Fuel-fired water heated with combination drainage pan and combustion air flow control apparatus

Fuel-fired water heater apparatus comprising:

• a water heater body having a lower end portion for supporting said body on a horizontal support surface, said lower end portion having an inlet formed therein;
• a fuel burner carried by said body, above said air inlet, said fuel burner being operative to receive and combust a mixture of fuel from a source thereof and combustion air flowing upwardly through said air inlet;
• said fuel burner, when said water heater body is operatively positioned on said horizontal support surface, being less than 18" above said support surface:
• means, including valve means externally mounted on said water heater body, for receiving fuel from a source thereof and supplying the received fuel to said burner means;
• combination drainage pan and combustion air flow control means for receiving and draining away water leaking from said water heater body, and for assuring that burner combustion air entering said air inlet is supplied thereto from a location at least approximately 18" above the floor, said combination drainage pan and combustion air flow control means including an open-topped drain pan structure having:
• a bottom wall positionable on the floor and upon which said leg means may be rested,
• a vertical side wall portion sized and configured to outwardly circumscribe a lower end portion of said water heater body with an upper end of said vertical side wall portion at least approximately 18" above the floor, said vertical side wall portion being configured in a manner such that, when said lower end portion of said water heater body is operatively positioned within said drain pan structure, said vertical side wall portion defines a vertical combustion air flow passage outwardly circumscribing said lower end portion of said water heater body, and said valve means, and opening outwardly from said pan structure through its open upper end, and
• outlet means connected to a lower end section of said vertical side wall portion and operative to drain away water leaking from or adjacent said water heater body and received in said drain pan structure;
• and
• access door means, associated with said vertical side wall portion of said drain pan structure, for selectively providing access to said valve means.

Fuel-fired water heater apparatus comprising:

• a water heater body having a lower end portion for supporting said body on a horizontal support surface, said lower end portion having an air inlet formed therein;
• a fuel burner carried by said body, above said air inlet, said fuel burner being operative to receive and combust a mixture of fuel from a source thereof and combustion air flowing upwardly through said air inlet,
• said fuel burner, when said water heater body is operatively positioned on said horizontal support surface, being substantially less than 18" above said horizontal support surface;
• means, including valve means externally mounted on said water heater body, for receiving fuel from a source thereof and supplying the received fuel to said fuel burner;
• combination drainage pan and combustion air flow control means for receiving and draining away water leaking from said water heater body, and for assuring that burner combustion air entering said air inlet is supplied thereto from a location at least approximately 18" above the floor, said combination drainage pan and combustion air flow control means including a drain pan structure having:
• a bottom wall positionable on the floor and upon which said leg means may be rested,
• a vertical side wall portion sized and configured to outwardly circumscribe said valve means and a lower end portion of said water heater body, the upper end of said vertical side wall portion being at least approximately 18" above the floor, said vertical side wall portion being configured in a manner such that, when said lower end portion of said water heater body is operatively positioned within said drain pan structure, said vertical side wall portion defines a vertical combustion air flow passage outwardly circumscribing said lower end portion of said water heater body,
• a top end closure member configured to outwardly circumscribe said water heater body, and
• an air inlet formed in an upper end portion of said drain pan structure and connectable to air supply conduit means for supplying combustion air from a source thereof to the interior of said drain pan structure;
• access door means, associated with said vertical side wall portion of said drain pan structure, for selectively providing access to said valve means;
• and
• outlet means connected to a lower end section of said vertical side wall portion and operative to drain away water leaking from and adjacent said water heater body and received in said drain pan structure.

For use with a fuel-fired water heater having a body with a lower end provided with leg means for supporting the body on a floor with the lower body end spaced upwardly from the floor;

• an air inlet formed in the lower body end;
• a fuel burner carried by the body above its lower end and operative to receive and combust a mixture of fuel from a source thereof and combustion air flowing upwardly through the air inlet;
• and means, including a fuel valve externally mounted on a side portion of the body, for receiving fuel from a source thereof and supplying the received fuel to the fuel burner, combination drainage pan and combustion air flow control apparatus for receiving and draining away water leaking from the water heater body, and for assuring that burner combustion air entering the body inlet opening is supplied thereto from a location at least 18" above the floor, said combination drainage pan and combustion air flow control means comprising a drain pan structure having:
• a bottom wall positionable on the floor and upon which said leg means may be rested;
• a vertical side wall portion sized and configured to outwardly circumscribe said valve means and a lower end portion of said water heater body with an upper end of said vertical side wall portion being at least 18" above the floor;
• outlet means connected to a lower end section of said vertical side wall portion and operative to drain away water leaking from said water heater body and received in said drain pan structure;
• and
• access door means, associated with said vertical side wall portion of said drain pan structure, for selectively providing access to said valve means.