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A water heater apparatus includes a water conduit having an inlet and an outlet. A primary heat exchanger has a water side defining a portion of the water conduit. A burner is operatively associated with the primary heat exchanger for heating water in the water side of the primary heat exchanger. A

A water heater apparatus includes a water conduit having an inlet and an outlet. A primary heat exchanger has a water side defining a portion of the water conduit. A burner is operatively associated with the primary heat exchanger for heating water in the water side of the primary heat exchanger. A variable flow blower provides pre-mixed combustion air and fuel gas to the burner at a controlled blower flow rate within a blower flow rate range. This apparatus allows the heat output of the water heater to be continuously varied within a substantial flow rate range having a turn down ratio of as much as four to one.

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A water heater apparatus includes a water conduit having an inlet and an outlet. A primary heat exchanger has a water side defining a portion of the water conduit. A burner is operatively associated with the primary heat exchanger for heating water in the water side of the primary heat exchanger. A

A water heater apparatus includes a water conduit having an inlet and an outlet. A primary heat exchanger has a water side defining a portion of the water conduit. A burner is operatively associated with the primary heat exchanger for heating water in the water side of the primary heat exchanger. A variable flow blower provides pre-mixed combustion air and fuel gas to the burner at a controlled blower flow rate within a blower flow rate range. This apparatus allows the heat output of the water heater to be continuously varied within a substantial flow rate range having a turn down ratio of as much as four to one. lution and has a tangentially located feed (19), a core (11) which extends centrally in the casing (16) at the level of the feed (19), and collection means (20), for the particulate material, located at the bottom of the casing (16). 10. Air unit according to claim 9, wherein the collection means comprise a container (20) detachably connected to the bottom of the casing (16). 11. Air unit according to claim 10, wherein the container (20) is connected to the casing (16) via a flap or slider (25). 12. Air unit according to claim 9, wherein the circulating means centrifugal pump which has a volute casing (9) as well as an impeller (13) that can be rotated with respect to the volute casing (9) and is connected to a motor (14), and the volute casing (9) of the centrifugal pump (10) is connected to the top of the casing (16) of the cyclone (12) and the core (11) is fixed to a first frame (4). 13. Air unit according to claim 1, wherein a dust filter (28) is provided for discharging purified surplus air. 14. Air unit according to claim 1, wherein heating means are provided for drying the coating machine (2). 15. Air unit according to claim 9, wherein the collection means (20) have a level detector (45, 40). 16. In combination, a coating machine (2) intended for applying particulate material to edible products (42), comprising a housing (44), a conveyor belt (41), that extends through the housing (44) and is provided with openings and on which the products (42) can be transported through the housing (44), in which housing (44) feed means (43) are located for feeding particular material onto the products (42) located on the conveyor belt (41), and an air unit for the removal of surplus particulate coating material that is present on the products (42) that are in the coating machine (2), comprising at least one blowing member (37) for blowing surplus particulate coating material of the products (42), at least one suction member (38) for drawing off air, with particulate material contained therein, from the coating machine (2), separating means (12, 28) for removing particulate material from the air drawn off to the blowing member (37), wherein the blowing member (37) is located above the conveyor belt (41) for blowing air into the housing (44) and over the conveyor belt (41), and the suction member (38) for the air unit (1) is connected to the housing (44) for drawing air out of the housing (44). 17. Combination according to claim 16, wherein partitioning means (39, 40) are provided in the housing (44), such that each blowing member (37) is on one side of the partitioning means and the feed means (43) are on the other side of the partitioning means (39, 40). 18. Method for operating the combination according to claim 16, comprising delivering a quantity of air per unit time to the housing that is less than the quantity of air removed from the housing in such a way that a vacuum is generated in the housing. 19. Method for operating the combination according to claim 17, comprising delivering a quantity of air per unit time to the housing that is less than the quantity of air removed from the housing in such a way that a vacuum is generated in the housing. 6082300, 20000700, Futch, 119/051.11; US-6158391, 20001200, Simmonetti, 119/707; US-6237538, 20010500, Tsengas, 119/707; US-6273027, 20010800, Watson et al., 119/712 A table comprising a table top including a shell and a core, the shell being formed to include an interior region, the core being positioned in the interior region to strengthen the table top, a leg to support the table top, and a leg anchor coupled to the leg and embedded in the core to anchor the leg to the table top, wherein the leg anchor includes an undulating member coupled to the leg and embedded in the core, the undulating member includes a ridge, a larger trough extending from a first side of the ridge, and first and second smaller troughs extending from a second side of the ridge opposite to the first side and the troughs are coupled to the leg. 7. The table of claim 6, wherein the ridge has a generally inverted U-shaped cross-section and each of the troughs has a generally U-shaped cross-section. 8. The table of claim 6, wherein the ridge includes first and second end portions, the first smaller trough is coupled to the first end portion, the second smaller trough is coupled to the second end portion and is spaced apart from the first smaller trough to provide a space therebetween to receive the leg. 9. The table of claim 6, wherein the leg anchor includes a larger flange and a smaller flange, the larger flange extends from the larger trough, and the smaller flange extends from one of the smaller troughs. 10. The table of claim 9, wherein the larger flange includes a first portion and a second portion wider than the first portion, the first portion extends from the larger trough and is formed to include a smaller aperture, the second portion extends from the first portion and is formed to include a larger aperture, and the smaller flange is formed to include a larger aperture. 11. A table comprising a table top including a shell and a core, the shell being formed to include an interior region, the core being positioned in the interior region to strengthen the table top, a leg to support the table top, and a leg anchor coupled to the leg and embedded in the core to anchor the leg to the table top, wherein the leg anchor includes a flange embedded in the core and formed to include an aperture filled by the core. 12. A table comprising a table top including a shell and a core, the shell being formed to include an interior region, the core being positioned in the interior region to strengthen the table top, a leg to support the table top, and means for anchoring the leg to the table top, the anchoring means being coupled to the leg and embedded in the core. 13. The table of claim 12, wherein the anchoring means is a plate. 14. The table of claim 12, wherein the anchoring means includes an undulating member and first and second flanges extending from the undulating member, the undulating member and the flanges are embedded in the core, and the undulating member is coupled to the leg. 15. The table of claim 14, wherein the shell is formed to include a recessed portion receiving a portion of the leg, the undulating member mates with the recessed portion and is formed to include a channel filled by the core, and each of the first and second flanges is formed to include an aperture for material of the core to flow therethrough during assembly of the table top. 16. A table comprising a table top including a shell and a core, the shell including an upper shell member and a monolithic lower shell member cooperating with the upper shell member to provide an interior region, the core being positioned in the interior region to strengthen the table top, the lower shell member providing an underside of the table top and including a stiffening rib arrangement and a rim coupled to the upper shell member, the stiffening rib arrangement and the rim cooperate to provide an elongated first leg-receiving channel and a first leg coupled to the table top and arranged to extend in the first leg-receiving channel, wherein the stiffening rib arrangement includes an X-shaped inner stiffening rib arrangement and an outer