https://youtu.be/ceRrs7k_n3Y
Geek Notes
Low loss headers get specified by default far too often, usually because someone's heat loss calculation was wrong and the system got oversized to compensate. Heat Geek argues that fixing the heat loss assumption removes the need for the header in many of these cases. Get your heat loss numbers right first, before you reach for a low loss header to paper over them.
Another look at where not to use low loss headers (no we won’t let it go) and also that looks can be deceiving when it comes to heat loss. Keep it simple stupid. More on valve authority and opening characteristic here
