plmberpete McCoy

Hey ghost, 1.5-2" for a 6" stove or 2-3 for an eight. totally important not to bottle neck the system past the burn chamber

My intention is to have a slight grade down and out. I was thinking that the cap on the end with a gated Tee would allow the mass longer to dissipate heat with out cooling it from the inside as when open to atmosphere

The way I am thinking my longest run would be 40ft max. I am proposing using one stove for two flues going different directions and ending in different areas. I would need to be able to cap or plug the flue not in use to direct it to the other flue. I am now thinking I would need a way to also close one flue near to the stove but as yet not sure how or decided.

I am interested in building a rocket stove to heat a green house. I am proposing to use the rocket as a single heat source to feed two discharge through mass. Imagine a large block shaped letter S. top & bottom run would be 21 feet long, the connector's would be 8 Ft & the center frun would be 18 feet with the stove connecting to the center entering a tee so discharge could be routed either way by capping the end not desiring to use. The total run of mass would be 75ft but only 37 1/2 per side. The bench to absorb heat will be 18x18 with raised beds 8" deep x 24" wide on both sides. I am looking for reasons this design will not work

I happened on this site while looking for HASU plans that seem to have disappeared. The principle of thermal mass storage is similar except 16 tons of sand and a piping network made a heat exchange. I really like this simplified version.