Bradford White offers two new products featuring a Vitraglas® coated, double-wall heat exchanger coil.

Overview: An installer has decided to use a mod/con boiler with a high head loss characteristic and connects it to the rest of the system as a secondary circuit with its own circulator. The two load circuits require the same water temperature, so he connects them as shown.

The Ancient Romans practically invented central heating with their version of underfloor radiant heating called a “hypocaust.”

Mark your calendars for Sept. 13-16, 2007, to attend the second annual Oil Heat Retreat hosted by the NAOHSM at the beautiful Red Jacket Mountain View Resort located in the heart of the Mount Washington Valley of New Hampshire.

Volunteers of America is still seeking volunteers with professional craftsmen skills to help in the rebuilding of the Gulf States, which are still in critical need of assistance after Hurricane Katrina.

ICC has also announced it will move its world headquarters into a Leadership in Energy and Environmental Design (LEED) certified building in the nation's Capitol.

The International Code Council partnered with FEMA and the National Institute of Building Sciences to develop an easy-to-understand guide to help homebuilders, code officials, contractors and other non-engineers understand earthquake design requirements for homes.

The Bureau of Labor Statistics reported Dec. 19 that construction costs had plunged in November.

The following system has been planned with three 200,000 Btu/hr. boilers with plenty of capacity supplying a primary loop that serves several secondary loops.

As this issue of PM Engineer went to press, controversial California legislation designed to drastically eliminate the lead content of faucets sold in that state was awaiting a final decision by Governor Arnold Schwarzenegger.