Abstract: A heat trap apparatus for a water heater is provided. The heat trap apparatus includes a tubular body having a length defined between a first end and a second end, a liner disposed within the tubular body, and a heat trap baffle assembly having a tubular housing coaxially disposed within the liner to inhibit convective fluid flow therethrough. The liner has a length greater than the length of the tubular body and has an outer surface engages with an inner surface of the tubular body using an interference fit. The liner includes a first end engaging with a peripheral edge of the first end of the tubular body and a second end extending beyond a peripheral edge of the second end of the tubular body for a desired length to connect with a conduit.

Abstract: The present disclosure is directed to a tankless water heater and systems and methods of using the same. The tankless water heater embodiments of the present disclosure can be configured to have a plurality of independently operable heat exchangers that can be used individually or collectively, in any combination, to heat water based on the level of demand for hot water. Embodiments can be configured for randomly selecting which heat exchangers are used to heat the incoming water. Embodiments of the present disclosure can also be configured to flow water through heat exchangers that are not being used to heat water and direct such water to a recirculation loop.

Abstract: The present disclosure is directed to a tankless water heater and systems and methods of using the same. The tankless water heater embodiments of the present disclosure can be configured to have a plurality of independently operable heat exchangers that can be used individually or collectively, in any combination, to heat water based on the level of demand for hot water. Embodiments can be configured for randomly selecting which heat exchangers are used to heat the incoming water. Embodiments of the present disclosure can also be configured to flow water through heat exchangers that are not being used to heat water and direct such water to a recirculation loop.