I've been going back and forth between the two. This was more of a hypothetical question. On one hand, an RHP is a reliable but expensive heat source, but on the other hand a CHE needs to be replaced more often but is cheaper and easier to deal with. I've gotten a quote from ProHeat on a panel and I know how much a CHE would cost. I'm just weighing the pros and cons of each and making sure that each option is viable for me.