Mark Meier

Thanks guys, I will first work on shortening the horizontal length and less bends to see if that makes any difference. Then look at the burn tunnel. Thanks, will let you know what happens.

Thanks Byron, the RMH is in the basement and is vented out the side of the house just below the floor on the second level.

1.85 " riser to top of barrel 8" riser.

Feed opening is 6" x 7", J-tube is 6" wide 4.5" high and 27" long.

Thanks!

Hello, I was excited to build my new Rocket Mass Heater and before I cobbed it all in I decided to give it a test. We could not get it to draft so we stuck a hair drier in the clean-out and warmed up the pipe and even started another fire with the hair drier still in the cleanout (Cover on). Then it would draft and start to heat nicely. When we took the hair drier out we thought it would continue to draft but it didn't, no matter how long we did this it still did not want to draft. Smoke just came rolling out. The stove is in an L shape,6 inch pipe, 11 feet on one end and 8 feet on the other. Distance between heat riser and top of barrel is 1 1/2 inches. Heat riser is 8 inches wide. We have it piped out the side of the house 9 feet up. Any Ideas what I can do? Thanks!

Attached are 3 pictures.