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[slimjim]

I agree with The Boiler, either way, your choice, but BURN WOOD!

[mag1266]

I have a Heatmor and I love it. But if I was looking for a new unit I think I would go with the P and M Ultimizer. In fact my nephew is building a house and asked me what brand to go with and I found myself convincing him to go with P and M. ( maybe I should become a dealer)

[slimjim]

 Perhaps you should, it does take some commitment though, Thank you for convincing him to look at our product line either way, did you get him to come onto this forum?

[mag1266]

Slimjim - Yes I told him about the form and he has joined.

[Sprinter]

I would like to see more attention on the stoves thermal efficiency. How much heat is transferred to the water, what are the units stack temps, idle, start of cycle, at full burn....etc. I don't think enough attention is brought up of OWB's thermal design. We hear lots of burn eff, firebox shape and size, material type.

[Jwood]

  sprinter!

[diesel-dodge]

I agree also. It would be really awesome to have a way for companies to measure how much heat a boiler will actually extract from the fire at full burn. I know that gasification stoves are the best at this but im sure some are better then others.

[slimjim]

You guys are right, I sure would like to see a real test that shows real results, the problem is everybody would have to participate in a program that can always be bought, who could we trust to independently test without suspecting somebody of being on the take, in my opinion the best test is the real market and feedback from owners in the field on open forums such as this, how could it possibly be more honest?

[Jwood]

You are right slim, but if someone smart enough wanted to try it could you put something like a pyrometer over the fire and then one in the stack and some how get some numbers and percentages of efficiency based on the difference? I'm sure it would be more complicated than that because that seems to easy, not to easy to do just way to easy to come up with, I pulled that out of my butt, just being honest haha

[TheBoiler]

There is EN 303-5

[Jwood]

Say what??

[slimjim]

Jwood, I really like you and agree 100% with both of your last posts, lets figure out right here how to do it, The boiler,  You will have to explain your last post a bit better for those of us that are a bit simple like myself, I'm sorry My buddy Danny is mumbling in the backround, he says that he's not mumbling, I think he's wrong!

[Jwood]

Haha has he been drinking, and ok let me think for a min.....

[Jwood]

Ok so you have two pyrometer 1 at the hottest point in the fire box and 1 in your stack probably as it exits the stove where there is no more usable heat. So you would divide the stack temp by the fire box temp and  multiply it by 100 to get a percent. I don't know any of the numbers so I'm gonna make some up, let's say stack temp is 300 and fire box is 1200. 300/1200=.25 multiply that by 100 gives you 25% so 25% of the initial heat from the fire box is unused. So 75% heat transfer on those numbers. Does that sound legit?

[Jwood]

Slim I looked it up en 303-5 is a European boiler standard must be like our EPA standards but I'm not sure, hmmm European no wonder I had no clue what that meant.