Ideal for CEA Hydroponics
When constructing multiple grow rooms for hydroponics cultivation in CEA installations using a LUNG ROOM, creating an air handler split is almost inevitable. This example of a DIY Air Handler Split is inexpensive and fairly easy solution. While more elaborate systems can be fabricated with materials such as galvanized sheet metal, we found this system to be very effective and working trouble free for several years of continuous operation.
The Basic Materials:
scrap lengths of clean, 1/2″ thickness plywood or O.S.B., natural silicone sealant, “L” Brackets, 1/2″ long wood screws (Robertson head preferred), saw, drill with screw driver, “Y” fitting AKA “Pants” for split, appropriate length and diameter flex ducting.
…and of course, the air handling system for your CEA hydroponics garden
Automatic dampers can be installed in the rigid duct work or even fabricated right inside the handler. These act as “gates” that can open and shut, sometimes in varying degrees or “steps” based on inputs and signals from things like environmental controllers of hydroponics cooling applications or timers based on growing lighting automation as related to the garden photoperiod.
As you add more rooms, so long as cooling power allows, you can keep up your air flow coming from the main air handler by installing inline centrifugal fans in line with each of the new ducting runs you add with expanding the number of grow rooms connected to the lung. Note you can increase air flow without increasing the duct diamter by simply adding additional inline style fans down the length-usually at least one every 25 feet apart or closer-depending on the individual installation, naturally.
Air Conditioning power is typically rated in BTUs on Tons. For every 1KW in HID lighting (like high pressure sodium) count for about 4000 BTUs per lamps, assuming no air cooled lights and some heat from CO2 generation appliances.
DIY Air Handler Split Pictorial How-To: