A natural-circulation hot water heating system uses a compression tank to absorb pressure changes.

A ___ is a device used to create resistance in order to regulate the flow of air and the gases of combustion in a boiler.

A ___ is a device used to create resistance in order to regulate the flow of air and the gases of combustion in a boiler.

The feedwater pressure gauge on a small low pressure steam boiler turns the feedwater pump ON or OFF as required to maintain the NOWL.

The feedwater regulator has a sensing element located at the ___.

The feedwater pressure gauge on a small low pressure steam boiler turns the feedwater pump ON or OFF as required to maintain the NOWL.

The feedwater regulator has a sensing element located at the ___.

Condensate in steam lines can result in ___.

The determining factor whether a boiler is in condensing mode or not is the return water temperature.

The determining factor whether a boiler is in condensing mode or not is the return water temperature.