An installer is asked to connect a single speed geothermal water-to-water heat pump to a highly-zoned low temperature hydronic distribution system.

With a considerable volume of contradictory information in circulation regarding the application of different technologies for HVAC systems, this article seeks to explain some of the technical aspects of variable refrigerant flow (VRF) systems, and offer comparisons on the basis of cost and performance to more standard hydronic systems. 

Popular high-efficiency boilers tend to be more expensive at installation, but lower utility bills pay customers back over time. 

While forklifts were cruising the aisles of a warehouse in Grantsville, Maryland, a crew from BYCO Enterprises had to carefully retrofit that same space with 1,340 feet of gas line. 

Figure 1 shows the piping layout for an actual installation. It uses two boilers, fired in stages, to supply three areas of a building. 

The Plastics Pipe Institute (PPI) published a new technical report related to the break resistance of PEX pipe and tubing when fluid inside becomes frozen.

When HVAC work needs to be completed for agriculture applications in Ontario, Canada, Gleeson Plumbing & Heating has a reputation of delivering impressive results time and time again. 

An installer recently read about the benefits of piping a buffer tank in a “2-pipe” configuration.  

An electrician walked into the equipment room to diagnose and repair an electrical problem in the school. 

A heating designer is asked to create a three zone radiant floor heating system using a 5-ton (60,000 Btu/h) geothermal heat pump as the primary heat source, and a mod/con boiler as the auxiliary heat source.