This is a project that I concocted to provide air circulation in both of my ExoTerra vivariums. I used a:
-low speed muffin fan
-corrugated sheet plastic
The “air box” houses the fan & sits behind the tank.
The “top duct” directs the air flow from the air box to the strip opening along the top of the tank.
The “frame” supports the air box on the back of the tank.
The “air box” dimensions are based on the size of the fan & space available in the back of the tank. My fan is 3.1x3.1x1.5 so the box is 4x6x3. The box included a overhanging top flap that will sit on top of the “top duct”.
The “top duct” is a upside down trough that straddles the back tank edge. The tank cover along the top of the tank’s back needs to be open for air intro. Again, the duct dimensions are dependent on the length of the strip opening & the size of the air box vent. The vent for this project is 4x1.5 & the strip opening is 24x0.5 w/1.25 lip. The duct’s final dimensions are 18x1.5x2. The top flap from the air box & flaps created by cutting the opening duct for the vent opening, are used to connect w/ electrical tape. The tape is also used to form duct end caps & of course, joining box & duct edges.
The “frame” is formed by bending a clothes hanger to support the “air box” onto the back of the tank & adjusted to position of the entire assembly. For this project, the box needed to stand off the back of the tank approx 0.5 so, had to form bottom legs at the bottom of the box.
This plenum was designed to provide efficient & total tank air circulation from the top of the tank & minimizes view & sound of source.
Sent from my iPhone using Tapatalk