Introduction: what is a condensing gas boiler, when all the water has been heated to the boiling point corresponding to the pressure to which it is subjected, what is a condensing gas boiler, each added unit of heat converts a portion, what is a condensing gas boiler, about 7 grains in weight, into vapor, greatly increasing its volume; what is a condensing gas boiler, and the mingled steam and water rises more rapidly still, what is a condensing gas boiler, producing ebullition such as we have noticed in the kettle.
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