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recommend a good solar attic fan? #4656492
02/04/18 11:38 PM
02/04/18 11:38 PM
Joined: Apr 2004
Posts: 3,680
los angeles
daves66nova Offline OP
daves66nova  Offline OP
Joined: Apr 2004
Posts: 3,680
los angeles
I'm looking to install one on my roof here soon. What's a decent one? Thanks


THIS SPACE FOR RENT, PLEASE PM ME.
Re: recommend a good solar attic fan? [Re: daves66nova] #4656499
02/04/18 11:59 PM
02/04/18 11:59 PM
Joined: Sep 2014
Posts: 2,193
US-WA
Dyusik Offline
Dyusik  Offline
Joined: Sep 2014
Posts: 2,193
US-WA
No clue what's good in the solars but here is a thought. More inlet screens (the 2x4x24's) will produce a massive amount of ventilation without any additional mechanical supplement. In the summer heat, I open the access panel in the garage and a huge current of air rushes through. A gable vent is also a good idea.


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Re: recommend a good solar attic fan? [Re: Dyusik] #4656549
02/05/18 03:51 AM
02/05/18 03:51 AM
Joined: Apr 2003
Posts: 120
TX
fields Offline
fields  Offline
Joined: Apr 2003
Posts: 120
TX
My dad had a 4 X 8 sheet of plywood on the porch we would take down for summer.

Re: recommend a good solar attic fan? [Re: fields] #4656593
02/05/18 06:45 AM
02/05/18 06:45 AM
Joined: Apr 2004
Posts: 3,680
los angeles
daves66nova Offline OP
daves66nova  Offline OP
Joined: Apr 2004
Posts: 3,680
los angeles
Originally Posted By: fields
My dad had a 4 X 8 sheet of plywood on the porch we would take down for summer.
So what does that have to do with RECOMMENDING a solar fan???


THIS SPACE FOR RENT, PLEASE PM ME.
Re: recommend a good solar attic fan? [Re: daves66nova] #4656623
02/05/18 07:24 AM
02/05/18 07:24 AM
Joined: May 2003
Posts: 9,375
Central Coast, Calif.
tom slick Offline
tom slick  Offline
Joined: May 2003
Posts: 9,375
Central Coast, Calif.
I installed US Sunlight fans about 5 years ago. Iíve had no issues with them and they move a lot of air.


You get what you pay for...
So keep in mind how much you paid for this advice.
Re: recommend a good solar attic fan? [Re: daves66nova] #4656633
02/05/18 07:42 AM
02/05/18 07:42 AM
Joined: Feb 2003
Posts: 7,852
Jupiter, Florida
Cujet Offline
Cujet  Offline
Joined: Feb 2003
Posts: 7,852
Jupiter, Florida


I have that exact setup (the two of them pictured) pictured on the solarfanatics website. It's quite good, they move a good bit of air, and they've held up to 3 direct hit hurricanes.

This model is available from various sources, so make sure to shop around for a good price.

http://www.solarfanatics.com/


Last edited by Cujet; 02/05/18 07:45 AM.

People who count on their fingers should maintain a discreet silence.
Re: recommend a good solar attic fan? [Re: daves66nova] #4656668
02/05/18 08:35 AM
02/05/18 08:35 AM
Joined: Jan 2017
Posts: 406
NJ
JLawrence08648 Offline
JLawrence08648  Offline
Joined: Jan 2017
Posts: 406
NJ
You need draw from the right locations to move heat out. If you use an attic fan, you should seal your gable vents and have no ridge vents only soffit vents. This will create draw from the bottom moving heat out. Your attic fan should be near the peak. If you put an attic fan in without blocking the gable, and have a ridge vent, the air will pull from the gable or the ridge vent but the doctor vent. You will not be moving the heat away from the inside ceiling of the living space of the house.

Also you need velocity. Drawing from the larger gable vents you are not creating velocity. It's best to draw from a smaller area to create velocity, which the soffit vents are.

