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Old 03-09-2010, 06:26 AM   #1
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new user ...and a lot of questions... plenum,ductwork etc


hi everyone ,
I'm a new user,
I'm Italian, so I'm sorry for my English....(I'm studying it)
i just bought a house in Bellevile Ontario, this house is also a B&B and is 2 stories 1500/2000 sqft...
previous owner changed the furnace in 2006 , the furnace is a goodman 90000 btu, and 1600 cfm .
the house i composed of an old part (that is th guest part) and a extension the we will use as private.
the problem...
the private part of the house doesn't get warm enough,
i started to check the heating system, read some articles, and i found this forum...
and now i have some question for you guys:


1 who installed the new furnace didn't change the plenum and the ductworks...the results is that:




View image: furnace.jpg


that 's another picture of the plenum



View image: P1030874.jpg

that's a kind of bottle neck right?

i have to modify it , right?

another issue that i found is the extendend plenum (the system has 2 extended plenums) of my part of the house is 12X8 but there is only a 8x8 return grill connected to the return air plenum by a 5" round duct!

i put in the rooms approx 200 cfm (5" per 3 registers) but the 5" round suck only 60 cfm circa....
the only way that i see to improve the return air is put a duct fan booster, it will work???

please help me....
next time i will about the downstairs master bedroom issue...

thanks a lot gabriele

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Old 03-09-2010, 04:55 PM   #2
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new user ...and a lot of questions... plenum,ductwork etc


Trunks are way too small to handle good air flow with out sounding like a wind tunnel.

Booster fans dont do a darn thing.

Wait for some more opinions.

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Old 03-09-2010, 06:02 PM   #3
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new user ...and a lot of questions... plenum,ductwork etc


You got more then 1 bottle neck on that work of art.

Increase the return to your private section to full size.
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Old 03-09-2010, 07:23 PM   #4
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new user ...and a lot of questions... plenum,ductwork etc


Quote:
Originally Posted by beenthere View Post
You got more then 1 bottle neck on that work of art.

Increase the return to your private section to full size.

Been every time I have come across the plenum that HO has I have had to relocate the furnace so the duct work ran left and right.

I don't know what the guys were thinking when the installed that./
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Old 03-09-2010, 09:27 PM   #5
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new user ...and a lot of questions... plenum,ductwork etc


Quote:
Originally Posted by beenthere View Post
You got more then 1 bottle neck on that work of art.

Increase the return to your private section to full size.

thanks , so if i have three 5" register, three 5" or equivalent for the return air?
that 's any chance in your opinion ,to use a fan boost on the existing 5" return air? i'm asking thet because it will be the simple way....
as i could see that's not more space to add another duct for the return air....

thanks
gabriele

and wath about the other bottle neck?
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Old 03-09-2010, 09:30 PM   #6
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new user ...and a lot of questions... plenum,ductwork etc


Quote:
Originally Posted by hvaclover View Post
Been every time I have come across the plenum that HO has I have had to relocate the furnace so the duct work ran left and right.

I don't know what the guys were thinking when the installed that./

thank for the answers, but i'm really not able to relocate the furnace...
my target is optimize that system , following your advices

thanks
gabriele


...and sorry for my english
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Old 03-09-2010, 09:44 PM   #7
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new user ...and a lot of questions... plenum,ductwork etc


Quote:
Originally Posted by pezzodefero View Post
thank for the answers, but i'm really not able to relocate the furnace...
my target is optimize that system , following your advices

thanks
gabriele


...and sorry for my english
No body faulted your English and I think you just play the martyr by posting that.

I also did not say you had to move your furnace. That was one pro talking to another about how crummy some jobs are done.
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Old 03-09-2010, 10:01 PM   #8
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new user ...and a lot of questions... plenum,ductwork etc


Quote:
Originally Posted by hvaclover View Post
No body faulted your English and I think you just play the martyr by posting that.
i'll take it like a compliment for my english, thank you.


Quote:
Originally Posted by hvaclover View Post
I also did not say you had to move your furnace. That was one pro talking to another about how crummy some jobs are done.
but hvaclover belive me, i didn't catch any advice for my system...
please help me.

thanks
gabriele

and sorry for....just kidding

Last edited by pezzodefero; 03-09-2010 at 10:13 PM.
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Old 03-10-2010, 04:42 AM   #9
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new user ...and a lot of questions... plenum,ductwork etc


Do you mean you have no room to increase return size going to the private section. or you don't have room at the furnace.


There is room at the furnace for more return.

Booster fans will probably do nothing more then increase your electric bill, and make your returns loud.

Can you post pics of how the ducts travel to the private section.
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Old 03-10-2010, 08:57 PM   #10
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Quote:
Originally Posted by beenthere View Post
Do you mean you have no room to increase return size going to the private section. or you don't have room at the furnace.


There is room at the furnace for more return.

Booster fans will probably do nothing more then increase your electric bill, and make your returns loud.

Can you post pics of how the ducts travel to the private section.
i mean i have no room to increase return size going to the private section.

this is another picture of the furnace with the ductwork for the private part.

http://www.postimage.org/image.php?v=aVfAjPA


this the windows of the basament... where the ductwork go.
http://www.postimage.org/image.php?v=TsGGFd9

behind the windows ther is a little crawl space (where i can stand up), but from there i can only see the ductwork to go in the celing

,

tomoroow i will post a map of the of private section.
i have to scan it.

thanks for your help
gabriele
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Old 03-11-2010, 11:01 PM   #11
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new user ...and a lot of questions... plenum,ductwork etc


the picture attached is the floorplan of the private part of the house

1,2,3 are the register attached to a 5"round duct
4 is a register to a 6"

r1 is the return air for the main floor

in yellow are the ductworks into the celing (without access, actually i can do everything in the kitchen, but only in the kitchen)

A is the stairs that go to the master bedroom downstairs (no doors)

in the dawnstairs there aren't any register
in grey/purple is the modify that i want to do:
a 8" inch round for the heating/cooling of the downstairs (grey)
(i have to drill a stone wall) it will be at 70"
from the ground (downstairs)

10" inch round (or square) for the return air of the downstairs and to support the return air of the main floor (private) it will be at 3" from the ground (downstairs)


what do you think?
http://www.postimage.org/image.php?v=aViwENi


windows basament
http://www.postimage.org/image.php?v=TsGGFd9

thanks for your time
gabriele



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