Julie Reed wrote:Okay... I’m confused. About a month ago, in the ‘stove driving underfloor heating’ thread of the Rocket mass heaters forum, Paul commented, “In that case, would you agree with me that most people tinkering with wood fire heating water in a pressurized system have a pretty good recipe to hurt themselves?“. And in another comment, “I think pressure relief valves can fail.”. And other ‘boom squish’ discussion.
And yet, here that exact thing is being built at the labs! What gives? (I’m not asking to be controversial, I’m genuinely curious, as I’m in the T&P valve camp and think what is shown here is just fine).
Julie Reed wrote:Not to doubt your experts or sound overly critical, but neither T&P valve is installed correctly. They ‘should’ work just fine, being at the top of the system, but by design- and code- the bulb needs to be inside the actual tank to work properly and be legal (and safer). Or are they JUST pressure relief and not temp (also not as safe)? If the latter, then a T&P added to the top of the tank would make this bulletproof. Hopefully drain piping was added to them after these photos were taken? That would be a nasty burn if you were nearby when one of those popped off and rained down scalding water.
I think this is a neat prototype, and very offgrid friendly in its simplicity. Maybe just needs more insulation, a shed roof to keep snow and rain off, and a willingness to fire it every day in winter so the pipes never freeze, or redesign the plumbing to be easily drained after use.