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Needing help moving air in a stagnant basement. #15009079 06/29/20
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Older home (1947) , 2 story home (3 including basement) on a conventional foundation. Basement measures close to that of a single car garage, ceiling is open to floor joist of 1st floor, 3 foot opening to remainder of 1st floor footprint. Home is approximate 2500 sq foot. Imagine a hole 12 deep 15x15 with the remainder of the crawl space 3 foot headroom for the remaining home footprint. 5 air vents 2 foot above ground level spaceD around perimeter of home. Home is rectangle shape.
This is a rental house, a nicer property with a cost basis of a tad better than 300k I am using to generate income for the foreseeable future.
Would like to be prudent while also maintaining the value of property.

1) how many exhaust fans would you use to “pull the air” through the space
2) would you place them on same side of house, or opposite sides
3) what size of motor would you have paired with your fan
4) if I am looking past or forgetting any other best practice for long term solution

I will appreciate any input, thank you.

BP-B2

Re: Needing help moving air in a stagnant basement. [Re: Sharecropper] #15009102 06/29/20
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MM879 Offline
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Air conditioning will solve all your problems. The other methods will create new different problems.

Re: Needing help moving air in a stagnant basement. [Re: Sharecropper] #15009107 06/29/20
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NVhntr Online Content
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One properly sized fan at the vent of your choice will pull air into the basement/crawlspace and exhaust it outside.
This only works if the air you're pulling in is dryer than the air in the basement.

Based on the dimensions you provided, a 400 cfm fan would provide one air change every 22 minutes.
A fan controlled by a humidistat wouldn't need to run 24/7.

Why do you think you need additional ventilation? Is there moisture damage evident?


Steve
Re: Needing help moving air in a stagnant basement. [Re: NVhntr] #15009179 06/29/20
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NV,
There was light mold when we purchased the home. We had the test run, and they were negative. ( this was expensive as hell)
Had the basement taken down to the studs washed cleaned and completely remodeled. I simply do not want a problem to manifest when I can control the environment the right way and prevent a problem that is preventable with a little investment.
This property could now be sold at a reasonable price of 475-500k and would like to maintain the value.
Thank you for your input.

Re: Needing help moving air in a stagnant basement. [Re: Sharecropper] #15009263 06/29/20
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Slow and steady wins the race?

One of the little 3x3" computer fans and a little 6-12v solar panel might do it.

If not one, try two..


-OMotS



"If memory serves fails me..."
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Re: Needing help moving air in a stagnant basement. [Re: Sharecropper] #15009276 06/29/20
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Until you get your circulation issue resolved you might want to use Damp-Rid to keep the moisture out. It does work. Not for long term.

Home Depot has it.


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Re: Needing help moving air in a stagnant basement. [Re: Sharecropper] #15009360 06/29/20
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If there is an available floor drain or sump a dehumidifier would also be an option. With that you could just set the desired humidity level.


Steve
Re: Needing help moving air in a stagnant basement. [Re: Sharecropper] #15009370 06/29/20
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Fubarski Online Content
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Radon fan.

Re: Needing help moving air in a stagnant basement. [Re: OldmanoftheSea] #15009384 06/29/20
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Originally Posted by OldmanoftheSea
Slow and steady wins the race?

One of the little 3x3" computer fans and a little 6-12v solar panel might do it.

If not one, try two..


I really like this idea!


Blessed is the nation whose God is the Lord.. Psalm 33:12
Re: Needing help moving air in a stagnant basement. [Re: Sharecropper] #15009438 06/29/20
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Dehumidifier

I have a heavy old metal one at home.
It works fine .
I was going to buy a few for my former school, but was having trouble finding good reliability ratings.
Maybe a yard sale will turn one up. Test first.

PS: How did we take care of the moisture issue in the bottom two stories... basement indoor swimming pool and basketball court with balcony? It was comfortable year round since part of one floor was underground.
So we didn't need air conditioning.

We had a manual and thermostat controlled large exhaust fan. When classes were in session, we ran that and a floor fan during the summer. Humidity was not as much in the winter. Boiler/ radiator heat.

Last edited by Happy_Camper; 06/29/20.
IC-B

Re: Needing help moving air in a stagnant basement. [Re: NVhntr] #15009987 06/30/20
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Originally Posted by NVhntr
If there is an available floor drain or sump a dehumidifier would also be an option. With that you could just set the desired humidity level.


You can get dehumidifiers with built in pumps that will lift the condensate up to about 16ft (?).

Re: Needing help moving air in a stagnant basement. [Re: Sharecropper] #15010058 06/30/20
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Is the space finished and living area? Conditioned space? Your HVAC should exchange and 'condition' air in that space, if it is not you need to modify it so that it does.


A true sportsman counts his achievements in proportion to the effort involved and fairness of the sport. - S. Pope
Re: Needing help moving air in a stagnant basement. [Re: NVhntr] #15010155 06/30/20
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Originally Posted by NVhntr
If there is an available floor drain or sump a dehumidifier would also be an option. With that you could just set the desired humidity level.


This. I have AC in my home but the basement is always cooler and smells just "off". Running a dehumidifier into a floor drain moves the air and takes out the excess moisture. I set it for 60% humidity. YMMV


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