Hover over main image for caption information. A typical oil fired forced hot water heating system, installed in 1980 was ready for replacement. The original boiler room equipment was removed, which ...

A heat pump functions as a typical air conditioning system in the cooling mode — absorbing heat from indoors and rejecting it outdoors. In heating mode, the coils reverse their functions. The outdoor ...

Recently I wrote in this column that every component in a controls circuit is a power supply, a switch or a load — no other possibilities. And that means that every control, hydronic or otherwise, is ...

In a December 2014 Plumbing & Mechanical Hydronics Workshop column, we discussed the benefits of dual-fuel systems that combine a geothermal water-to-water heat pump with a mod/con boiler. The boiler ...