At this point, I don’t have as good an answer as I’d like. Up until a month ago, I was juggling a job, Water Heater Rescue, family matters and everything else and there was no time for anything. The job is gone, so I have more time now to consider how to make waterheaterrescue.com better.
One way is to do more research on who makes what and why. I did a quick and dirty search just now at Bradford White, A.O. Smith and Rheem. The first two state up front in the spec sheets of their heaters that they have one-inch or two-inch insulation. I didn’t see any tank that had three inches, but I didn’t check them all out, either. Rheem specs simply don’t say. That’s something for later research, I think.