Simple and effective DIY builds can be very satisfying to make, like this rocket stove project from Desertsun02 on Youtube. This DIY project only needs four pieces of cinder blocks, and you just have to assemble them right. This will be the easiest DIY project you’ll do, I’m sure of it. It’s also inexpensive to make and rain-resistant. Watch the video tutorial below to learn the step-by-step instructions.
First, lay down one cinder block, then stack the H block on top. Next, put another cinder block beside the two blocks vertically, and lastly, stack the last block on top of the H block, with its holes facing outward.
After assembling the rocket stove, start putting some twigs in the upper hole of the vertical block on the side, then place a stove grate on the first hole of the block on top. Burn the twigs to start cooking. Your rocket stove using cinder blocks is now ready to use.
Original source: https://diyjoy.com/diy-rocket-stove-using-cinder-blocks/