Articles by John Siegenthaler, P.E.

Details matter when adding a pellet boiler to an existing system.

Orchestrating the wet-side hardware.

A multiple boiler system using sectional cast-iron boilers has been configured to supply two loads.

Providing space heating, space cooling and domestic water heating.

Combining low supply water temps with low-mass panel radiators.

An installer is asked to provide a relatively simple single-zone, slab-type floor heating system supplied by a geothermal water-to-water heat pump. He’s heard that a hydraulic separator is a good component in such systems.

How to combine an air-to-water heat pump with a boiler.