Articles by John Siegenthaler, P.E.

Air-to-water heat pumps offer new opportunities for hydronic pros.

Eager to keep up with this new technology, an installer decides to install a hydraulic separator between a boiler and distribution system.

Updating an old approach using modern hardware.

The system shown was installed to provide domestic hot water to a high-end home with six bathrooms. The installer selected the largest 119-gallon indirect water heater available from his local supplier.

Sometimes the Btu just canít squeeze through.

A contractor connects an on/off water-to-water heat pump to a highly zoned radiant floor heating system.

Too little flow causes too many complaints.

Over the last few years, hydraulic separators have been gaining popularity in the North American hydronics market. Eager to keep up with this new technology, an installer decides to install a hydraulic separator between a boiler and distribution system. 

What’s often impossible with forced air becomes straightforward with hydronics.

This hydronic system was created to connect two gas-fired, cast-iron boilers to a low-temperature distribution system that supplies 10,000 ft. of 5/8-in. PEX tubing embedded in the floor slab.