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Old 03-16-2014, 02:22 PM   #11
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Rdavid,

Dumping that much moisture into your basement isn't a good idea. Could lead to mold. The fact that it dissipates quickly helps. If you stick with this method at the very least I would get a dehumidifier.

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Old 03-16-2014, 06:26 PM   #12
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If you're worried about pulling your home in a vacuum, open 2 or 3 window's an inch or two. That's it, all ya gotta do. When I was starting out in HVAC 20 years ago whole house fans were popular (very big fans) and some customers would have the pilot light sucked off the thermocouple. Just cracking a window would fix the problem. If you want to check draft, light a match and watch the direction the flame points. You can do this at the incoming fresh air /make up air points, like the cracked window.

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Old 03-19-2014, 12:53 PM   #13
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Originally Posted by kevreh View Post
Rdavid,

Dumping that much moisture into your basement isn't a good idea. Could lead to mold. The fact that it dissipates quickly helps. If you stick with this method at the very least I would get a dehumidifier at the least.
Very good suggestion. I was not thinking about mold. I just got a big dehumidifier that will pump into my utility sink. Thanks for the heads up.
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Old 03-19-2014, 09:44 PM   #14
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Originally Posted by BBL_Brewer View Post
A box fan is not going to create that much of a pressure gradient, it just isn't powerful enough.
+1

You'll really only get negative pressure if you have a duct fan that is directly connected to the outside.

A freestanding/standalone fan in the room blowing in the general direction of the window won't cause negative pressure.

If you put this fan in the window and have it such that it seals the inside from outside then yes, you could get a negative pressure.

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I also don' t think you need two of them. I think one by the basement window would be fine.
+1 again.

I would simply put the fan in the window but make sure it's not really sealing inside from outside. You'll get air coming in on the sides to make up what you're blowing out. A bit of circulation will occur (maybe) but you should be ok.

Best would be to have another window in the basement open if you have one (I don't think you do). Another window open upstairs would work too but then you're evacuating your house air which is going to cost you in either heating (furnace) or cooling (AC) depending on the time of year.

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Dumping that much moisture into your basement isn't a good idea.
+1 to this as well. (I'm full of +1's today!)

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Old 03-20-2014, 12:22 AM   #15
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Very good suggestion. I was not thinking about mold. I just got a big dehumidifier that will pump into my utility sink. Thanks for the heads up.
You know, for about $100 and the price of ducting, you could do what I just did. Get an inline fan (@$75 on Amazon), and fan speed controller (@$25). Use 4" duct to go outside between your joist bays. Use a dryer vent with self closing doors/flaps. Buy or rent a ~4" hole saw to drill the hole for the vent to the outside. Fabricate a makeshift hood out of anything like plywood or foamcore, at least initially. Good little saturday project.
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Old 03-20-2014, 04:52 PM   #16
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Dude, you really need to learn how to scale pictures for viewing on the internet.

GIANTEST PICTURES EVAR

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Old 03-23-2014, 07:42 PM   #17
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Originally Posted by kevreh View Post
You know, for about $100 and the price of ducting, you could do what I just did. Get an inline fan (@$75 on Amazon), and fan speed controller (@$25). Use 4" duct to go outside between your joist bays. Use a dryer vent with self closing doors/flaps. Buy or rent a ~4" hole saw to drill the hole for the vent to the outside. Fabricate a makeshift hood out of anything like plywood or foamcore, at least initially. Good little saturday project.
Which fan and speed controller from Amazon did you get?
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Old 03-23-2014, 09:17 PM   #18
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Quote:
Originally Posted by kevreh View Post
You know, for about $100 and the price of ducting, you could do what I just did. Get an inline fan (@$75 on Amazon), and fan speed controller (@$25). Use 4" duct to go outside between your joist bays. Use a dryer vent with self closing doors/flaps. Buy or rent a ~4" hole saw to drill the hole for the vent to the outside. Fabricate a makeshift hood out of anything like plywood or foamcore, at least initially. Good little saturday project.
Good idea - I may do that. Just to test I took a humidity reading in my basement at 32% and then boiled off 2.5 gallons and the reading was 64%! I kept all the windows and doors shut overnight and then took a reading in the morning at 32%. I think its not too much of a problem when its cold out and the heat is on. The summer will be much worse. I got a good sized dehumidifier that has a built in pump and ran the drain line up to a pipe that dumps into my utility sink that I have for my reef fish tank on the above floor. I boiled off about a gallon with it running and it came back to 32% in about two hours. Mold is no joke - thanks again for the heads up.
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Old 03-23-2014, 09:17 PM   #19
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Dude, you really need to learn how to scale pictures for viewing on the internet.

GIANTEST PICTURES EVAR
WHAT?

lol - I will fix it.
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