The message is possibly controversial, yet quite simple: Selection is all about fan total pressure. The article is a bit more complex, with discussion of what the author sees as confused logic, accompanied by multiple illustrations to back up his premise. Take a look for yourself - when it comes to proper selection methodology, the pressure is on.
Many engineers tend to avoid or delegate the nitty gritty of a ground source heat pump system, from soil moisture effects to building system (im) balance. It's time for designers to get in the loop. Learn more about Grounded In Reality in the December issue. Other topics in the December issue include health care HVAC, Boilders, check out the Back2Basics, and more.