Guide to High
by John Seigenthaler
Condensing boilers work
best in low-temperature
applications. For other uses,
consider power venting and
By capturing residual heat during the boiler's off-cycle, the System 2000, from Energy
Kinetics, achieves near the efficiency of condensing boilers without the complications.
Since the energy crisis in the early 1970s, manufacturers have devised a number
of new strategies aimed at extracting more heat from a given amount of fuel. At
the same time, they've developed new approaches to handling exhaust gases and
reducing off-cycle heat losses. This article will take a brief look at these new
approaches, and provide some practical guidance for their selection and use.