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smithfly114
Premium
join:2008-01-14

Need ideas on how to install solar air heat device on roof.

Click for full size
Hi all,

I have been thinking about how to incorporate a device like this into my house:
»www.n3fjp.com/solar/solarhotair.htm

It would need to go on the roof in order to maximize solar exposure.

A picture of my roof is attached.
It is cement shingles, fairly fragile and difficult to work with.

I am trying to figure out what the best way would be to bring the air vents up and down to/from the solar collector.

Through the roof would be the best, as it would have less turns to restrict the airflow, around the edge of the roof and down the side of the house would be easier because no holes in roof, but might restrict airflow some.

Does anyone here have thoughts?
The air pipes would be two 4" PVC.


tp0d
yabbazooie
Premium
join:2001-02-13
Carnegie, PA
kudos:2

Wow... i read the whole page you linked... looks like a pretty cool (or hot.. heh) idea. Dunno about a roof mount, you would need to face it southerly, and if your picture is north/south situated already, you dont have a good place to mount it..

hmmmm i have a very nice southern exposure area on my house, might have to give this a go..

tnx for the link!

-j
--
if it aint broke, tweak it!!
currently on FiOS (kick aZZ!)



smithfly114
Premium
join:2008-01-14

Yea it is a very interesting topic.
The picture is actually oriented with north to the left, south to the right of the picture, but either way, not the best mounting areas...



cowboyro

join:2000-10-11
Shelton, CT
Reviews:
·AT&T U-Verse

reply to smithfly114
Before starting anything big do a survey of the sun exposure. In some instances it may be clear (you have maximum sun exposure around noon) but in others you'll have to figure which side gives you the best return. Depending on location, maximum gain may be around 11AM or 2PM. The angle is also very important...
I have solar collectors for my pool, turned out that the best gain was on a side that was getting most sun during 10AM-1PM vs a side that was getting sun from 11AM to 5PM (in my location the heat from the sun during summer tends to go down after 11AM or so as clouds start forming)



Daarken
Rara Avises
Premium
join:2005-01-12
Southwest LA
kudos:1
Reviews:
·Cox HSI

1 edit

reply to smithfly114
Your problem is with your home being so close to the other neighbors you have to mount your device on the roof, or vertically on the wall.
The other problem is your location in the US..
Most of the people who are taking advantage of these solar heat collectors are in the northern part of the US.
With the collectors low to the ground, they are piped directly into the basement, which allows the hot air to rise to the above floors.
Forgive me if I am wrong, but as far as I can tell, you do not have a basement.
So give us a few more details about your house.
Basement?
Where is your HVAC located?
How much sun does the southern walls receive?

With that type of roof construction, I would be really apprehensive about attaching a structure to it.
You might need to put it on standoffs and have it installed on the side as high as possible.

I have seen this done by a (maybe) Canadian company, however it looked like it was a mom & pop operation, that used soda/beer cans for the heat collection.

--
Getting it Done.



nunya
Who is John Galt?
Premium,MVM
join:2000-12-23
O Fallon, MO
kudos:5
Reviews:
·Charter
·voip.ms

reply to smithfly114
About every fourth house on my street still has these. Most have been removed. These were actually "built in" to the roof. They do work, somewhat. They aren't going to heat the entire house.

They were installed in the 70's. Apparently, the salesman was really good at his job, because a lot of people in the neighborhood got them. Note that they definitely were not original.

Most were removed because they leaked water in the rain and snow, and cold air at night.
--
...because I care.


neonturbo

join:2009-02-27
Lansing, MI

reply to smithfly114
This may not directly help you, but I have been thinking about putting them directly on my South wall. I would cut a hole into the top of the living room wall near the ceiling, and take air from either the basement or the bottom of the living room wall.

These guys are running them horizontally, but I thought vertically would be easier on my house. Any chance you could do the same?

Thanks for the website, I have not seen that before.



smithfly114
Premium
join:2008-01-14

reply to Daarken
This is true.
I do not have a basement, and there is not enough sunlight that hits the south wall to put it there.

I am starting to think this might not be practical for my house.

Either way, vertically or horizontally it would have to be on the roof, the neighbors house to the south blocks too much sunlight to put the collectors on the south wall.


neonturbo

join:2009-02-27
Lansing, MI

You could have a roofer come and put two plumbing vent stacks with boots through the roof. If you decide to take the solar collector off, it would look like two plumbing stacks.



nunya
Who is John Galt?
Premium,MVM
join:2000-12-23
O Fallon, MO
kudos:5
Reviews:
·Charter
·voip.ms

reply to smithfly114
There was a story on the local news tonight about a municipality blocking the installation of solar panels on a house. You might want to make sure there are no restrictions in your area. All it takes is one complaining neighbor.
--
...because I care.


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