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The 2019 edition of ASHRAE Standard 90.1 incorporates a change that significantly impacts the design of high-capacity space heating gas boilers. The standard mandates that gas boilers ranging from 1 to 10 million Btu/h) must be…
Read MoreEngineers seeking to meet the waterside economizing requirement of ASHRAE 90.1 - 2013 do not necessarily have to specify multi-zone commercial water source heap pumps with integral economizers. In fact, doing so may undermine efficiency.
Read MoreWaterside economizing relies on cold water from the cooling tower (aka condenser water) to absorb some or all of the heat from inside the building. In typical waterside economizing applications, plate & frame heat exchangers are used to…
Read MoreLast week we learned that ASHRAE defines a balanced system as one that delivers a flow sufficient to achieve a 97% heat transfer at each coil. This week will look at why we balance and outline the strategies that are ...
Read MoreThe task of proportional balancing is the first step to achieving an energy efficient pumping system. It involves adjusting the system balancing valves to make certain that all zones get proportionate flow under design conditions. Once this task is complete, it gives us the opportunity to trim the fat out of the system for greater efficiency...
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