Re: recommend a good solar attic fan? [Re: daves66nova] #4656685
02/05/18 08:53 AM
02/05/18 08:53 AM
Joined: Oct 2002
Posts: 2,976
North TX
RTexasF Offline
RTexasF  Offline
Joined: Oct 2002
Posts: 2,976
North TX
Our two powered attic vents needed replacing so I looked into the solar powered ones. For us the cost was prohibitive. We ended up with two standard electric powered replacements installed for less than the price of one solar powered model in a box. No doubt the solar would prove less expensive in use over time but we're in (or near) our 70's so standard power made more sense.

Re: recommend a good solar attic fan? [Re: daves66nova] #4656696
02/05/18 09:09 AM
02/05/18 09:09 AM
Joined: Dec 2013
Posts: 2,099
socal
barkingspider Offline
barkingspider  Offline
Joined: Dec 2013
Posts: 2,099
socal
When I researched this years ago, I learned that the electrical fans move a ton more air than solar for less money. I just donít know that any of the solar powered one would make a noticeable difference. Thatís why I chose not to get a solar fan


06 Cadillac Escalade Ext
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Re: recommend a good solar attic fan? [Re: daves66nova] #4656732
02/05/18 09:36 AM
02/05/18 09:36 AM
Joined: Aug 2017
Posts: 594
Nebraska
BJD78 Offline
BJD78  Offline
Joined: Aug 2017
Posts: 594
Nebraska
Had 2 Remington 20 watt solar fans about $200.00 each from home depot. They keep our attic a good 15 degrees cooler that out door air and worked well for 3 years then we had a bad driving hailstorm in 2016 and it shattered the solar panels. Did not feel like spending $400 again so elected to go with 2 cheaper passive spinning turbine vents instead and they seem to work well also. Not sure how often you get hail storms in LA but if you do not get hail or hail is very rare a solar fan would probably be the best option.


2010 Forester:122K
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2010 Tucson:55K

OCI 5K using the cheapest dino oil I can buy,usually NAPA or TSC Travelers oil.
Re: recommend a good solar attic fan? [Re: daves66nova] #4656786
02/05/18 10:19 AM
02/05/18 10:19 AM
Joined: Dec 2002
Posts: 1,624
North Carolina
Rat407 Offline
Rat407  Offline
Joined: Dec 2002
Posts: 1,624
North Carolina
A ridge vent is the way to go, unless you do not have enough ridge to properly vent the roof. Then a power vent works best.

Solar attic vent vs ridge vent


2002 Silverado 5.3 0w-20 AMSOILģ
Re: recommend a good solar attic fan? [Re: daves66nova] #4656957
02/05/18 01:16 PM
02/05/18 01:16 PM
Joined: Sep 2012
Posts: 5,488
DFW
DBMaster Offline
DBMaster  Offline
Joined: Sep 2012
Posts: 5,488
DFW
My house was built with ridge vents. They are definitely effective, but by adding an electric (not solar) fan to the mix I measure a 10 degree temperature drop in the attic area that is directly above the ceiling.

Re: recommend a good solar attic fan? [Re: daves66nova] #4657630
02/06/18 07:00 AM
02/06/18 07:00 AM
Joined: Feb 2003
Posts: 7,852
Jupiter, Florida
Cujet Offline
Cujet  Offline
Joined: Feb 2003
Posts: 7,852
Jupiter, Florida
I have two mounted near the roof peak. I live in South Florida, so it's sunny and hot. They do not move anywhere near as much air as a big 120V powered fan would. However, I've also found that I don't need that much air moved. As these things are sufficiently capable of moving the heat out.

My home is 2500 square feet, plus a 3 car garage with a large storage attic over the garage, and a good sized patio. Total roof area is about 3500 square feet.

My house has eves that are well vented and just the 2 fans. The airflow is clearly robust, and standing in the attic staircase, one can feel the upward airflow.

The attic temp is maintained at roughly the outdoor temp. It's no problem what so ever, to go in the attic and work.

My previous home had ridge vents. The attic was regularly 140 degrees.

Ah ha! I've found the actual brand (natural light) and they are available here: https://www.amazon.com/Solar-Attic-24-watt-25-year-warranty/dp/B001OULVQM

Last edited by Cujet; 02/06/18 07:10 AM.

People who count on their fingers should maintain a discreet silence.

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