Articles by John Siegenthaler, P.E.

A few design questions shouldn't keep you from the benefits of primary/secondary piping.

A little extra attention to details can mean a world of difference.

What's an ideal way to heat a 300-ft. by 500-ft. slab-on-grade industrial building with 20- to 30-ft. high ceilings, and a design load of 3 million Btu/hr.?

Underreving injection pumps needlessly waste control accuracy, warns John Siegenthaler.

Exercising the thermal mass of a boiler will improve system performance, says John Siegenthaler in his Hydronics Workshop.

Load diversity allows a heat source to be reduced with respect to peak load.

Some hydronic systems use a separate reset-controlled mixing device for each water temperature required. It works, but it's not always necessary.

You should consider the Youker system as part of your radiant floor offering.

Answers to the questions you've been asking: PM's popular columnist John Siegenthaler gets numerous inquiries from readers seeking his help with thorny problems in the field of radiant heat.