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#1
02-04-2006, 12:31 AM
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I'll chime in a bit here since I've been looking into this closely as I plan my 360 installation.
The humidex basically a combination of a vent fan and a humidistat that turns the fan on/off based on humidity. It vents out of the house only, and depends on "leaks" in the house to bring new air in. That would be a concern in a very new, tight house due to negative pressure. A good vent fan to the exterior attached to a humidistat would do about the same thing. I would guess it would cost less, but require a bit of DIY. Finally, the last thing I'll mention is that it would be good to control the space where the humidity accumulates. If you can get good containment of the tank and fish room, you have a smaller air volume to deal with. 
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#2
02-04-2006, 02:42 AM
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I was just going to run the bathroom fan 24/7. This winter is crazy warm, so I am not too concerned about the cold air coming in. Next winter might be different.
How effective are de-humidifiers?
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#4
02-04-2006, 03:58 AM
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Thanks mark, will do.
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#5
02-04-2006, 04:21 AM
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my dehumidifier works OK. not the greatest. we're having a HRV installed sometime in the near future to deal with the mugginess of the house. the humidity heightens the smell of the pets, it's unbearable some days.
__________________
a tout le monde, a tous les amis. je vous aime, je dois partir.
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#6
02-04-2006, 04:26 AM
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Would an HRV be very portable between houses do you think?
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#7
02-04-2006, 04:43 AM
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For my 375 I started out with a bathroom fan in the fish room, and found that it was noisier than I liked given its capacity, and salt creep became a problem.
Eventually went with a Vortex inline squirrel cage fan like the attached. http://http://cgi.ebay.com/ws/eBayIS...tem=7721464970 Much quieter (also due to being placed remotely in the finished basement ceiling) and more powerful. Vented out the wall, with a fresh air supply provided to avoid any negative pressure situations. I got mine from the local hydroponics store ... they even accepted a charge card 
__________________
______________ - Lyle Our tank http://www.pansy-paws.com/aquarium/ 29 gallon nano-tank
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#8
02-04-2006, 02:36 PM
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Quote:
 That will remove humid air alright. Just remember the negative balance thing. Good thing its warm there. One could take an HRV unit with them but depending on how its installed, a lot of structure will be left. It should enhance the value of a house, enough to cover the cost. De-humidifiers work fine. Just not the most energy efficient things. I depend on one during the summer however, along with AC. Units like HRV,s are not the best in the summer when the outside air is very moist also. However most people with decent central air units seem to have no problems, esp. the ones that have their hoods andso on vented outside. I know several that also vent their large beckett skimmer outside also.
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Doug Last edited by Doug; 02-04-2006 at 02:47 PM.
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#9
02-04-2006, 06:14 PM
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Venting with a bathroom fan will work as long as the humidity level outside is lower than the humidity in your house. Being in Edmonton this is probably your case, but for those of us in more humid locals this simple fix can actually make matters worse. For example, here humidity outside right now is 86%. If I ran a bathroom fan 24/7, I would be exchanging humid indoor air with outdoor air that is even more humid, not a good trade.
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#10
02-04-2006, 06:53 PM
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The HRV will work the same as a exhaust fan to lower the relative humidity, the HRV just recovers most of the energy used to heat the air in the house before it is exhausted while using no more energy to run. Even here in Calgary the outside humidity is 60% but that is at a temperature of less than 5 degrees. That same air at 20 degrees would be less than 10% relative humidity. Warm air has a greater capacity to hold moisture, Thus, it would contain 10% of the total capacity of water that it could hold before the water condensed out once warmed to room temperature. So even at 86% RH outside, you would gain significant drying of the inside air.
Here is an interesting chart to see just how much change in relative humidity warming the air makes. http://www.skuttle.com/humid.html
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I retired and got a fixed income but it's broke. Ed _______________________________________ 50 gallon FOWLR, 10 gallon sump. 130 gallon reef, 20 gallon sump, 10 gallon refugium. 10 gallon quarantine. 60 gallon winter tank for pond fish. 300 gallon pond with waterfall.
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