• Specifications
• Installation
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The ideal roof location for your solar attic fan:

• will not be shaded during the hottest part of the day
• will face the sun squarely during the hottest part of the day
• will not short circuit the air flow in the attic
• will provide the longest travel for incoming air
• will be evenly spaced between intake vents
• will be close to the roof ridge

These diagrams are illustrative only. Natural Light solar attic fans arrive fully assembled. Though the solar panel is fully adustable and removable, no other components in the fan will require adjustment during installation.


From the top of the diagram, the pitched roof units feature:

• Custom solar panel - fully adjustable and removable
• Self-tapping screws to mount brackets to solar panel
• Adjustable solar panel bracket
• Wire lead
• 1100 series, .080" thickness, aircraft-grade aluminum shroud
• Custom DC motor
• Motor isolation bracket
• Air drive precision pitch five-wing blade
• 4" x 48" stainless steel wire mesh
• Rugged 14-gauge shroud support bracket
• 1100 series, .080" thickness aircraft-grade aluminum flashing
• #6 x 1-1/2" stainless steel Phillips head screws (6)
  

An optional thermal snap switch is available to automatically turn off the unit during colder months.

Units are available with 10-watt or 20-watt power units.

Important: Read all instructions first. Take proper safety precautions when using tools and walking on roofs. Do not cut structural members in the house. Measure twice and cut once.

To install a Natural Light roof-mounted solar attic fan, you will require the following tools:

• reciprocating saw
• marking pen
• string
• caulking gun
• screw gun
• ladder
• measuring tape
• razor knife

Installation instructions are included with every fan. Use the instructions that are packed with your fan.

Southern exposure is recommended for most efficient operation of the unit. You should also consider potential problems such as objects shading the proposed roof area during different times of the day. If southern exposure is unavailable, the fan may be placed on any other exposure, and the solar panel can be adjusted to capture maximum sunlight.

Choose location for solar vent unit.

Step 2:

Hammer a nail at the center of the location chosen between rafters for the solar attic fan unit. Attach a string to the nail.  Measure 8.5" of string and attach a marking pen to the string (see diagram). Scribe a 19" circle onto the roof shingles.

Step 3:

With a reciprocating saw, cut the diameter of the hole. DO NOT CUT THROUGH ANY FRAMING MEMBERS.

Step 4:

If roof framing is 16" on center, do not cut through roof rafters. Only remove roof sheathing (see diagram).

Step 5:

With a razor knife, cut a four inch slit through the shingles and tar paper are the three and nine o'clock position of the flashing.  This allows for the foot print of the flashing to be inserted under the shingles.

Step 6: 

Insert the reciprocating saw blade sideways at the three o' clock position and commence cutting the roofing nails up and around to the nine o'clock position.  This process removes the nails that will prevent the flashing foot print from sliding up underneath the shingles.

Step 7:

Caulk the underside of the flashing with the provided caulking material.  Two concentric rings of caulking material is sufficient. Note: Installation on tile roofs will require the use of a skirt.

Step 8:

Taking care not to smear the caulk on the exposed shingles, slide flashing under tar paper and shingles and force flashing up until the shingles come in contact with the raised portion of the flashing. The bottom side of the flashing will be on top of the shingles. Secure flashing with four Phillips head screws at 3:00, 6:00, 9:00, and 12:00 positions. The 3:00 and 9:00 position screws should go under the shingles. The 6:00 and 12:00 position screws should go on top of the shingles.

Step 9:

At the 6:00 and 12:00 positions, caulk over the screw head since it will be exposed to the weather. Use the remaining caulk to seal the areas where the 4" slits were made and around the area where the shingles meet with the raised area of the flashing.

Step 10:

Adjust the solar panel to the position it will collect the most sunlight throughout the day.  Using the two self-tapping screws provided, screw the adjustable brackets to the side of the solar panel frame making sure the screws do not damage the panel.