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A couple of things to consider when choosing the correct solar attic fan for your home:

1)  What type of roof do you have?  composition, wood shingles, aluminum shingles, spanish tile, flat tile, metal?

2)  Does your roof face either south or southwest and have good sun exposure during the day?

     

Solar Attic Fan

Keep your attic, house and head cool with savings! 

Solar Powered Attic Fans cost nothing to run and save you bundles of energy

When hot air rises above 82F and you decide to use air conditioning, you can shut the windows and crank up the air knowing that the attic fan will save up to 30% on cooling costs by getting rid of trapped super hot air that tends to collect in attics and cause heat to back up into the home.  Without the fan, the house gets hotter and hotter all day long and the ac never stops.  When it gets to 150 degrees in your attic it begins to penetrate your living space. With the solar attic fan, the hot air is removed, allows cool air in and your A/C runs much more efficiently.  Attic air is 60 degrees cooler and less heat penetrates the rooms. 

JUST A LITTLE POWER TO SAVE MONEY BY REMOVING ALOT OF HEAT! 

Solar Attic Fans create a positive airflow through your attic that does not rely on wind or require excessive passive venting. 

Excessive passive venting can cause excessive moisture infiltration in the form of snow or rain.  The attic fan is normally mounted up on the roof of the home toward the back about two feet down from the peak.  It goes on and off automatically with a thermostat, so it only runs when it is beneficial.

The attic fan has a flashing that fits in with the shingles and is waterproof.  Attic fans use less than 300 watts, and offer these important advantages:

1.  Lowers upstairs room temperatures by 10°

2.  Lengthens roof life by keeping shingles cooler

3.  Saves up to 30% on air-conditioning costs


The exact savings obtained depends on several factors like: The color of your roof, if the home is shaded, the amount of insulation you have, and the efficiency of your cooling system. 

Ideally, a solar attic fan installation will pay for itself within 3 years The high quality Power-Save Solar Attic fan is recommended.

But the benefits don't stop there, in winter the solar attic fan continues to help the homeowner, as many of today's houses have insufficient ventilation and attic air exchange.  This causes high humidity levels from everyday activities.  This moisture migrates through the ceiling towards the roof where it comes in contact with the cold structure.  Here, ice and frost form, causing damage to your roof structure.  Additionally, moisture can saturate insulation, promote fungal decay and plywood delamination.

Power-Save Solar Attic Fan 10watt / 850CFM

Keep your attic cool!

Power-Save Solar Attic Fan 10watt / 850CFM
Click to enlarge image(s)

Saving energy in your home must start at the top. As warm air rises, it collects in the attic making your entire house hotter and your air conditioning less efficient. This costs you valuable dollars and unnecessary wear and tear on your cooling equipment. Saves Energy Save Money!

The Power-Save Solar Attic fan removes hot air from the attic keeping your home cooler while maximizing your air conditioner's efficiency. The solar powered fan draws no electricity from the utility and will cost you nothing to operate! FREE SHIPPING!!!

Removes Hot Attic Air; Solar Powered; Up to 850 CFM Air Flow; Optional Thermostat; Same Day installation; Proudly Made in USA; 10 yr.shroud/5yr.motor/25yr. Solar Warranty

SKU PS-SAF10
Qty
Price $489.00
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Power-Save Solar Attic Fan 20 Watt 1350 CFM
Power-Save Solar Attic Fan 20 Watt 1350 CFM
Click to enlarge image(s)

Easy To Install Solar Attic Fan 20 Watt 1350 CFM
10 shroud/ 5 motor/ 25 year Solar Warranty

SKU PS-SAF20
Qty
Price $589.00
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INSTALLATION STEPS

1)  In your attic, mark the location of your solar-powered vent between two roof rafters.

2)  drive a nail through the center of vent location.

3)  Install roof brackets and fall-arrest system to roof

4)  Scribe outline of vent's flashing on roof using homemade dowel compass.

5)  Cut shingles along circular outline with a utility knife, cut a 4-inch slit throught the shingles and the tarpaper at the 3 and 9 o'clock position of the flashing.This allows for the flashing to be inserted under the shingles.

6)  Pull nails and remove shingles from within the circle.  Insert the reciprocating saw blade sideways at the 3 o'clock position and commence cutting roofing nails up and around to the 9 o'clock position.  The process removes the nails that will prevent the flashing from sliding up underneath the shingles.

7)  Use compass to scribe a hole for vent onto roof sheathing.

8)  Cut hole in the roof with a reciprocating saw.

9)  Remove shingles from around the vent opening.

10) Apply continuous bead of tri-polymer roofing cement around hole.

11) Set roof vent over hole, then screw the fan's flashing to roof.  Caulk underside of flashing with the provided caulking material, Two concentric rings of caulking material are          sufficient

12)Taking care not to smear caulk on the exposed shingles, slide flashing under tar paper and shingles and force flashin up until the shingles come in contact with the raised portion of the flashing.  The bottom side of the flashing will be on the top of the shingles. Secure the flashing with 4 hex head screws at the 3:00, 6:00, 9:00 & 12:00 positions.  The screws are placed under the shingles.   At the 6:00 position, caulk over the screw head sinse it will be exposed to the weather.  Use 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.

video:   

http://www.thisoldhouse.com/toh/video/0,,20047003,00.html