Articles by John Siegenthaler, P.E.

An installer was asked by a client to use both a ground source heat pump and a boiler as alternative heat sources in a zoned, low-temperature hydronic distribution system.

The choice of piping system can make a significant difference in operating cost.

An installer decides to replace a 30-year-old cast-iron boiler with a modern mod/con unit.

Reducing noise from heat transfer plates within radiant panels.

Reducing noise from heat transfer plates within radiant panels.

An installer uses a 4-way motorized mixing valve to interface between a conventional gas-fired cast-iron boiler and a low temperature radiant panel system.

A project requires both medium and low temperature radiant floor panels. The installer proposes the following system design. 

The concept for a simple, stable and efficient residential heat source.

As the price of fuel oil skyrockets, there is increasing interest in geothermal heat pumps as a heat source for hydronic radiant floor heating.

John Siegenthaler says, if there's ever been a time to get serious about slab insulation, it's now!