You need 2 55 gallon drums. cut the bottom out of one, and 25% of the side
see my picture of mine. it will also need an exhaust hole cut into the top
on the other drum, you need to cut a hole for a cast iron brake drum to fit into the top
a hole for the blower pipe
and on as a cleanout. to access the 2'' cap
for your blower. try and find a gas furnace exhaust blower like the one in the picture
if not. you can use a hair dryer. but you will go through a bunch of them
use the flex dryer vent hose to hook up the blower the the pipe
see my picture of mine. it will also need an exhaust hole cut into the top
on the other drum, you need to cut a hole for a cast iron brake drum to fit into the top
a hole for the blower pipe
and on as a cleanout. to access the 2'' cap
for your blower. try and find a gas furnace exhaust blower like the one in the picture
if not. you can use a hair dryer. but you will go through a bunch of them
use the flex dryer vent hose to hook up the blower the the pipe