you have made some very real points... the HVAC market has been dominated by multi-million dollar Juggernauts, who had developed technology 40 years ago, and are still plugging the exact same product.
We use the Maxitrol Technology, in our high efficiency heat exchanger design. The competitors are still using an inferior turn down burner head... With modulation heat/cool control being the technology of present day and the future, it concerns me that Engineers of "old school" mindset are terribly outdated with their knowledge of modulation and increased efficiencies... It seems that "cut & paste" engineering has become the standard practice.
Thanks for your input, and your industry knowledge... we can only hope that the big dinosaurs of HVAC ignore the new game rules... It’s going to get a lot more tech-y in coming years.