“Efficiency” is a slippery word in heat exchanger discussions, because it gets used for at least three differentthings: how close the coil comes to the theoretical maximum heat transfer, how much fan or pump energy itcosts to move fluid through it, and how well it holds its performance over years

Most guidance on choosing a manufacturer is written by manufacturers, and it shows. The criteria alwaysturn out to be the ones the author happens to satisfy. This one is written to be useful even if you buy from someone else. The questions below are the ones thatactually separate a capable