. The furnace of claim 1 further comprising an actuator for moving the translatable plate and the movable floor substantially simultaneously.

10. The furnace of claim 1 wherein the sidewall further comprises:

a first sidewall portion; and

a second sidewall portion

the plate interposed between the first sidewall portion and the second sidewall portion, the plate capable of a position where the inside surface of the opening in the plate is substantially contiguous with the inside surface of the burn pot.

11. The furnace of claim 10 wherein the plate includes a portion capable of separating the first sidewall portion from the second sidewall portion.

12. The furnace of claim 10 wherein the plate includes a portion capable of separating the first sidewall portion from the second sidewall portion, wherein the portion includes a plurality of grill openings therein.

13. The furnace of claim 10 wherein the plate includes an actuator for translating the translatable plate.

14. The furnace of claim 10 wherein the movable floor includes a grill in a first area and has an opening therein in a second area.

15. The furnace of claim 14 further comprising an actuator for moving the movable floor between at least a first position and a second position, wherein the grill is positioned near an end of the second portion of the burn pot when in a first position and wherein the opening is positioned near an end of the second portion of the burn pot when in a second position.

16. The furnace of claim 1 further comprising an actuator for moving both the movable floor and the translatable plate.

17. The furnace of claim 16 wherein the actuator for moving the movable floor and the translatable plate substantially simultaneously.

18. The furnace of claim 10 further comprising an igniter in fluid communication with the burn pot.