John McDoodle wrote:What is the optimal air/fuel ratio? If I know the optimal AFR I can make the proper sized air opening in the front door.
John McDoodle wrote:Peter,
thank you again, that is exactly the info i was asking for. My riser is already slightly oversized to compensate for the shape, and my exhaust will be 4" round. If square CSA flows similar CFM to round of the same diameter, then my square air intake should be (4x4) 16 divide by four = 4 square inches? that sounds almost perfect, i could make the intake one-inch-high and four-inches wide in the bottom of my front door, which would be fine with me.
John McDoodle wrote:can either of you explain whats between the core and the surrounding bricks in this batch, which Paul explains in this video, was built by Peter? im curious what is between the surrounding brick, and the firebrick at the 7:00 minute mark in the video below, from Wheaton labs auditorium. it looks like concrete board between the firebrick core and the surrounding bricks, but everyone tells me concrete is bad? but just because it looks like concrete board does not mean it is, i suppose.