I've always liked the Cozy Heat web site because prices of equip. were easily available, be sure to check their ad from the Boiler Room once in a while to help pay the bills. I was just looking at a pdf file of EKO-line and saw a laddomat 21 thermoregulator but couldn't find a price. That looks to be quite a piece of engineering wonder how bulletproof it is? Has anyone had a gassifier running for over 5 years? What are the costs and life expectancies of the refractory materials? The Blue Forge looks like it might use standard fire bricks stacked together and is simple compared to the rest. This forum sure has a wealth of knowledge and real life experience to be shared. Gassifiers sure look sweet but wood is pretty cheap and it's nice to know I can replace any part on my system with an "always in stock" item at the local supply house KISS is hard to beat. We had a hard snow (for us) abt 12" and while I was out shoveling snow I was a little surprised to see snow on my chimney cap several hours (Temp was abt 30 deg. F) after the snow quit and the boiler had called for heat at least once maybe twice and the cap is less than two feet from the boiler. I'd like to see some of the resident gurus start a thread on heat storage water versus solid (stone sand etc.) water storage seems to have lots of issues corrosion, expansion, treatments, anti freeze, etc. I know the defenition of a BTU involves 1 Lb. of water but does it also apply to 1 Lb. of concrete or granite or is there a specific heat for different materials? I know water is king when it comes to heat transfer but what about after all the other variables.