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SPSF Product Notes


Solar Panel Mounts - Locate the panel at the roof edge or on any other solid structure that sees sunlight without shadows, most of the day, all year.  Infinitely adjustable ball and socket. Made for hurricane strength winds. Solar panels can be easily adjusted, or removed (4 nuts) before severe named storms. NO NEED TO MOUNT IT ON THE ROOF ITSELF! NO HOLES IN THE ROOF! NO GOING ON THE ROOF TO INSTALL THE PANEL!  NO CHANCE OF ROOF LEAKS OR ROOF DAMAGE! 

Solar Panel Visibly
Can be mounted anywhere there is sunlight, up to 100 feet from the fans, OUT OF SIGHT!                         

Fans - Safe, quiet, state of the art 12VDC, high efficiency, UL Listed, brushless motors, polarity protected, with locked rotor protection.                        

Fan Visibly - Located inside roof eaves or crawl space vent. No protruding boxes or domes. OUT OF SIGHT!

Safety -
Low power, no fire or shock hazard. All electrical components and plastics are UL Listed. Plastics are low smoke, fire retardant, self-extinguishing. Meets applicable national, state, and hurricane zone safety codes.

Installation Safety
- No attic or roof access required for solar panel or attic fan installation. Everything installs at the side of the building with a drill, a screw driver, and a wrench.

Tools Required -
Solar panels mount with a drill and an adjustable wrench. Soffit fans mount inside the soffit vent with built-in metal springs, no tools are required other than for opening the vent. Crawl space fans mount with a drill and a screw driver. All electrical connections are plug and play.

Longer wires  and connectors can be provided on request, at a slight additional fee.

SPSF Solar Attic Soffit Vent Fans

SPSF fans are supply fans intended to be located where they are protected from blowing precipitation, such as inside the soffit vents, inside the attic eaves.

SPSF soffit fan output should be directed from the soffit vent, horizontally across the attic, blowing just above the attic ceiling insulation. If insulation baffles are installed, make sure they allow at least the same opening area into the main attic as the fan opening. If blown insulation is installed in the attic without baffles, lay a piece of cardboard or foam under the fan discharge and over the insulation edge to prevent the fan from disturbing the insulation.

SPSF soffit fans require at least 20 square inches of open, net free vent area for each mini fan intake. A Model 630 cluster of 2 fans requires 40 square inches of free intake vent area at the fan cluster, and a Model 630 cluster of 3 requires 60 square inches at the fan cluster. Perforated soffit, and some continuous slit soffit vents, may not provide enough free vent area at the fan.  Please check with us.

Fiberglass wool insulation is provided with each kit to surround and support the fan, and to close off the soffit sides between truss and joist, to prevent attic air re-circulation into the fan intake.

Attic fans are not a substitute for good, adequate ceiling insulation, ceiling sealing, and AC duct sealing.

SPSF ventilation area recommendations are based on our tests and experience with typical attics without partitions. They are not based on conventional attic fan CFM recommendations. Results vary somewhat for each application.

Always use the solar panel swivel mount to point the solar panel to the southwest! This will help prevent the fans from coming on in the early morning when the attic air is cooler, and will prolong the fan run time at the end of the day to help clear out hot attic air and heat.

CSF Solar Crawl Space Vent Fans

CSF 210 is an exhaust fan.  Using it as a supply fan risks pushing harmful moisture, gases, and organisms into the area above the crawl space. It should not be used as a supply fan.

CSF fans fit standard 16" x 8" foundation vents. If the foundation vents have thermostatic dampers, the CSF fan should be installed inside, on the crawl space side of the vent.  Otherwise, it can be installed from either the inside or outside, or in an opening cut in the crawl space access panel.
Any bare earth on the crawl space floor should be covered with a vapor barrier, such as common 4 mil plastic sheet, loosely overlapped at the edges and seams, to block ground water evaporation. 

Insulating pipes or AC ducts that might drip condensate, sealing air conditioning vent ducts, and stopping any foundation or piping leaks, is highly recommended.

CSF exhaust fans require equal free vent area elsewhere in the crawl space, to allow drier outside air to be pulled in.  If the crawl space has multiple vents, central location of the CSF exhaust fan is recommended for even airflow. Do not use CSF exhaust fans without equal or greater free vent area for outside air entry.

CSF ventilation area recommendations are based on our tests and experience with typical vented, enclosed crawl spaces with sand, soil, or gravel floors.
Results vary somewhat for each application.  They are not a substitute for proper drainage or leakage prevention.

If existing freeze protection may be inadequate, either install a suitable thermostatic switch (not provided) in the wire from the solar panel, or unplug the fan during at-risk freezing conditions.

From time-to-time, cool ground under the vapor barrier and moist outside air entering the crawl space may cause some very small puddling of water on your plastic vapor barrier.  Experience has shown that CSF will dry these puddles through the exchange of fresh air, resulting in an improvement in the crawl space atmosphere.

Always use the swivel mount to point the solar panel to the southwest! This will help prevent the fans from coming on and pulling in early morning ground moisture and dew before it has evaporated!

Questions? Want to Order?
email -
 or text/call 1-305-807-4705

We accept payment with major credit cards, checks, money orders.
We do not charge customers a fee for credit card use.

Solar Powered Soffit Fans LLC
701 Amherst Avenue Davie, FL 33325 US
Phone: 305 807 4705 Website:

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