How to Cool Light & Filter Air With One Fan

Lights don't only provide illumination to a room. They also produce heat. While this heat may be welcome on a cold winter night, it is detrimental during the summer or in climate-controlled environments like greenhouses. High-intensity discharge lighting like the kind frequently found in greenhouses gives off significant heat and it is important to discharge the added warmth safely. If you have limited resources, you can cool a light and filter the air with the same fan if you have the right materials.

Heat shields
Tape measure
10-inch fiberglass insulated ducting
Duct support rings
Drill
Screws
10-inch fan
Tape or mastic

Instructions

- 1
  Add a heat shield cover to each of the light reflectors. Make sure the cover is the right size for your light by measuring it with a tape measure before trying to install it. Follow the installation instructions for the specific cover because different models attach in different ways. The covers help prevent the heat from diffusing so a fan is more effective at ventilating it.
- 2
  Run 10-inch fiberglass insulated ducting from the heat shield covers over to where the fan will go. Make this as straight a line as possible so the fan operates at peak efficiency. The opposite side of the ducting from the fan should lead out of the room or building so the heat has somewhere to go. Hang duct support rings by drilling them into the ceiling joists at no greater than every 5 feet and run the ducting through it so it doesn't sag. Rest the ducting on available supports that are already in place as an alternative to the duct support rings.
- 3
  Connect a 10-inch fan to the ducting on the opposite end of the outtake by attaching the ducting to the outside of the fan with tape or mastic. Turn the fan on high. The fan should be on the same level as the lights for best results so the air has a straight line through the lighting to the outtake.

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