I'm interested in this discussion and the ARP unit. I've seen their website and videos. I wish they had presented a better case for why I need one. I understand the principle, but there is very little objective evidence in their case.
In their video, the temperature rises only around 3 degrees before the unit kicks in... and that's over an 11 1/2 minute period... and a tilt of around 20 degrees (my estimate - the video doesn't specify). I wish they had convinced me by showing what happens to the temperature under the same conditions without their unit.
How high does the temperature have to get for damage to occur? How much tilt? Over what period of time? How critical is it? How much does the ARP unit affect life expectancy? What is the normal temperature swing of an unmodified boiler? How much does ambient temperature affect the temp of a boiler?
Interested but skeptical until I can see a better case.