Then I started, inexplicably, collecting soda-water cans. I found myself locating and measuring a scrap piece of ply-wood to serve as a backing. I did a math problem with my kids figuring out how many rows and columns it would take to cover the board with 12 oz. soda cans. I found some old windows which matched the size of my board. Then I started thinking... we can build one of those there thangs!
The basic idea is that you make a thin box containing stacks of cans that are punched or drilled to let air flow through them. The face of the box is a sheet of glass or Plexiglas. I have some old double pain windows which I will re-purpose for the face.
As my journal entry notes, I have a few things to figure out. I want to have a mechanical thermostat to control the vent, so when the air temperature exiting the heater drops below a set level, the vent will close and prevent cool are from cycling into the house or the draft from reversing. Maybe just a foot valve will do if it's light enough to open when warm are is flowing out the top outlet and strong enough to resist a draft pulling back the other way.
I also want to incorporate an air filter on the inlet to keep dust out. I have to also come up with a good mount, window adapter and manifold to handle routing air. Ideally, I'll draw cold air from the basement and vent warmed air into the house, but we'll see how many holes the missus will let me put in our cottage.
|Notes from my Project Journal|
|4 x 5 x 5 = 100 cans|
|Gettin' jiggy wid it. Sorry.|
|Measure, cut, repeat.|
|rollin' rollin' rollin'|
When done, the tape mostly lines up with the other end but because it's so much wider than the joint and the length is specific to the diameter of the cans, it's no worry and looks nice and tidy.
When all of the stacks are assembled, I'll give them a coat of stove-black paint, which as you might guess is hi-temperature paint that should hold up. I will likely give them a once over with some hi-grit sand paper to etch the aluminum enough to hold the paint.
When I get further along with the build, I'll post some more pictures. My projects tend to wind out over weeks and months in my free-time (which is scarce and sacred) so be patient.