Help with humidity... - Page 3

banditpowdercoat · #21 10-20-2009, 02:14 AM

Ya, the base of the windows are starting to grow mold. Attacking them with bleach tomorrow... Most of them are just soaked, I've had enough.... Have both the hallway and bathroom exhaust fans on now, I can feel it pulling a breeze through the house. We'll see how well that works. Shut 2 150W lights off on the 150g too, only a 250W on now. to lessen the evap. It's still been climbing from 78 to 81 every night. Have a 6" clip on fan on top, blowing across water, under the halides 24/7 right now. House is usually 69. raised temp to 71.

BTW, Im in a Mobile home too, not a house. In case that makes any differenmt how they trap moisture? I kmow I keep callin it a house, guess I'm afraid of being called trailer trash LMAO....

Binare · #22 10-20-2009, 02:25 AM

I know nothing about humidity but do you got a lot of heat trace under your trailer? I had to do a service call and redo some splices on trace about 4 years ago this time of year... There was a fog so dense under there couldn't see inches from my nose. Had to turn off the heat trace and run a fan for an hour, that cleared it up. Just brainstorming here.

StirCrazy · #23 10-20-2009, 02:44 AM

here is an article on mobile homes and moisture problems, and what kind of things to look for.
http://www.huduser.org/publications/pdf/moisture.pdf

Steve

banditpowdercoat · #24 10-20-2009, 03:31 AM

Thx Steve.

Binare, Only heatreace is on the incoming water line, no issues there. The under house is ventalated well. To well in fact. Some missing areas of skirting, thx to snow coming off roof @ -30c. Have to put some plastic up and sheet it off here real soon. It's on my list to do before Nov.

robert · #25 10-20-2009, 03:57 AM

Quote:

Originally Posted by StirCrazy

ok so to show the effect heating had on relitive humidity here is an example.

the relitive humidity outside in 100 mile house is 78% at 5.5 degrees c, so if you bring that air into the house and heat it to 22 c then the relitive humidity becomes 27% so realy if you ran the fan and brought new heated air in you could drop your humidity pretty quick. the problem starts when us cheep buggers keep the house cold

by dropping the temp 4 degrees to 18 we raise the relitive humidity by almost 10%

Steve

Yeah, Steve makes a good point about relationship between humidity and temperature. Go here to play

In winter time, the key is pulling in plenty of fresh cold air and heat it up to higher temperature. I guess here on the west cost we can do that just by keeping window open and furnace working at the same time

Yes, HVR would improve that process by using heat exchanger - using warm indoor air on its way out to heat cool outdoor incoming air.

Doug · #26 10-20-2009, 12:53 PM

Dan, I also live in a modular/mobile, {whatever a mobile is, I,m not sure}. If newer like mine, they are very well insulated and require good air exchange. I have a good whole house exchanger but certainly not efficient like the HRV units, {the only way to go}, I had in my houses.

If you notice most my recent build threads relate to this and part of the current reason I now have a small aquarium, is to keep evaporation problems to a minimum and still enjoy the hobby.

Ours was a disply when we purchased it otherwise it would have been ordered with an HRV installed. That being said, I think its hard to put one in after market, asone has not access to run vents, etc, without removing the complete underbelly insulation and protection.