a known fashion in order to provide heat to the fluid water within the boiler chamber 14 drain ports 18 may be selectively utilized to enable the draining of the boiler chamber 14 or the like as will be appreciated boiler fluid i e water is provided to and disposed within the boiler chamber 14 and is heated by the activity of the burner element 17 as is well known the burner element typically heats the water within the boiler chamber 14 until a predetermined water temperature is obtained during this heating process the water typically circulates about and around the boiler chamber 14 through natural convection with the warmer water raising to the upper portion 20 of the boiler chamber 14 it is therefore an important aspect of the present invention that cooler return inlet water is directed to the oblong inlet return port 16 which is in fluid communication with the boiler chamber 14 in doing so the present invention seeks to provide the time and turbulence needed to mix the warmer water within the upper portion 20 with the cooler return inlet water as will be described in more detail shortly fig2 is a reverse cross section view of the boiler 10 in which it can be seen that a flanged return temperature stabilizer or metering means 22 is fixed within the.