Articles by John Siegenthaler, P.E.

A customer, who originally agreed to install a zoned radiant floor heating system supplied by a modulating/condensing boiler, changes his mind after the system has been designed.

Are we ready for what’s coming?

A multiple boiler system has been configured to supply two loads as shown below.

Using a gas-fired cast-iron boiler to supply zoned radiant floor heating.

Tracking energy flows in a ground-source heat pump.

Which hydronic heat emitters work bestwith solar thermal systems?

A multiple boiler system is being planned to supply several independently controlled heat zones.

Using pressurized thermal storage tanks to buffer wood-fired boilers.

A designer needs to connect an indirect water heater to a multiple-boiler system.

Today's models combine aesthetics with performance.