I love all the advances taking place in the world of hydronics, but I’m still seeing plenty of steam systems out there in our older cities, so knowing about dry steam will help you if you’re replacing a steam boiler. The dryer the steam is, the better you’re going to look to your customers.
The Hydronics Institute was once obsessed with dry steam. They tested all steam boilers for steam quality. That means that a boiler couldn’t get the I=B=R seal of approval unless it produced 98% quality steam. The I=B=R rating, in other words, was your assurance that the steam boiler you bought would produce good, dry steam.