Water heater

A combination combustion air and flue gas exhaust system for a water heater comprising:

• (a) a manifold assembly (16) including a box section (30), a flue gas port (32), a combustion air port (34) and a combustion air inlet (36), said combustion air inlet collar (36) communicating with said combustion air port (34) through the interior of said box section (30);
• (b) a combination combustion air inlet and flue gas outlet assembly (14) including a combustion air inlet tube member (18), a flue gas outlet tube member (20) mounted concentrically inside said tube member (18), said tube member (18) connected at one end to said box section (30), said tube member (18) communicating with the atmosphere and its other end, said tube member (20) connected at one end to said flue gas port (32) and communicating with the atmosphere at its other end;
• (c) a combustion air assembly box (44) mounted on the top of the water heater;
• (d) a combustion air tube (42) connected at one end to said combustion air port (34) and connected at its other end to said air assembly box (44);
• (e) a flue gas tube (38) communicating at one end with the flue gas outlet of the water heater and connected at the other end to said flue gas port (32);
• and
• (f) an air blower operable to draw combustion air into the water heater through said combustion air tube (42) and further operable to draw flue gas out of the water heater through flue gas outlet tube (38).

A water heater having a combustion chamber, a combustion air inlet and a flue gas outlet located at the top of the water heater comprising:

• (a) a manifold assembly (16) including a box section (30), a flue gas port (32), a combustion air port (34) and a combustion air inlet (36), said combustion air inlet (36) communicating with said combustion air port (34) through the interior of said box section (30);
• (b) a combination combustion air inlet and flue gas outlet assembly (14) including a combustion air inlet tube member (18), a flue gas outlet tube member (20) mounted concentrically inside said tube member (18), said tube member (18) connected at one end to said box section (30), said tube member (18) communicating with the atmosphere and its other end, said tube member (20) connected at one end to said flue gas port (32) and communicating with the atmosphere at its other end;
• (c) a combustion air assembly box (44) mounted on the top of the water heater;
• (d) a combustion air tube (42) connected at one end to said combustion air port (34) and connected at its other end to said air assembly box (44);
• (e) a flue gas tube (38) communicating at one end with the flue gas outlet of the water heater and connected at the other end to said flue gas port (32);
• and
• (f) an air blower operable to draw combustion air into the water heater through said combustion air tube (42) and further operable to draw flue gas out of the water heater through flue gas outlet tube (38).

A water heater having a combustion chamber, a combustion air inlet and a flue gas outlet comprising:

• (a) an air blower (40) mounted on a water heater;
• (b) a combustion air tube (38) connected to said air blower (40), said air blower (40) operable to draw fresh combustion air through said tube (42) and then into the combustion chamber of the water heater;
• (c) a flue gas tube (38) connected to the flue gas outlet of the water heater;
• (d) a manifold assembly (16) communicating with said flue gas tube (38) and said combustion air tube (42), said manifold assembly (16) adapted to receive and conduct combustion air to said combustion air tube (42), said manifold assembly (16) further adapted to receive flue gas from said flue gas tube (38);
• and
• (e) a combination combustion air inlet and flue gas outlet assembly (14) adapted to receive combustion air from the atmosphere and conduct said combustion air to said manifold assembly (16), said combination combustion air inlet and flue gas outlet assembly (14) further adapted to receive flue gas from said manifold assembly (16) and conduct said flue gas to the atmosphere.