franco b wrote:
EarthWindandFire wrote: There needs to be a trade association to agree on standards of how ratings are established to avoid these misconceptions that really are spurious figures because they do not reflect real world experience. It's hard to blame an individual maker because they are forced into it by trade practice in order to compete. Oil and gas boilers and furnaces have had reliable standards for many years and in European countries they are often set in government labs.
Apologies for coming in here late to the difficult discussions. I'm not a PHD in heat transfer though with the consideration that I can pretty much hold my own with them at a major aerospace company in CT , it's important to consider the limited heat transfer area of smaller stoves. My understanding is that the Lil Heater has the same stoker assy as the Poke and others. That implies that the pure heat output of the stoker assy (independent of the stove enclosure) is the same for given CoalTrol settings.
It is reasonable to say that though the Lil Heater wall temps are hotter because the top and side metals are closer to the stoker (Poke wall temps @ top never get above 400 F ir indicated), the air washing off that metal especially at high cfm cannot convect as efficiently as larger wash areas of larger stoves since the air does not stay in contact with the metal for as long of a time. This implies that this type smaller wash area stove be best used at lower feeds and medium convection speeds.
Me? I would try to put the stove in a constant heat mode (that is available on the 'Trol) , say by putting it in a 20-22 feed rate and the convection blower at say, 40 to 50 or maybe less. With these settings and a ir thermometer to check wall and stack metal temps, you can optimize one of the variables (I would suggest the convection blower) only while drinking several cheap though frosty beers.
Earth, PM me if you want to discuss how to do this (not drink beer, the stove constant feed rate on the Coatrol ).