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I would suggest finding out if you have enough head on the suction side of the pumps. Run a pressure loss calculation to figure out the pump's NPSHR compared to your available NPSHA. Remember that you are typically dealing with absolute (vs. gage) pressures here. Yes, a dirty strainer will...

Like most other HVAC system, chilled beams will perform in a satisfactory manner if designed, installed an operated properly. Most (if not all) building codes require that we provide ventilation air into an occupied space. The ventilation air serves multiple purposes including helping keep the...

EFLH is (was) used to very quickly calculate the annual energy consumption of an A/C device. Annual Energy Consumption (kWHr)= full load kW/Ton x Load (Tons) x EFLH The proliferation of PC and software that can easily and quickly calculate a more accurate energy consumption have reduced...

MANY THANKS FOR ALL THOSE WHO HAVE REPLIED TO MY QUESTION. I believe I also owe an answer to the question as to why this Owner wants only top quality pump manufacturers. Without diving into too many details, this is for an academic project that aims to attract the best researchers in the world...

An owner is requesting that we specify the highest quality HVAC pumps for his project. Can you let me know which manufacturers in your experience are considered "industrial" or top grade rather than "commercial" grade for centrifugal end suction, double suction and vertical turbine pumps? Thanks