Plant where I work is reviewing the requirements for new projects. We've been having problems with HVAC equipment failure soon after the standard 1 year warranty expires. Would adding a 5 year part and labor warranty requirement to the specifications for new projects be reasonable? I understand...
A low temperature test facility I'm working on has a cold air system which delivers air into the test chamber at -50 degrees F. There are two air handlers so that one can be working while the other is being de-iced. Motorized dampers are used in the duct to isolate the air handlers, however, the...
Does anyone have any experience with the Rigid ProPress crimp pipe fittings?
http://www.propresssystem.com/
A contractor is submitting it as an alternative to soldered copper for a chilled water hydronic system. I'm leaning towards approving it, but thought I'd ask if anyone has worked with...
Just thinking about a subject that I've been wondering about for some time. At times when I'm driving past a refinery or a heating plant, I've noticed that some of the smoke stacks have a helical fluting or strakes along the exterior of the stack, usually near the top. Does anyone know the...
I was looking at the original 40 tear old HVAC system in building yesterday. The tenant was inquiring about modernizing the system for better performance. What I found was two multizone AHUs which will probably require a bit of maintenance that was neglected over the years, maybe a new control...
