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Bert

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Reply with quote  #41 
The far crawl space doesn't look clean enough. It does have plastic on the floor, but there's a lot of dust, cobwebs and exposed fiberglass insulation.

3 ducts.jpg 
floor.jpg 
overview.jpg 
dusty.jpg 
There's really no space to get another duct through there.




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Bert K.
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gbwillson

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Reply with quote  #42 
I was going to ask you for some photos of the crawlspace. Could you tap into one of the existing ducts?

Greg in MN
Bert

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Reply with quote  #43 
Quote:
Originally Posted by gbwillson
I was going to ask you for some photos of the crawlspace. Could you tap into one of the existing ducts?

Greg in MN


Not sure, but that would limit me to the family room and I'm not sure how well it work work with the furnace and solar heater sharing it.

BTW I was thinking about this fan.
http://www.amazon.com/dp/B006Z1JLN0/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=1FQY0OJGHH9HE&coliid=I3UWJDMJ7OUFZ0&psc=1

 Since it will be a long collector. 
Maybe with a fan speed control to find the best setting.What do you think?

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Bert K.
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stmbtwle

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Reply with quote  #44 
Sounds like a good plan to me.
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Willie, Tampa Bay
gbwillson

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Reply with quote  #45 
Bert-

Aren't any of the ducts in the photos returns to the furnace? That fan would move plenty of air, and you have plenty of time to shop around. A speed control can reduce the fan output a little bit, so you could alway try your system without and add it if you feel the need. My fan is rated at 500CFM and I'm pushing out about 80% of that without a speed control and I have over 50' of ducts. But since I want every last BTU and since the fan is in the basement, I don't mind a bit more noise. 

Greg in MN
Bert

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Reply with quote  #46 
I want to squeeze all the heat out I can also. Figured the fan may not be too loud in either the crawl space or basement with 8" ducts.
One of those may be a return duct. I will have to check into it. At 64 I hate crawling in there. Not crazy about small enclosed spaces either.
Usually I have to wait a few days in between LOL.


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Bert K.
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gbwillson

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Reply with quote  #47 
Bert-

Since you will be pushing your ZP at high velocity, could you simply have the warm exhaust air directed into another room? I can feel a blast of warm air across the workshop when my ZP is running. So you intake could be in the family room, but the main stream of air could be directed from the ZP exhaust, through the family room, and into the next rooms. Although it might be too much of a breeze in the main living space.

Greg in MN
Bert

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Reply with quote  #48 
There's just no way to get from the backend of the house up to the return which is about 20' from it. The 20' is where the dirty crawl space reaches the cleaner, roomier crawl space.

The return duct only goes as far as the opening between the two crawl spaces. I just don't see a way to have the input and output on opposite ends without going through  the living area wall.

I would really like to have the heat go into either the clean crawl space or the basement.
Not to scale.

BPLAN.jpg
You can see the little black opening between the crawl spaces. That's as far as the return duct goes.



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Bert K.
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gbwillson

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Reply with quote  #49 
I'm not thinking of ducts in the crawl space, but a strong stream of air across the family room and out a doorway into the rest of the house.  A directed stream of warm air from your collector, through the South wall, could blow all the way across the family room to other parts the house. The high velocity fan you are currently using has a very direct stream of air that can be felt several yards away. Could the intake could come from the crawlspace or South wall of the family room?

Greg
Bert

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Reply with quote  #50 
The family room is directly above the dirty crawl space, so it wouldn't be possible through that part of the crawl space.  They were added on sometime after the original house was built, I assume.

Over the clean crawl space is a bathroom at the south wall and then beyond that the kitchen.

I am in the family room a lot and if it came directly in it, the noise may be a bit much. 
Wouldn't the heat going into the crawlspace and basement heat the upstairs a decent amount? It would be quieter I believe.


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Bert K.
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