Portable water heating module

A water heating module having a basin that supports at least two water heating units and provides communication of a first fluid that is water between the water heating units and isolation of a second fluid that is a combustion gas between the water heating units,

• the basin including at least one baffle plate that divides the basin into a plurality of chambers, each chamber configured to form a hydraulic seal with water between the remaining plurality of chambers, the hydraulic seal containing the combustion gas within the water heater unit generating the combustion gas;
• the baffle includes at least one equalization port that provides communication of water between the plurality of chambers;
• the basin includes a bottom and further includes a base that extends into each chamber and supports one water heating unit, the base having at least a portion that is spaced apart from the basin bottom to form an opening, the opening configured to permit water flow from the water heating unit to the basin;
• and
• the baffle includes a spillway that permits communication of water between the plurality of chambers, the equalization port providing a water communication level that is lower than an opening water communication level, and a spillway water communication level that is higher than the opening water communication level.