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Forum: Solar Heating

10-31-10, 12:56 PM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

I like your design, except that I would probably...

I like your design, except that I would probably put the filter in the top or end of the box to make it easier to change.

Forum: Solar Heating

10-30-10, 05:55 PM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

How hot does the flue get? You probably don't...

How hot does the flue get? You probably don't want wood touching it unless it is the double-wall type.

Forum: Solar Heating

10-25-10, 09:35 AM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

OK, that makes sense. So no loss from running the...

OK, that makes sense. So no loss from running the fans.

Daox, are you going to provide an air return to the attic? Or dump the additional air outside like an evaporative cooler?

Forum: Solar Heating

10-24-10, 07:37 PM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

How much air do the fans move when they're...

How much air do the fans move when they're running? How do you calculate that the fans are providing more than 100W worth of additional heat to the house, i.e. that you're getting more hot air with...

Forum: Solar Heating

10-02-10, 02:52 PM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

Cool! I mean Warm! :D You could rig it up with a...

Cool! I mean Warm! :D You could rig it up with a thermostat (maybe from an attic fan) in the attic and another thermostat (for a heatpump or a furnace) in series in the kitchen so that the fan only...

Forum: Solar Heating

09-23-10, 01:18 PM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

If you push 300 cfm through a 6" duct you'll have...

If you push 300 cfm through a 6" duct you'll have a 17 mph breeze coming out of it (appx).

Forum: Solar Heating

09-23-10, 10:25 AM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

Here's a cheap one if you don't want to invest a...

Here's a cheap one if you don't want to invest a lot of money for a test: https://www.surpluscenter.com/item.asp?item=16-1394&catname=electric

Forum: Solar Heating

09-23-10, 10:21 AM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

Here are 2 complete blowers:...

Here are 2 complete blowers: https://www.surpluscenter.com/item.asp?item=16-1386&catname=electric

https://www.surpluscenter.com/item.asp?item=16-1387&catname=electric

Forum: Solar Heating

09-23-10, 10:17 AM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

Here's a 120V motor that you might be able to...

Here's a 120V motor that you might be able to make work: https://www.surpluscenter.com/item.asp?item=10-1746&catname=electric

Forum: Solar Heating

09-23-10, 10:10 AM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

If you use a car blower you can power it with PV...

If you use a car blower you can power it with PV panels. :D

I don't know about disconnecting one leg of 220. I think they make similar motors in 120V, though.

Forum: Solar Heating

09-23-10, 08:48 AM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

Set the blower up in the attic so that the...

Set the blower up in the attic so that the discharge blows down the chimney.

Forum: Solar Heating

09-23-10, 08:46 AM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

It might too high velocity for this application,...

It might too high velocity for this application, but if you've got a leaf blower you could try setting it up with the discharge down the chimney.

Forum: Solar Heating

09-23-10, 08:36 AM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

If you're going to use a squirrel cage fan, you...

If you're going to use a squirrel cage fan, you can run it down the chimney since the discharge area is typically a lot smaller than a box fan. And it does produce a higher pressure differential than...

Forum: Solar Heating

09-14-10, 08:05 PM

Replies: 219

Using attic heat for the house

Views: 222,056

Posted By Patrick

I would want some type of filtration on any attic...

I would want some type of filtration on any attic air that I sent into the house. Too many bugs around here. And you don't want any insulation (especially if it's fiberglass) drawn into the house.

Showing results 1 to 14 of 14

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