Modular linear fireplace system, assemblies and methods

A modular linear fireplace unit, comprising:

• a first attachment end portion horizontally spaced from a second attachment end portion, the first attachment end portion having an interface configuration corresponding with the second attachment end portion and operatively couplable with an attachment end portion of a fireplace unit having the same construction as the modular linear fireplace unit;
• a base portion extending between the first and second attachment end portions and having a burner assembly and a gas line, the burner assembly in gaseous communication with the gas line to receive a fuel gas;
• a top portion extending between the first and second attachment end portions and vertically spaced from the base portion, defining a firebox between the base portion and the top portion in which combustion of the fuel gas by the burner assembly occurs during use;
• wherein the firebox has open end portions adjacent to the first and second attachment end portions providing a continuous elongated firebox when the modular linear fireplace unit is operatively coupled to the fireplace unit having the same construction as the modular linear fireplace unit;
• and
• a first end closure having a common configuration that mates with the second attachment end portion to close the open end portion adjacent to the second attachment end portion.

A modular linear fireplace unit, comprising:

• an interchangeable linear fireplace unit having:
• a first attachment end portion and a second attachment end portion spaced apart from the first attachment end portion;
• a top portion and a base portion extending between the first and second attachment end portions, wherein the top portion defines an upper portion of a combustion air passageway and an exhaust passageway, and wherein the base portion defines a lower portion of the combustion air passageway;
• an interior front divider and an interior rear divider, each extending between the first and second attachment end portions and between the top portion and the base portion, wherein the interior front and rear dividers are spaced apart from each other, defining a firebox;
• a burner assembly supported by the base portion and positioned adjacent to a bottom portion of the firebox;
• an exterior rear divider extending between the first and second attachment end portions and between the top portion and the base portion, and spaced apart from the interior rear divider, opposite the interior front divider, defining a middle portion of the combustion air passageway;
• and
• wherein the firebox has open end portions adjacent to the first and second attachment end portions providing a continuous elongated firebox when the interchangeable linear fireplace unit is operatively coupled to a second fireplace unit having the same construction as the modular linear fireplace unit;
• and
• wherein the lower portion is in gaseous communication with the firebox proximate to the burner assembly, and wherein the upper portion, the middle portion, and the lower portion are in gaseous communication adjacent to the first attachment end portion with the upper portion, the middle portion, and the lower portion, respectively, of the second fireplace unit when the interchangeable linear fireplace unit is operatively coupled to the second fireplace unit;
• wherein the exhaust passageway is in gaseous communication with the firebox and in gaseous communication adjacent to the first attachment end portion with the second fireplace unit when the interchangeable linear fireplace unit is operatively coupled to the second fireplace unit;
• and
• wherein, during use, combustion air passes through the combustion air passageway from the upper portion, through the middle portion, to the lower portion, and into the firebox where the combustion air is converted to exhaust air after combustion in the firebox and passes through the firebox to the exhaust passageway.