Understood Pac, that makes good sense, any unheated air will be cool, hot coal heats the air, tune the air according to the ash ring size, got it.
Good question RR, I keep my eye out when good deals come along, and have climbed a long ladder of hand feds, I kept upgrading as I saw them, used them and then upgraded again. I still have the hxl and the 88 for heating the place up when I work with epoxies. Slow dry cure is 48 hrs at 80 f , any lower than 80 f and it needs a week to cure. and a week is not going to happen. So for the past several years Doug G has been telling me that I need to get a stoker boiler, it will change your life. So it was on my watch list. Then this past July, I went on a whim for a crazy CL add, and got that VW. The other stuff is still good, but this VW is going to be my main priority, all the time priority usage. It is feeding 10.5 pounds/hour. I believe it was ordered with the lesser pds/hr range, Scottscoaled gave me that info. So I got what I believe is the perfect match for my heat load. The main house is 1500 square feet,14000 cu ft, with reasonable insulation, base board and some underfloor rad tube areas that are solar assisted.. The shop is 1800 sq ft, 25000 cu ft, with tubes in the concrete, 2nd floor is 1000 sq ft, 7600 cu ft, with some basebd rad. Just a couple windows in the entire shop that I put press fit 2" rigid foam in for the winter. 6" walls and max on cieling glass. The whole building is pretty tight. I did heat it for several years with only a jotul507, and was plenty warm, but it is a shop and I was only keeping it at 40 f to 50 f.