In past columns, we’ve discussed geothermal water-to-water heat pumps and air-to-water heat pumps via hydronic heat sources. Both can be a great match to low-temperature hydronic distribution systems.

PM Hydronics Editor John Siegenthaler and longtime columnist Dan Holohan will present educational sessions Jan. 22, 2014, at PM LIVE! during the AHR Expo in New York City.

The course is part of a new continuing education initiative directed toward the goal of an ANSI-recognized certification program for radiant heating and cooling system designers and installers.

“Mastering Hydronic System Design,” an online course taught by BNP Media Plumbing Group Hydronics Editor John Siegenthaler, is now underway to a sellout class of 50 students. The course runs over a period of 10 weeks and includes about 20 hours of video instruction. The course is scheduled to run again for another 10 weeks starting Feb. 14, 2014.

Caleffi TwistFlow distribution manifolds use integrated balancing valves enabling precise 0.25 gpm to 2 gpm adjustment to each circuit.

WaterFurnace introduces the 5 Series 502W12 high-temperature hydronic heat pump. Capable of 150° F water output

Differences exist between rules of thumb and precise calculations.

 The following formula has been around the North American hydronics industry for a long time:  

The 6+1promotion runs from August 15 to October 30, 2013.

Students can earn AIA credit.